RBRIDGE-MIB

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

Nicknames are 16-bit quantities that act as abbreviations for RBridge's 48-bit IS-IS System ID to achieve a more compact encoding. ⓘ

Unsigned32 (0..255)

This RBridge's priority to hold this nickname. When the nickname is configured, the default value of this object is 192. When the nickname is configured, the most significant bit (0x80) must be set and the bottom 7 bits have the default value of 0x40, so 0x80 + 0x40 == 0xC0, which is 192 decimal. Additionally, the bottom 7 bits could be configured to a value other than 0x40. The value of this object MUST be retained across re-initializations of the management system. ⓘ

Unsigned32 (1..65535)

The distribution tree root priority for this nickname. The default value of this object is 32768. The value of this object MUST be retained across re-initializations of the management system. ⓘ

INTEGER1 = static2 = dynamic · Integer32

This object indicates the status of the entry. The default value is static(1). static(1) - this entry has been configured and will remain after the next reset of the RBridge. dynamic(2) - this entry has been acquired by the RBridge nickname acquisition protocol. ⓘ

RowStatus1 = active2 = notInService3 = notReady4 = createAndGo5 = createAndWait6 = destroyThe RowStatus textual convention is used to manage the creation and deletion of conceptual rows, and is used as the value of the SYNTAX clause for the status column of a conceptual row (as described in Section 7.7.1 of [2].) The status column has six defined values: - `active', which indicates that the conceptual row is available for use by the managed device; - `notInService', which indicates that the conceptual row exists in the agent, but is unavailable for use by the managed device (see NOTE below); 'notInService' has no implication regarding the internal consistency of the row, availability of resources, or consistency with the current state of the managed device; - `notReady', which indicates that the conceptual row exists in the agent, but is missing information necessary in order to be available for use by the managed device (i.e., one or more required columns in the conceptual row have not been instanciated); - `createAndGo', which is supplied by a management station wishing to create a new instance of a conceptual row and to have its status automatically set to active, making it available for use by the managed device; - `createAndWait', which is supplied by a management station wishing to create a new instance of a conceptual row (but not make it available for use by the managed device); and, - `destroy', which is supplied by a management station wishing to delete all of the instances associated with an existing conceptual row. Whereas five of the six values (all except `notReady') may be specified in a management protocol set operation, only three values will be returned in response to a management protocol retrieval operation: `notReady', `notInService' or `active'. That is, when queried, an existing conceptual row has only three states: it is either available for use by the managed device (the status column has value `active'); it is not available for use by the managed device, though the agent has sufficient information to attempt to make it so (the status column has value `notInService'); or, it is not available for use by the managed device, and an attempt to make it so would fail because the agent has insufficient information (the state column has value `notReady'). NOTE WELL This textual convention may be used for a MIB table, irrespective of whether the values of that table's conceptual rows are able to be modified while it is active, or whether its conceptual rows must be taken out of service in order to be modified. That is, it is the responsibility of the DESCRIPTION clause of the status column to specify whether the status column must not be `active' in order for the value of some other column of the same conceptual row to be modified. If such a specification is made, affected columns may be changed by an SNMP set PDU if the RowStatus would not be equal to `active' either immediately before or after processing the PDU. In other words, if the PDU also contained a varbind that would change the RowStatus value, the column in question may be changed if the RowStatus was not equal to `active' as the PDU was received, or if the varbind sets the status to a value other than 'active'. Also note that whenever any elements of a row exist, the RowStatus column must also exist. To summarize the effect of having a conceptual row with a status column having a SYNTAX clause value of RowStatus, consider the following state diagram: STATE +--------------+-----------+-------------+------------- | A | B | C | D | |status col.|status column| |status column | is | is |status column ACTION |does not exist| notReady | notInService| is active --------------+--------------+-----------+-------------+------------- set status |noError ->D|inconsist- |inconsistent-|inconsistent- column to | or | entValue| Value| Value createAndGo |inconsistent- | | | | Value| | | --------------+--------------+-----------+-------------+------------- set status |noError see 1|inconsist- |inconsistent-|inconsistent- column to | or | entValue| Value| Value createAndWait |wrongValue | | | --------------+--------------+-----------+-------------+------------- set status |inconsistent- |inconsist- |noError |noError column to | Value| entValue| | active | | | | | | or | | | | | | | |see 2 ->D|see 8 ->D| ->D --------------+--------------+-----------+-------------+------------- set status |inconsistent- |inconsist- |noError |noError ->C column to | Value| entValue| | notInService | | | | | | or | | or | | | | | |see 3 ->C| ->C|see 6 --------------+--------------+-----------+-------------+------------- set status |noError |noError |noError |noError ->A column to | | | | or destroy | ->A| ->A| ->A|see 7 --------------+--------------+-----------+-------------+------------- set any other |see 4 |noError |noError |see 5 column to some| | | | value | | see 1| ->C| ->D --------------+--------------+-----------+-------------+------------- (1) goto B or C, depending on information available to the agent. (2) if other variable bindings included in the same PDU, provide values for all columns which are missing but required, and all columns have acceptable values, then return noError and goto D. (3) if other variable bindings included in the same PDU, provide legal values for all columns which are missing but required, then return noError and goto C. (4) at the discretion of the agent, the return value may be either: inconsistentName: because the agent does not choose to create such an instance when the corresponding RowStatus instance does not exist, or inconsistentValue: if the supplied value is inconsistent with the state of some other MIB object's value, or noError: because the agent chooses to create the instance. If noError is returned, then the instance of the status column must also be created, and the new state is B or C, depending on the information available to the agent. If inconsistentName or inconsistentValue is returned, the row remains in state A. (5) depending on the MIB definition for the column/table, either noError or inconsistentValue may be returned. (6) the return value can indicate one of the following errors: wrongValue: because the agent does not support notInService (e.g., an agent which does not support createAndWait), or inconsistentValue: because the agent is unable to take the row out of service at this time, perhaps because it is in use and cannot be de-activated. (7) the return value can indicate the following error: inconsistentValue: because the agent is unable to remove the row at this time, perhaps because it is in use and cannot be de-activated. (8) the transition to D can fail, e.g., if the values of the conceptual row are inconsistent, then the error code would be inconsistentValue. NOTE: Other processing of (this and other varbinds of) the set request may result in a response other than noError being returned, e.g., wrongValue, noCreation, etc. Conceptual Row Creation There are four potential interactions when creating a conceptual row: selecting an instance-identifier which is not in use; creating the conceptual row; initializing any objects for which the agent does not supply a default; and, making the conceptual row available for use by the managed device. Interaction 1: Selecting an Instance-Identifier The algorithm used to select an instance-identifier varies for each conceptual row. In some cases, the instance- identifier is semantically significant, e.g., the destination address of a route, and a management station selects the instance-identifier according to the semantics. In other cases, the instance-identifier is used solely to distinguish conceptual rows, and a management station without specific knowledge of the conceptual row might examine the instances present in order to determine an unused instance-identifier. (This approach may be used, but it is often highly sub-optimal; however, it is also a questionable practice for a naive management station to attempt conceptual row creation.) Alternately, the MIB module which defines the conceptual row might provide one or more objects which provide assistance in determining an unused instance-identifier. For example, if the conceptual row is indexed by an integer-value, then an object having an integer-valued SYNTAX clause might be defined for such a purpose, allowing a management station to issue a management protocol retrieval operation. In order to avoid unnecessary collisions between competing management stations, `adjacent' retrievals of this object should be different. Finally, the management station could select a pseudo-random number to use as the index. In the event that this index was already in use and an inconsistentValue was returned in response to the management protocol set operation, the management station should simply select a new pseudo-random number and retry the operation. A MIB designer should choose between the two latter algorithms based on the size of the table (and therefore the efficiency of each algorithm). For tables in which a large number of entries are expected, it is recommended that a MIB object be defined that returns an acceptable index for creation. For tables with small numbers of entries, it is recommended that the latter pseudo-random index mechanism be used. Interaction 2: Creating the Conceptual Row Once an unused instance-identifier has been selected, the management station determines if it wishes to create and activate the conceptual row in one transaction or in a negotiated set of interactions. Interaction 2a: Creating and Activating the Conceptual Row The management station must first determine the column requirements, i.e., it must determine those columns for which it must or must not provide values. Depending on the complexity of the table and the management station's knowledge of the agent's capabilities, this determination can be made locally by the management station. Alternately, the management station issues a management protocol get operation to examine all columns in the conceptual row that it wishes to create. In response, for each column, there are three possible outcomes: - a value is returned, indicating that some other management station has already created this conceptual row. We return to interaction 1. - the exception `noSuchInstance' is returned, indicating that the agent implements the object-type associated with this column, and that this column in at least one conceptual row would be accessible in the MIB view used by the retrieval were it to exist. For those columns to which the agent provides read-create access, the `noSuchInstance' exception tells the management station that it should supply a value for this column when the conceptual row is to be created. - the exception `noSuchObject' is returned, indicating that the agent does not implement the object-type associated with this column or that there is no conceptual row for which this column would be accessible in the MIB view used by the retrieval. As such, the management station can not issue any management protocol set operations to create an instance of this column. Once the column requirements have been determined, a management protocol set operation is accordingly issued. This operation also sets the new instance of the status column to `createAndGo'. When the agent processes the set operation, it verifies that it has sufficient information to make the conceptual row available for use by the managed device. The information available to the agent is provided by two sources: the management protocol set operation which creates the conceptual row, and, implementation-specific defaults supplied by the agent (note that an agent must provide implementation-specific defaults for at least those objects which it implements as read-only). If there is sufficient information available, then the conceptual row is created, a `noError' response is returned, the status column is set to `active', and no further interactions are necessary (i.e., interactions 3 and 4 are skipped). If there is insufficient information, then the conceptual row is not created, and the set operation fails with an error of `inconsistentValue'. On this error, the management station can issue a management protocol retrieval operation to determine if this was because it failed to specify a value for a required column, or, because the selected instance of the status column already existed. In the latter case, we return to interaction 1. In the former case, the management station can re-issue the set operation with the additional information, or begin interaction 2 again using `createAndWait' in order to negotiate creation of the conceptual row. NOTE WELL Regardless of the method used to determine the column requirements, it is possible that the management station might deem a column necessary when, in fact, the agent will not allow that particular columnar instance to be created or written. In this case, the management protocol set operation will fail with an error such as `noCreation' or `notWritable'. In this case, the management station decides whether it needs to be able to set a value for that particular columnar instance. If not, the management station re-issues the management protocol set operation, but without setting a value for that particular columnar instance; otherwise, the management station aborts the row creation algorithm. Interaction 2b: Negotiating the Creation of the Conceptual Row The management station issues a management protocol set operation which sets the desired instance of the status column to `createAndWait'. If the agent is unwilling to process a request of this sort, the set operation fails with an error of `wrongValue'. (As a consequence, such an agent must be prepared to accept a single management protocol set operation, i.e., interaction 2a above, containing all of the columns indicated by its column requirements.) Otherwise, the conceptual row is created, a `noError' response is returned, and the status column is immediately set to either `notInService' or `notReady', depending on whether it has sufficient information to (attempt to) make the conceptual row available for use by the managed device. If there is sufficient information available, then the status column is set to `notInService'; otherwise, if there is insufficient information, then the status column is set to `notReady'. Regardless, we proceed to interaction 3. Interaction 3: Initializing non-defaulted Objects The management station must now determine the column requirements. It issues a management protocol get operation to examine all columns in the created conceptual row. In the response, for each column, there are three possible outcomes: - a value is returned, indicating that the agent implements the object-type associated with this column and had sufficient information to provide a value. For those columns to which the agent provides read-create access (and for which the agent allows their values to be changed after their creation), a value return tells the management station that it may issue additional management protocol set operations, if it desires, in order to change the value associated with this column. - the exception `noSuchInstance' is returned, indicating that the agent implements the object-type associated with this column, and that this column in at least one conceptual row would be accessible in the MIB view used by the retrieval were it to exist. However, the agent does not have sufficient information to provide a value, and until a value is provided, the conceptual row may not be made available for use by the managed device. For those columns to which the agent provides read-create access, the `noSuchInstance' exception tells the management station that it must issue additional management protocol set operations, in order to provide a value associated with this column. - the exception `noSuchObject' is returned, indicating that the agent does not implement the object-type associated with this column or that there is no conceptual row for which this column would be accessible in the MIB view used by the retrieval. As such, the management station can not issue any management protocol set operations to create an instance of this column. If the value associated with the status column is `notReady', then the management station must first deal with all `noSuchInstance' columns, if any. Having done so, the value of the status column becomes `notInService', and we proceed to interaction 4. Interaction 4: Making the Conceptual Row Available Once the management station is satisfied with the values associated with the columns of the conceptual row, it issues a management protocol set operation to set the status column to `active'. If the agent has sufficient information to make the conceptual row available for use by the managed device, the management protocol set operation succeeds (a `noError' response is returned). Otherwise, the management protocol set operation fails with an error of `inconsistentValue'. NOTE WELL A conceptual row having a status column with value `notInService' or `notReady' is unavailable to the managed device. As such, it is possible for the managed device to create its own instances during the time between the management protocol set operation which sets the status column to `createAndWait' and the management protocol set operation which sets the status column to `active'. In this case, when the management protocol set operation is issued to set the status column to `active', the values held in the agent supersede those used by the managed device. If the management station is prevented from setting the status column to `active' (e.g., due to management station or network failure) the conceptual row will be left in the `notInService' or `notReady' state, consuming resources indefinitely. The agent must detect conceptual rows that have been in either state for an abnormally long period of time and remove them. It is the responsibility of the DESCRIPTION clause of the status column to indicate what an abnormally long period of time would be. This period of time should be long enough to allow for human response time (including `think time') between the creation of the conceptual row and the setting of the status to `active'. In the absence of such information in the DESCRIPTION clause, it is suggested that this period be approximately 5 minutes in length. This removal action applies not only to newly-created rows, but also to previously active rows which are set to, and left in, the notInService state for a prolonged period exceeding that which is considered normal for such a conceptual row. Conceptual Row Suspension When a conceptual row is `active', the management station may issue a management protocol set operation which sets the instance of the status column to `notInService'. If the agent is unwilling to do so, the set operation fails with an error of `wrongValue' or `inconsistentValue'. Otherwise, the conceptual row is taken out of service, and a `noError' response is returned. It is the responsibility of the DESCRIPTION clause of the status column to indicate under what circumstances the status column should be taken out of service (e.g., in order for the value of some other column of the same conceptual row to be modified). Conceptual Row Deletion For deletion of conceptual rows, a management protocol set operation is issued which sets the instance of the status column to `destroy'. This request may be made regardless of the current value of the status column (e.g., it is possible to delete conceptual rows which are either `notReady', `notInService' or `active'.) If the operation succeeds, then all instances associated with the conceptual row are immediately removed. · Integer32

This object indicates the status of the entry.

Unsigned32 (1..65535)

The port number of the port for which this entry contains RBridge management information. ⓘ

InterfaceIndexA unique value, greater than zero, for each interface or interface sub-layer in the managed system. It is recommended that values are assigned contiguously starting from 1. The value for each interface sub-layer must remain constant at least from one re-initialization of the entity's network management system to the next re-initialization. (1..2147483647) · Integer32 · hint d

The value of the instance of the ifIndex object, defined in the IF-MIB, for the interface corresponding to this port. The RBridge port sits on top of this interface.

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

Disable port bit. When this bit is set (true), all frames received or to be transmitted are discarded, with the possible exception of some layer 2 control frames that may be generated and transmitted or received and processed locally. Default value is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

End-station service disable (trunk port) bit. When this bit is set (true), all native frames received on the port and all native frames that would have been sent on the port are discarded. Default value is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

TRILL traffic disable (access port) bit. If this bit is set, the goal is to avoid sending any TRILL frames, except TRILL-Hello frames, on the port, since it is intended only for native end-station traffic. This ensures that the link is not on the shortest path for any destination. Default value is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

Use point-to-point (P2P) Hellos bit. If this bit is set, Hellos sent on this port are IS-IS P2P Hellos, not the default TRILL-Hellos. In addition, the IS-IS P2P three-way handshake is used on P2P RBridge links. Default value is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

INTEGER1 = uninhibited2 = portInhibited3 = vlanInhibited4 = disabled5 = broken · Integer32

The port's current state. If the entire port is inhibited, its state is portInhibited(2). If specific VLANs are inhibited, the state is vlanInhibited(3), and rbridgeVlanPortTable will tell which VLANs are inhibited. For ports that are disabled (see rbridgeBasePortDisable), this object will have a value of disabled(4). If the RBridge has detected a port that is malfunctioning, it will place that port into the broken(5) state. ⓘ

Unsigned32 · seconds

Time in seconds that this RBridge will inhibit forwarding on this port after it observes a spanning tree root bridge change on a link or receives conflicting VLAN forwarder information. The default value is 30. The value of this object MUST be retained across re-initializations of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

Disable learning of MAC addresses seen on this port. To disable learning, the value of this object must be set to 'true'. The default is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

VlanIdThe VLAN-ID that uniquely identifies a VLAN. This is the 12-bit VLAN-ID used in the VLAN Tag header. The range is defined by the REFERENCEd specification.Reference: IEEE Std 802.1Q 2003 Edition, Virtual Bridged Local Area Networks. (1..4094) · Integer32 · hint d

The VLAN that a Designated RBridge (DRB) will specify in its TRILL-Hellos as the VLAN to be used by all RBridges on the link for TRILL frames. This VLAN must be enabled on this port. The value of this object MUST be retained across re-initializations of the management system. ⓘ

VlanIdThe VLAN-ID that uniquely identifies a VLAN. This is the 12-bit VLAN-ID used in the VLAN Tag header. The range is defined by the REFERENCEd specification.Reference: IEEE Std 802.1Q 2003 Edition, Virtual Bridged Local Area Networks. (1..4094) · Integer32 · hint d

The VLAN being used on this link for TRILL frames. ⓘ

BridgeIdThe Bridge-Identifier, as used in the Spanning Tree Protocol, to uniquely identify a bridge. Its first two octets (in network byte order) contain a priority value, and its last 6 octets contain the MAC address used to refer to a bridge in a unique fashion (typically, the numerically smallest MAC address of all ports on the bridge). SIZE (8) · OCTET STRING

The bridge identifier of the root of the spanning tree, as learned from a Bridge PDU (BPDU) received on this port. For the Multiple Spanning Tree Protocol (MSTP), this is the root bridge of the Common and Internal Spanning Tree (CIST). If no BPDU has been heard, the value returned is a string of zeros. ⓘ

Counter32 · changes

The number of times a change in the root bridge is seen from spanning tree BPDUs received on this port, indicating a change in bridged LAN topology. Each such change may cause the port to be inhibited for a period of time. This counter should be synchronized with ifCounterDiscontinuityTime. Discontinuities in the value of this counter can occur at re-initialization of the management system. ⓘ

BridgeIdThe Bridge-Identifier, as used in the Spanning Tree Protocol, to uniquely identify a bridge. Its first two octets (in network byte order) contain a priority value, and its last 6 octets contain the MAC address used to refer to a bridge in a unique fashion (typically, the numerically smallest MAC address of all ports on the bridge). SIZE (8) · OCTET STRING

The Bridge ID to be used as the spanning tree root in BPDUs sent for the Wiring Closet topology solution described in [RFC6325]. Note that the same value of this object must be set on all RBridge ports participating in this solution. The default value is all 0s. A non-zero value configured into this object indicates that this solution is in use. The value of this object MUST be retained across re-initializations of the management system. ⓘ

Unsigned32

The identity of this Filtering Database.

MacAddressRepresents an 802 MAC address represented in the `canonical' order defined by IEEE 802.1a, i.e., as if it were transmitted least significant bit first, even though 802.5 (in contrast to other 802.x protocols) requires MAC addresses to be transmitted most significant bit first. SIZE (6) · OCTET STRING · hint 1x:

A unicast MAC address for which the device has forwarding information.

Unsigned32 (0..65535)

Either the value '0', or the RBridge port number of the port on which a frame having a source address equal to the value of the corresponding instance of rbridgeUniFdbAddr has been seen. A value of '0' indicates that the port number has not been learned but that the device does have some information about this MAC address. Implementors are encouraged to assign the port value to this object whenever it is available, even for addresses for which the corresponding value of rbridgeUniFdbStatus is not learned(3).

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

The RBridge nickname that is placed in the egress nickname field of a TRILL frame sent to this rbridgeFdbAddress in this rbridgeFdbId. ⓘ

Unsigned32 (0..255)

The confidence level associated with this entry. ⓘ

INTEGER1 = other2 = invalid3 = learned4 = self5 = mgmt6 = esadi · Integer32

The status of this entry. The meanings of the values are: other(1) - none of the following. invalid(2) - this entry is no longer valid (e.g., it was learned but has since aged out) but has not yet been flushed from the table. learned(3) - the information in this entry was learned and is being used. self(4) - the value of the corresponding instance of rbridgeFdbAddress represents one of the device's addresses. The corresponding instance of rbridgeFdbPort indicates which of the device's ports has this address. mgmt(5) - the value of the corresponding instance of rbridgeFdbAddress was configured by management. esadi(6) - the value of the corresponding instance of rbridgeFdbAddress was learned from ESADI.

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

An RBridge nickname for which this RBridge has forwarding information.

Unsigned32 (0..65535)

The RBridge port number of the port attached to the next-hop RBridge for the path towards the RBridge whose nickname is specified in this entry.

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

The nickname of the next-hop RBridge for the path towards the RBridge whose nickname is specified in this entry.

Unsigned32

The hop count from this ingress RBridge to the egress RBridge whose nickname is specified in rbridgeUniFibNickname.

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

The nickname of the multicast distribution tree.

PortListEach octet within this value specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the bridge is represented by a single bit within the value of this object. If that bit has a value of '1', then that port is included in the set of ports; the port is not included if its bit has a value of '0'. · OCTET STRING

The list of ports to which a frame destined to this multicast distribution tree is flooded. This may be pruned further based on other forwarding information.

Unsigned32 (1..4094 | 4096..4294967295)

The VLAN-ID referring to this VLAN.

Counter32 · times

The number of times this RBridge has lost appointed forwarder status for this VLAN on any of its ports. Discontinuities in the value of this counter can occur at re-initialization of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

Disable learning of MAC addresses seen in this VLAN. One application of this may be to restrict learning to ESADI. To disable learning, the value of this object should be set to 'true'. The default is 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

INTEGER1 = notSupported2 = ipv43 = ipv64 = ipv4v6 · Integer32

IP Multicast Snooping on this VLAN. For RBridges performing both IPv4 and IPv6 IP Multicast Snooping, the value returned is ipv4v6(4). ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

This VLAN has been inhibited by the RBridge due to conflicting forwarder information received from another RBridge, when the value of this object is 'true'. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

This RBridge is an appointed forwarder for this VLAN on this port, when the value of this object is 'true'. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

TRILL-Hellos tagged with this VLAN can be sent by this RBridge on this port, when the value of this object is 'true'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

VLAN mapping has been detected on the link attached to this port, when the value of this object is 'true'. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

If the RBridge is participating in an ESADI instance for this VLAN, the value of this object is 'true'. To disable participation, set it to 'false'. The value of this object MUST be retained across re-initializations of the management system. ⓘ

Unsigned32 (0..255)

Confidence level of address entries sent by this ESADI instance. The default is 16. The value of this object MUST be retained across re-initializations of the management system. ⓘ

Unsigned32 (0..127)

The priority of this RBridge for being selected as the DRB for this ESADI instance. The value of this object MUST be retained across re-initializations of the management system. ⓘ

RbridgeAddressThe Media Access Control (MAC) address used by an RBridge port. This may match the RBridge IS-IS SystemID. SIZE (6) · OCTET STRING · hint 1x:

The DRB on this ESADI instance's virtual link. ⓘ

Unsigned32 (0..127)

The holding time for this ESADI instance. The value of this object MUST be retained across re-initializations of the management system. ⓘ

RowStatus1 = active2 = notInService3 = notReady4 = createAndGo5 = createAndWait6 = destroyThe RowStatus textual convention is used to manage the creation and deletion of conceptual rows, and is used as the value of the SYNTAX clause for the status column of a conceptual row (as described in Section 7.7.1 of [2].) The status column has six defined values: - `active', which indicates that the conceptual row is available for use by the managed device; - `notInService', which indicates that the conceptual row exists in the agent, but is unavailable for use by the managed device (see NOTE below); 'notInService' has no implication regarding the internal consistency of the row, availability of resources, or consistency with the current state of the managed device; - `notReady', which indicates that the conceptual row exists in the agent, but is missing information necessary in order to be available for use by the managed device (i.e., one or more required columns in the conceptual row have not been instanciated); - `createAndGo', which is supplied by a management station wishing to create a new instance of a conceptual row and to have its status automatically set to active, making it available for use by the managed device; - `createAndWait', which is supplied by a management station wishing to create a new instance of a conceptual row (but not make it available for use by the managed device); and, - `destroy', which is supplied by a management station wishing to delete all of the instances associated with an existing conceptual row. Whereas five of the six values (all except `notReady') may be specified in a management protocol set operation, only three values will be returned in response to a management protocol retrieval operation: `notReady', `notInService' or `active'. That is, when queried, an existing conceptual row has only three states: it is either available for use by the managed device (the status column has value `active'); it is not available for use by the managed device, though the agent has sufficient information to attempt to make it so (the status column has value `notInService'); or, it is not available for use by the managed device, and an attempt to make it so would fail because the agent has insufficient information (the state column has value `notReady'). NOTE WELL This textual convention may be used for a MIB table, irrespective of whether the values of that table's conceptual rows are able to be modified while it is active, or whether its conceptual rows must be taken out of service in order to be modified. That is, it is the responsibility of the DESCRIPTION clause of the status column to specify whether the status column must not be `active' in order for the value of some other column of the same conceptual row to be modified. If such a specification is made, affected columns may be changed by an SNMP set PDU if the RowStatus would not be equal to `active' either immediately before or after processing the PDU. In other words, if the PDU also contained a varbind that would change the RowStatus value, the column in question may be changed if the RowStatus was not equal to `active' as the PDU was received, or if the varbind sets the status to a value other than 'active'. Also note that whenever any elements of a row exist, the RowStatus column must also exist. To summarize the effect of having a conceptual row with a status column having a SYNTAX clause value of RowStatus, consider the following state diagram: STATE +--------------+-----------+-------------+------------- | A | B | C | D | |status col.|status column| |status column | is | is |status column ACTION |does not exist| notReady | notInService| is active --------------+--------------+-----------+-------------+------------- set status |noError ->D|inconsist- |inconsistent-|inconsistent- column to | or | entValue| Value| Value createAndGo |inconsistent- | | | | Value| | | --------------+--------------+-----------+-------------+------------- set status |noError see 1|inconsist- |inconsistent-|inconsistent- column to | or | entValue| Value| Value createAndWait |wrongValue | | | --------------+--------------+-----------+-------------+------------- set status |inconsistent- |inconsist- |noError |noError column to | Value| entValue| | active | | | | | | or | | | | | | | |see 2 ->D|see 8 ->D| ->D --------------+--------------+-----------+-------------+------------- set status |inconsistent- |inconsist- |noError |noError ->C column to | Value| entValue| | notInService | | | | | | or | | or | | | | | |see 3 ->C| ->C|see 6 --------------+--------------+-----------+-------------+------------- set status |noError |noError |noError |noError ->A column to | | | | or destroy | ->A| ->A| ->A|see 7 --------------+--------------+-----------+-------------+------------- set any other |see 4 |noError |noError |see 5 column to some| | | | value | | see 1| ->C| ->D --------------+--------------+-----------+-------------+------------- (1) goto B or C, depending on information available to the agent. (2) if other variable bindings included in the same PDU, provide values for all columns which are missing but required, and all columns have acceptable values, then return noError and goto D. (3) if other variable bindings included in the same PDU, provide legal values for all columns which are missing but required, then return noError and goto C. (4) at the discretion of the agent, the return value may be either: inconsistentName: because the agent does not choose to create such an instance when the corresponding RowStatus instance does not exist, or inconsistentValue: if the supplied value is inconsistent with the state of some other MIB object's value, or noError: because the agent chooses to create the instance. If noError is returned, then the instance of the status column must also be created, and the new state is B or C, depending on the information available to the agent. If inconsistentName or inconsistentValue is returned, the row remains in state A. (5) depending on the MIB definition for the column/table, either noError or inconsistentValue may be returned. (6) the return value can indicate one of the following errors: wrongValue: because the agent does not support notInService (e.g., an agent which does not support createAndWait), or inconsistentValue: because the agent is unable to take the row out of service at this time, perhaps because it is in use and cannot be de-activated. (7) the return value can indicate the following error: inconsistentValue: because the agent is unable to remove the row at this time, perhaps because it is in use and cannot be de-activated. (8) the transition to D can fail, e.g., if the values of the conceptual row are inconsistent, then the error code would be inconsistentValue. NOTE: Other processing of (this and other varbinds of) the set request may result in a response other than noError being returned, e.g., wrongValue, noCreation, etc. Conceptual Row Creation There are four potential interactions when creating a conceptual row: selecting an instance-identifier which is not in use; creating the conceptual row; initializing any objects for which the agent does not supply a default; and, making the conceptual row available for use by the managed device. Interaction 1: Selecting an Instance-Identifier The algorithm used to select an instance-identifier varies for each conceptual row. In some cases, the instance- identifier is semantically significant, e.g., the destination address of a route, and a management station selects the instance-identifier according to the semantics. In other cases, the instance-identifier is used solely to distinguish conceptual rows, and a management station without specific knowledge of the conceptual row might examine the instances present in order to determine an unused instance-identifier. (This approach may be used, but it is often highly sub-optimal; however, it is also a questionable practice for a naive management station to attempt conceptual row creation.) Alternately, the MIB module which defines the conceptual row might provide one or more objects which provide assistance in determining an unused instance-identifier. For example, if the conceptual row is indexed by an integer-value, then an object having an integer-valued SYNTAX clause might be defined for such a purpose, allowing a management station to issue a management protocol retrieval operation. In order to avoid unnecessary collisions between competing management stations, `adjacent' retrievals of this object should be different. Finally, the management station could select a pseudo-random number to use as the index. In the event that this index was already in use and an inconsistentValue was returned in response to the management protocol set operation, the management station should simply select a new pseudo-random number and retry the operation. A MIB designer should choose between the two latter algorithms based on the size of the table (and therefore the efficiency of each algorithm). For tables in which a large number of entries are expected, it is recommended that a MIB object be defined that returns an acceptable index for creation. For tables with small numbers of entries, it is recommended that the latter pseudo-random index mechanism be used. Interaction 2: Creating the Conceptual Row Once an unused instance-identifier has been selected, the management station determines if it wishes to create and activate the conceptual row in one transaction or in a negotiated set of interactions. Interaction 2a: Creating and Activating the Conceptual Row The management station must first determine the column requirements, i.e., it must determine those columns for which it must or must not provide values. Depending on the complexity of the table and the management station's knowledge of the agent's capabilities, this determination can be made locally by the management station. Alternately, the management station issues a management protocol get operation to examine all columns in the conceptual row that it wishes to create. In response, for each column, there are three possible outcomes: - a value is returned, indicating that some other management station has already created this conceptual row. We return to interaction 1. - the exception `noSuchInstance' is returned, indicating that the agent implements the object-type associated with this column, and that this column in at least one conceptual row would be accessible in the MIB view used by the retrieval were it to exist. For those columns to which the agent provides read-create access, the `noSuchInstance' exception tells the management station that it should supply a value for this column when the conceptual row is to be created. - the exception `noSuchObject' is returned, indicating that the agent does not implement the object-type associated with this column or that there is no conceptual row for which this column would be accessible in the MIB view used by the retrieval. As such, the management station can not issue any management protocol set operations to create an instance of this column. Once the column requirements have been determined, a management protocol set operation is accordingly issued. This operation also sets the new instance of the status column to `createAndGo'. When the agent processes the set operation, it verifies that it has sufficient information to make the conceptual row available for use by the managed device. The information available to the agent is provided by two sources: the management protocol set operation which creates the conceptual row, and, implementation-specific defaults supplied by the agent (note that an agent must provide implementation-specific defaults for at least those objects which it implements as read-only). If there is sufficient information available, then the conceptual row is created, a `noError' response is returned, the status column is set to `active', and no further interactions are necessary (i.e., interactions 3 and 4 are skipped). If there is insufficient information, then the conceptual row is not created, and the set operation fails with an error of `inconsistentValue'. On this error, the management station can issue a management protocol retrieval operation to determine if this was because it failed to specify a value for a required column, or, because the selected instance of the status column already existed. In the latter case, we return to interaction 1. In the former case, the management station can re-issue the set operation with the additional information, or begin interaction 2 again using `createAndWait' in order to negotiate creation of the conceptual row. NOTE WELL Regardless of the method used to determine the column requirements, it is possible that the management station might deem a column necessary when, in fact, the agent will not allow that particular columnar instance to be created or written. In this case, the management protocol set operation will fail with an error such as `noCreation' or `notWritable'. In this case, the management station decides whether it needs to be able to set a value for that particular columnar instance. If not, the management station re-issues the management protocol set operation, but without setting a value for that particular columnar instance; otherwise, the management station aborts the row creation algorithm. Interaction 2b: Negotiating the Creation of the Conceptual Row The management station issues a management protocol set operation which sets the desired instance of the status column to `createAndWait'. If the agent is unwilling to process a request of this sort, the set operation fails with an error of `wrongValue'. (As a consequence, such an agent must be prepared to accept a single management protocol set operation, i.e., interaction 2a above, containing all of the columns indicated by its column requirements.) Otherwise, the conceptual row is created, a `noError' response is returned, and the status column is immediately set to either `notInService' or `notReady', depending on whether it has sufficient information to (attempt to) make the conceptual row available for use by the managed device. If there is sufficient information available, then the status column is set to `notInService'; otherwise, if there is insufficient information, then the status column is set to `notReady'. Regardless, we proceed to interaction 3. Interaction 3: Initializing non-defaulted Objects The management station must now determine the column requirements. It issues a management protocol get operation to examine all columns in the created conceptual row. In the response, for each column, there are three possible outcomes: - a value is returned, indicating that the agent implements the object-type associated with this column and had sufficient information to provide a value. For those columns to which the agent provides read-create access (and for which the agent allows their values to be changed after their creation), a value return tells the management station that it may issue additional management protocol set operations, if it desires, in order to change the value associated with this column. - the exception `noSuchInstance' is returned, indicating that the agent implements the object-type associated with this column, and that this column in at least one conceptual row would be accessible in the MIB view used by the retrieval were it to exist. However, the agent does not have sufficient information to provide a value, and until a value is provided, the conceptual row may not be made available for use by the managed device. For those columns to which the agent provides read-create access, the `noSuchInstance' exception tells the management station that it must issue additional management protocol set operations, in order to provide a value associated with this column. - the exception `noSuchObject' is returned, indicating that the agent does not implement the object-type associated with this column or that there is no conceptual row for which this column would be accessible in the MIB view used by the retrieval. As such, the management station can not issue any management protocol set operations to create an instance of this column. If the value associated with the status column is `notReady', then the management station must first deal with all `noSuchInstance' columns, if any. Having done so, the value of the status column becomes `notInService', and we proceed to interaction 4. Interaction 4: Making the Conceptual Row Available Once the management station is satisfied with the values associated with the columns of the conceptual row, it issues a management protocol set operation to set the status column to `active'. If the agent has sufficient information to make the conceptual row available for use by the managed device, the management protocol set operation succeeds (a `noError' response is returned). Otherwise, the management protocol set operation fails with an error of `inconsistentValue'. NOTE WELL A conceptual row having a status column with value `notInService' or `notReady' is unavailable to the managed device. As such, it is possible for the managed device to create its own instances during the time between the management protocol set operation which sets the status column to `createAndWait' and the management protocol set operation which sets the status column to `active'. In this case, when the management protocol set operation is issued to set the status column to `active', the values held in the agent supersede those used by the managed device. If the management station is prevented from setting the status column to `active' (e.g., due to management station or network failure) the conceptual row will be left in the `notInService' or `notReady' state, consuming resources indefinitely. The agent must detect conceptual rows that have been in either state for an abnormally long period of time and remove them. It is the responsibility of the DESCRIPTION clause of the status column to indicate what an abnormally long period of time would be. This period of time should be long enough to allow for human response time (including `think time') between the creation of the conceptual row and the setting of the status to `active'. In the absence of such information in the DESCRIPTION clause, it is suggested that this period be approximately 5 minutes in length. This removal action applies not only to newly-created rows, but also to previously active rows which are set to, and left in, the notInService state for a prolonged period exceeding that which is considered normal for such a conceptual row. Conceptual Row Suspension When a conceptual row is `active', the management station may issue a management protocol set operation which sets the instance of the status column to `notInService'. If the agent is unwilling to do so, the set operation fails with an error of `wrongValue' or `inconsistentValue'. Otherwise, the conceptual row is taken out of service, and a `noError' response is returned. It is the responsibility of the DESCRIPTION clause of the status column to indicate under what circumstances the status column should be taken out of service (e.g., in order for the value of some other column of the same conceptual row to be modified). Conceptual Row Deletion For deletion of conceptual rows, a management protocol set operation is issued which sets the instance of the status column to `destroy'. This request may be made regardless of the current value of the status column (e.g., it is possible to delete conceptual rows which are either `notReady', `notInService' or `active'.) If the operation succeeds, then all instances associated with the conceptual row are immediately removed. · Integer32

This object indicates the status of the entry.

Counter32 · frames

The number of times a multi-destination frame was dropped on this port because the Reverse Path Forwarding (RPF) check failed. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime object of the associated interface. ⓘ

Counter32 · frames

The number of times a frame was dropped on this port because its hop count was zero. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime object of the associated interface. ⓘ

Counter32 · frames

The number of times a frame was dropped on this port because it contained unsupported options. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime object of the associated interface. ⓘ

Counter64 (0..18446744073709551615) · frames

The number of TRILL-encapsulated frames that have been received by this port from its attached link, including management frames. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime object of the associated interface. ⓘ

Counter64 (0..18446744073709551615) · frames

The number of TRILL-encapsulated frames that have been transmitted by this port to its attached link, including management frames. Discontinuities in the value of this counter can occur at re-initialization of the management system, and at other times as indicated by the value of the ifCounterDiscontinuityTime object of the associated interface. ⓘ

INTEGER1 = ipv42 = ipv63 = ipv4v6 · Integer32

The IP address type of an IP multicast router detected on this port and VLAN. If only IPv4 router(s) are detected, the value returned is 'ipv4'. If only IPv6 routers are detected, the value returned is 'ipv6'. If both IPv4 and IPv6 routers are detected on this port and VLAN, the value returned is 'ipv4v6'. ⓘ

InetAddressType0 = unknown1 = ipv42 = ipv63 = ipv4z4 = ipv6z16 = dnsA value that represents a type of Internet address. unknown(0) An unknown address type. This value MUST be used if the value of the corresponding InetAddress object is a zero-length string. It may also be used to indicate an IP address that is not in one of the formats defined below. ipv4(1) An IPv4 address as defined by the InetAddressIPv4 textual convention. ipv6(2) An IPv6 address as defined by the InetAddressIPv6 textual convention. ipv4z(3) A non-global IPv4 address including a zone index as defined by the InetAddressIPv4z textual convention. ipv6z(4) A non-global IPv6 address including a zone index as defined by the InetAddressIPv6z textual convention. dns(16) A DNS domain name as defined by the InetAddressDNS textual convention. Each definition of a concrete InetAddressType value must be accompanied by a definition of a textual convention for use with that InetAddressType. To support future extensions, the InetAddressType textual convention SHOULD NOT be sub-typed in object type definitions. It MAY be sub-typed in compliance statements in order to require only a subset of these address types for a compliant implementation. Implementations must ensure that InetAddressType objects and any dependent objects (e.g., InetAddress objects) are consistent. An inconsistentValue error must be generated if an attempt to change an InetAddressType object would, for example, lead to an undefined InetAddress value. In particular, InetAddressType/InetAddress pairs must be changed together if the address type changes (e.g., from ipv6(2) to ipv4(1)). · Integer32

The IP multicast address type for which a listener has been detected by this RBridge. This MIB requires support for only IPv4 and IPv6 address types. ⓘ

InetAddressDenotes a generic Internet address. An InetAddress value is always interpreted within the context of an InetAddressType value. Every usage of the InetAddress textual convention is required to specify the InetAddressType object that provides the context. It is suggested that the InetAddressType object be logically registered before the object(s) that use the InetAddress textual convention, if they appear in the same logical row. The value of an InetAddress object must always be consistent with the value of the associated InetAddressType object. Attempts to set an InetAddress object to a value inconsistent with the associated InetAddressType must fail with an inconsistentValue error. When this textual convention is used as the syntax of an index object, there may be issues with the limit of 128 sub-identifiers specified in SMIv2, STD 58. In this case, the object definition MUST include a 'SIZE' clause to limit the number of potential instance sub-identifiers; otherwise the applicable constraints MUST be stated in the appropriate conceptual row DESCRIPTION clauses, or in the surrounding documentation if there is no single DESCRIPTION clause that is appropriate. SIZE (0..255) · OCTET STRING

The IP multicast address for which a listener has been detected by this RBridge. The address type of this object is specified in rbridgeSnoopingAddrType. This MIB requires support for only global IPv4 and IPv6 addresses, so the length of the object can be either 4 or 16 bytes. Hence, the index will not exceed the OID size limit. ⓘ

PortListEach octet within this value specifies a set of eight ports, with the first octet specifying ports 1 through 8, the second octet specifying ports 9 through 16, etc. Within each octet, the most significant bit represents the lowest numbered port, and the least significant bit represents the highest numbered port. Thus, each port of the bridge is represented by a single bit within the value of this object. If that bit has a value of '1', then that port is included in the set of ports; the port is not included if its bit has a value of '0'. · OCTET STRING

The set of ports on which a listener has been detected for this IP multicast address. ⓘ

Unsigned32 (0..65535)

The tree number of a distribution tree being computed by this RBridge. ⓘ

RbridgeNicknameThe 16-bit identifier used in TRILL as an abbreviation for the RBridge's 48-bit IS-IS System ID. The value 0 means a nickname is not specified, the values 0xFFC0 through 0xFFFE are reserved for future allocation, and the value 0xFFFF is permanently reserved.Reference: RFC 6325, Section 3.7 (0..65471) · Unsigned32 · hint d

The nickname of the distribution tree. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

Indicates whether this RBridge might choose this distribution tree to ingress a multi-destination frame. ⓘ

MacAddressRepresents an 802 MAC address represented in the `canonical' order defined by IEEE 802.1a, i.e., as if it were transmitted least significant bit first, even though 802.5 (in contrast to other 802.x protocols) requires MAC addresses to be transmitted most significant bit first. SIZE (6) · OCTET STRING · hint 1x:

The MAC address of a neighbor of this RBridge. ⓘ

Unsigned32

MTU size for this neighbor for IS-IS communication purposes. ⓘ

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

If true, indicates that the neighbor's tested MTU is less than the minimum acceptable inter-bridge link MTU for the campus (1470). ⓘ