CISCO-CASA-MIB

INTEGER1 = casaForwardingAgent2 = casaGLoBalManager3 = casaUnknownManager · Integer32

This indicates the user of the CASA component. casaForwardingAgent: indicates that the objects in this row pertain to the Forwarding Agent. casaGLoBalManager : indicates that the objects in this row pertain to the GLoBal Manager. casaUnknownManager : indicates that the associated service manager is not currently emumerated.

INTEGER1 = casaNotEnabled2 = casaEnabled3 = casaActive · Integer32

casaNotEnabled: indicates that CASA is not configured. casaEnabled : indicates that CASA is configured. If the CASA entity is a Forwarding Agent, it is waiting for a Wildcard Affinity. casaActive : indicates that CASA is operational. i.e. For the Service Manager this state indicates that at least one Wildcard Affinity has been sent. For a Forwarding Agent this state indicates that Wildcard Affinity has been received and CASA is forwarding matching IP packets to the Service Manager. Setting cCasaState to casaNotEnabled will shut CASA down. Setting cCasaState to casaEnabled results in the following sequence of events: The configuration parameters cCasaCfgAddress, cCasaCfgMcastAddress are validated. If validated CASA is shut down if its not already, followed by CASA being enabled with the configuration parameters taking effect. If the configuration parameters are not valid then the set operation fails. Setting cCasaState to casaActive is invalid.

TruthValue1 = true2 = falseRepresents a boolean value. · Integer32

true indicates that ciscoCasaStateChange notification is to be generated when the state changes. That is, the notification generation is enabled. false indicates that ciscoCasaStateChange notification generation is disabled.

IpAddress SIZE (4)

The configured IP address of the CASA feature. This IP address is unique per box participating in CASA. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaAddress.

IpAddress SIZE (4)

The configured IP subnet mask of the CASA feature. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaAddressMask.

IpAddress SIZE (4)

The multicast IP address for this CASA Entity. This is used to listen for Wildcard Affinities in the case of a Forwarding Agent, or for sending Wildcard Affinities in the case of a Service Manager. This takes effect in the running system when cCasaState is set to casaEnabled, at which time this object is copied to cCasaMcastAddress.

IpAddress SIZE (4)

The operational IP address of the CASA Entity. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgAddress. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

IpAddress SIZE (4)

The operational IP subnet mask of the CASA feature. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgAddressMask. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

IpAddress SIZE (4)

The operational multicast IP address for this CASA Entity. This is used to listen for Wildcard Affinities in the case of a Forwarding Agent, or for sending Wildcard Affinities in the case of a Service Manager. When cCasaState is set to casaEnabled, this object attains the value contained in cCasaCfgMcastAddress. A get on this object when cCasaState is casaNotEnabled returns a noSuchObject exception.

Gauge32 · affinities

This is the number of affinities in the affinity cache. This is the number of entries in each of the following tables: cCasaAffinityCacheSrcTable, cCasaAffinityCacheDestTable, cCasaAffinityCacheDispatchTable

Unsigned32 · affinities

This is the maximum number of affinities (high water mark) concurrently held in the affinity cache since last time cCasaState transitioned to cCasaEnabled or since cCasaAffinityCacheHiWtrMrk was reset. Resetting this object is achieved via setting this object to 0. Attempting to set this object to any other value will result in a wrongValue error.

TimeStampThe value of the sysUpTime object at which a specific occurrence happened. The specific occurrence must be defined in the description of any object defined using this type. If sysUpTime is reset to zero as a result of a re- initialization of the network management (sub)system, then the values of all TimeStamp objects are also reset. However, after approximately 497 days without a re- initialization, the sysUpTime object will reach 2^^32-1 and then increment around to zero; in this case, existing values of TimeStamp objects do not change. This can lead to ambiguities in the value of TimeStamp objects. · TimeTicks

This indicates when cCasaAffinityCacheHiWtrMrk was set to 0.

Counter32 · affinities

Count of affinities which we were unable to enter in the affinity cache due to low memory conditions.

Counter32 · packets

Number of packets which matched a Fixed Affinity stored in this Forwarding Agent Fixed Affinity cache.

Counter64 (0..18446744073709551615) · packets

Number of packets which matched a Fixed Affinity stored in this Forwarding Agent fixed affinity cache. This object is a 64-bit version of cCasaHits.

Counter32 · packets

Number of packets which did not match a Fixed Affinity stored in this Forwarding Agent fixed affinity cache.

Counter64 (0..18446744073709551615) · packets

Number of packets which did not match a Fixed Affinity stored in this Forwarding Agent fixed affinity cache. This object is a 64-bit version of cCasaAffinityMisses.

Counter32 · affinities

Number of expected Fixed Affinities that were not received from the Service Manager for this Wildcard Affinity within a period of time from when a Fixed Affinity was requested by this Forwarding Agent.

Counter32 · packets

Number of Interest Packets send to the Service Manager by this Forwarding Agent or the number of Interest Packets received by this Service Manager.

Counter32 · packets

Number of Tickle packets sent to the Service Manager by this Forwarding Agent or the number of Tickle Packets received by this Service Manager.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

Multicast port which this CASA Entity uses to exchange Wildcard Affinities with its CASA Partner.

DisplayStringRepresents textual information taken from the NVT ASCII character set, as defined in pages 4, 10-11 of RFC 854. To summarize RFC 854, the NVT ASCII repertoire specifies: - the use of character codes 0-127 (decimal) - the graphics characters (32-126) are interpreted as US ASCII - NUL, LF, CR, BEL, BS, HT, VT and FF have the special meanings specified in RFC 854 - the other 25 codes have no standard interpretation - the sequence 'CR LF' means newline - the sequence 'CR NUL' means carriage-return - an 'LF' not preceded by a 'CR' means moving to the same column on the next line. - the sequence 'CR x' for any x other than LF or NUL is illegal. (Note that this also means that a string may end with either 'CR LF' or 'CR NUL', but not with CR.) Any object defined using this syntax may not exceed 255 characters in length. SIZE (0..64) · OCTET STRING · hint 255a

Multicast password corresponding to this Multicast port. This is used to authenticate all control flows between this CASA Entity and its CASA Partner. Issuing a set on this object with a zero length string indicates that the password is not in effect. For security purposes, a get on this returns a zero length string.

Unsigned32 (0..3600) · seconds

Number of seconds that the previous password stays in effect after receiving the new password. This is to allow all CASA components time to synchronize with the new password.

Counter32 · failures

Count of multicast password authentication failures.

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 is used by a management station to create or delete the row entry in cCasaAdminTable following the RowStatus textual convention.

IpAddress SIZE (4)

The value used to compare the source IP address of TCP and UDP packets.

CasaFixedAffinityIndexThis is a unique identifier for a Fixed Affinity. SIZE (16) · OCTET STRING

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the source port of the TCP and UDP packets.

IpAddress SIZE (4)

The value used to compare the destination IP address of the TCP and UDP packets.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the destination port of the TCP and UDP packets.

CiscoIpProtocolIP protocol number range.Reference: Internet Protocol. J. Postel. RFC791 (0..255) · Integer32

The value used to compare the IP Protocol field of the TCP and UDP packets.

IpAddress SIZE (4)

IP address to which this Casa Entity will forward packets which match this Affinity.

IpAddress SIZE (4)

The value used to compare the destination IP address of the TCP and UDP packets.

CasaFixedAffinityIndexThis is a unique identifier for a Fixed Affinity. SIZE (16) · OCTET STRING

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the destination port of the TCP and UDP packets.

IpAddress SIZE (4)

The value used to compare the source IP address of TCP and UDP packets.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the source port of the TCP and UDP packets.

CiscoIpProtocolIP protocol number range.Reference: Internet Protocol. J. Postel. RFC791 (0..255) · Integer32

The value used to compare the IP Protocol field of the TCP and UDP packets.

IpAddress SIZE (4)

IP address to which this Casa Entity will forward packets which match this Affinity.

IpAddress SIZE (4)

IP address to which this Casa Entity will forward packets which match this Affinity.

CasaFixedAffinityIndexThis is a unique identifier for a Fixed Affinity. SIZE (16) · OCTET STRING

The value of this index uniquely identifies entries in the table for the Casa Entity. This index is a constructed by concatenating values of SourceAddr, SourcePort, DestinationAddr, DestinationPort, and SrcProtocol. However the order is implementation specific to optimize processing of the powerful get next snmp operation.

IpAddress SIZE (4)

The value used to compare the destination IP address of the TCP and UDP packets.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the destination port of the TCP and UDP packets.

IpAddress SIZE (4)

The value used to compare the source IP address of TCP and UDP packets.

CiscoPortThe TCP or UDP port number range.Reference: Transmission Control Protocol. J. Postel. RFC793, User Datagram Protocol. J. Postel. RFC768 (0..65535) · Integer32

The value used to compare the source port of the TCP and UDP packets.

CiscoIpProtocolIP protocol number range.Reference: Internet Protocol. J. Postel. RFC791 (0..255) · Integer32

The value used to compare the IP Protocol field of the TCP and UDP packets.