FASTPATH-QOS-COS-MIB

InterfaceIndexOrZeroThis textual convention is an extension of the InterfaceIndex convention. The latter defines a greater than zero value used to identify an interface or interface sub-layer in the managed system. This extension permits the additional value of zero. the value zero is object-specific and must therefore be defined as part of the description of any object which uses this syntax. Examples of the usage of zero might include situations where interface was unknown, or when none or all interfaces need to be referenced. (0..2147483647) · Integer32 · hint d

This is a unique index for an entry in the agentCosMapIpPrecTable. A non-zero value indicates the ifIndex for the corresponding interface entry in the ifTable. A value of zero represents global configuration, which in turn causes all interface entries to be updated for a set operation, or reflects the most recent global setting for a get operation.

Unsigned32 (0..7)

The IP precedence value contained in the received frame. This value is only indicated in IP packets, but is independent of both media-type and frame tagging. Non-IP packets are handled in accordance with the dot1dPortDefaultUserPriority value of the ingress port.

Unsigned32 (0..7)

Traffic class priority queue the received frame is mapped to. This represents the actual configuration setting the port is using.

InterfaceIndexOrZeroThis textual convention is an extension of the InterfaceIndex convention. The latter defines a greater than zero value used to identify an interface or interface sub-layer in the managed system. This extension permits the additional value of zero. the value zero is object-specific and must therefore be defined as part of the description of any object which uses this syntax. Examples of the usage of zero might include situations where interface was unknown, or when none or all interfaces need to be referenced. (0..2147483647) · Integer32 · hint d

This is a unique index for an entry in the agentCosMapIpDscpTable. A non-zero value indicates the ifIndex for the corresponding interface entry in the ifTable. A value of zero represents global configuration, which in turn causes all interface entries to be updated for a set operation, or reflects the most recent global setting for a get operation.

Unsigned32 (0..63)

The IP DSCP value contained in the received frame. This value is only indicated in IP packets, but is independent of both media-type and frame tagging. Non-IP packets are handled in accordance with the dot1dPortDefaultUserPriority value of the ingress port.

Unsigned32 (0..7)

Traffic class priority queue the received frame is mapped to.

InterfaceIndexOrZeroThis textual convention is an extension of the InterfaceIndex convention. The latter defines a greater than zero value used to identify an interface or interface sub-layer in the managed system. This extension permits the additional value of zero. the value zero is object-specific and must therefore be defined as part of the description of any object which uses this syntax. Examples of the usage of zero might include situations where interface was unknown, or when none or all interfaces need to be referenced. (0..2147483647) · Integer32 · hint d

This is a unique index for an entry in the agentCosMapIntfTrustTable. A non-zero value indicates the ifIndex for the corresponding interface entry in the ifTable. A value of zero represents global configuration, which in turn causes all interface entries to be updated for a set operation, or reflects the most recent global setting for a get operation.

INTEGER1 = untrusted2 = trustDot1p3 = trustIpPrecedence4 = trustIpDscp · Integer32

The class of service trust mode of an interface. When set to a trusted mode, the appropriate COS mapping table is used as follows: trustDot1p(2) : dot1dTrafficClassTable trustIpPrecedence(3): agentCosMapIpPrecTable trustIpDscp(4): agentCosMapIpDscpTable For an untrusted(1) interface, packets are handled in accordance with the dot1dPortDefaultUserPriority value of the ingress port.

Unsigned32

The traffic class (i.e. hardware queue) to which all untrusted traffic is assigned. This includes all traffic when the agentCosMapIntfTrustMode is set to untrusted(1), or just non-IP packets when in trustIpPrecedence(3) or trustIpDscp(4) modes. This is a read-only object that reflects the current setting of the dot1dPortDefaultUserPriority object as mapped to a traffic class through the dot1dTrafficClassEntry.

InterfaceIndexOrZeroThis textual convention is an extension of the InterfaceIndex convention. The latter defines a greater than zero value used to identify an interface or interface sub-layer in the managed system. This extension permits the additional value of zero. the value zero is object-specific and must therefore be defined as part of the description of any object which uses this syntax. Examples of the usage of zero might include situations where interface was unknown, or when none or all interfaces need to be referenced. (0..2147483647) · Integer32 · hint d

This is a unique index for an entry in the agentCosQueueControlTable, agentCosQueueTable, or agentCosQueueMgmtTable. A non-zero value indicates the ifIndex for the corresponding interface entry in the ifTable. A value of zero represents global configuration, which in turn causes all interface entries to be updated for a set operation, or reflects the most recent global setting for a get operation.

Unsigned32

Maximum bandwidth allowed for this interface as a whole, typically used to shape the outbound transmission rate. The value is specified in terms of percentage of overall link speed for the port in 1% increments. A value of 0 means there is no maximum bandwidth limit in effect and that the interface is allowed to transmit up to its maximum line rate (i.e., work conserving method). The default value is 0. When set to a non-zero value, the interface is restricted to using at most the bandwidth specified in this object for the outbound transmission rate (i.e., non-work-conserving method). This bandwidth value is independent of any per-queue maximum bandwidth value(s) in effect for the interface, as specified in the agentCosQueueMaxBandwidth ohject, and should be considered as a second-level transmission rate control mechanism that regulates the output of the entire interface regardless of which queues originate the outbound traffic.

INTEGER1 = taildrop2 = wred · Integer32

The management technique used for all queues on this interface. If taildrop(1), then all new packets presented to the queues are dropped based on some maximum threshold value(s). If wred(2), then an active queue management scheme is employed whereby packet drop precedence is considered during times of queue congestion using WRED parameters. The necessary queue management parameters are specified in the agentCosQueueMgmtTable for the corresponding agentCosQueueIntfIndex value. The default for this object is taildrop(1). Implementations that support this object but do not support weighted RED must return taildrop(1) for this value and must not allow a value of wred(2) to be set.

Unsigned32 (1..15)

The decay exponent value used with the weighted random early discard (WRED) algorithm to determine how quickly the average queue length calculation reacts to the current length of the queue. A higher value produces a slower response, meaning previously sampled queue length values are factored into the calculation for a longer period of time. The default value is 9. Use caution when changing this value from its default. If set too low, short traffic bursts can cause WRED to drop too many packets. If set too high, WRED might not detect queue congestion in a timely manner and becomes ineffective. The default value should be sufficient for most users. This object value is only used when the agentCosQueueMgmtType is set to wred(2) and is otherwise ignored.

INTEGER1 = enable2 = disable · Integer32

Causes the default values to be restored for all COS queue objects defined for this interface. This includes objects in the following tables: agentCosQueueTable agentCosQueueMgmtTable This object always reads as disable(2). This object may only be set to enable(1), which immediately causes the default value restoration action as described above. In essence, this models a momentary-style push button switch that triggers a restoration of the original default values for all affected objects.

INTEGER1 = percent2 = kbps · Integer32

Gets the units of the threshold value to percentage of port speed or kilobits per second (kbps).

Unsigned32

The COS queue index, numbered 0 to (n-1), where n is the total number of configurable interface queues for the device as indicated by agentCosQueueNumQueuesPerPort. In general, a higher numbered queue index is used to support higher priority traffic, although actual operation may be altered via configuration through this table.

INTEGER1 = strict2 = weighted · Integer32

The type of scheduling used for this queue. If strict(1), then all traffic placed on this queue is transmitted before any queue with a lower precedence (lower agentCosQueueIndex). A weighted(2) scheme gives this queue service relative to other weighted queues based on their relative agentCosQueueMinBandwidth object values. The default is weighted(2).

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

Minimum guaranteed bandwidth allotted to this queue. The value is specified in terms of percentage of overall link speed for the port in 1% increments. A value of 0 means there is no guaranteed minimum bandwidth in effect (best-effort service). The default value is 0. The sum of all agentCosQueueMinBandwidth object values for the queues on the same interface must not exceed 100%. If the agentCosQueueMaxBandwidth corresponding to the same agentCosQueueIndex on this interface is currently set to a non-zero value, then setting this object to a value greater than agentCosQueueMaxBandwidth automatically updates agentCosQueueMaxBandwidth to the same value to maintain a proper relationship between the minimum and maximum queue bandwidth specification. The value of this object is ignored when agentCosQueueSchedulerType is set to strict(1).

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

Maximum bandwidth allowed for this queue, typically used to shape the outbound transmission rate. The value is specified in terms of percentage of overall link speed for the port in 1% increments. A value of 0 means there is no maximum bandwidth limit in effect and that the queue is allowed to use any available excess bandwidth (i.e., work conserving method). The default value is 0. When set to a non-zero value, the queue is restricted to using at most the bandwidth specified in this object for the outbound transmission rate (i.e., non-work-conserving method). Any non-zero value set for this object must be equal to or greater than the value of agentCosQueueMinBandwidth for the same agentCosQueueIndex on this interface.

INTEGER1 = taildrop2 = wred · Integer32

The queue depth management technique used when per-queue specification is supported. If taildrop(1), then all new packets presented to the queue are dropped based on some maximum threshold value(s). If wred(2), then an active queue management scheme is employed whereby packet drop precedence is considered during times of queue congestion using WRED parameters. The necessary queue management parameters are specified in the agentCosQueueMgmtEntry for the corresponding agentCosQueueIntfIndex and agentCosQueueIndex values. The default for this object is taildrop(1). Implementations that do not support weighted RED must return taildrop(1) for this value and must not allow a value of wred(2) to be set.

Unsigned32

The COS queue drop precedence level, numbered 1 to p, where p is the total number of drop precedences supported per queue, as indicated by agentCosQueueNumDropPrecedenceLevels. This is used as the minor index into the table. Each supported drop precedence level for a queue has its own set of configuration parameters. The actual number of drop precedence levels supported depends on the device characteristics. For example, some implementations may allow for three levels of drop precedence (1/2/3, sometimes referred to as green/yellow/red), some may support two levels (1/2, or high/low), while others only one. Some devices use the lowest (highest-numbered) drop precedence level to represent non-TCP traffic.

SixteenthsAn unsigned integer representing the numerator of a value expressing a fraction in terms of sixteenths (0/16, 1/16, 2/16, up to 16/16). (0..16) · Unsigned32

Tail drop queue threshold above which all packets are dropped for the current drop precedence level. The value specifies the threshold based on a fraction of the overall device queue size in terms of sixteenths (0/16, 1/16, 2/16, ... 16/16). Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value is calculated from the agentCosQueueIndex and agentCosQueueDropPrecIndex as shown in the following table (values listed for drop precedence levels 1, 2, and 3, respectively): Queue Index 0: 16, 14, 12 Queue Index 1: 16, 14, 12 Queue Index 2: 16, 14, 12 Queue Index 3: 16, 14, 12 Queue Index 4: 16, 14, 12 Queue Index 5: 16, 14, 12 Queue Index 6: 16, 14, 12 Queue Index 7: 16, 14, 12 This object is only used when agentCosQueueMgmtType is set to taildrop(1).

SixteenthsAn unsigned integer representing the numerator of a value expressing a fraction in terms of sixteenths (0/16, 1/16, 2/16, up to 16/16). (0..16) · Unsigned32

Weighted RED minimum queue threshold, below which no packets are dropped for the current drop precedence level. The value specifies the threshold based on a fraction of the overall device queue size in terms of sixteenths (0/16, 1/16, 2/16, ... 16/16). Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value is calculated from the agentCosQueueIndex and agentCosQueueDropPrecIndex as shown in the following table (values listed for drop precedence levels 1, 2, and 3, respectively): Queue Index 0: 8, 6, 4 Queue Index 1: 9, 7, 5 Queue Index 2: 10, 8, 6 Queue Index 3: 11, 9, 7 Queue Index 4: 12, 10, 8 Queue Index 5: 13, 11, 9 Queue Index 6: 14, 12, 10 Queue Index 7: 15, 13, 11 This object is only used when agentCosQueueMgmtType is set to wred(2). Any value set for this object must be equal to or less than the value of agentCosQueueMgmtWredMaxThreshold.

SixteenthsAn unsigned integer representing the numerator of a value expressing a fraction in terms of sixteenths (0/16, 1/16, 2/16, up to 16/16). (0..16) · Unsigned32

Weighted RED maximum queue threshold, above which all packets are dropped for the current drop precedence level. The value specifies the threshold based on a fraction the overall device queue size in terms of sixteenths (0/16, 1/16, 2/16, ... 16/16). Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value is calculated from the agentCosQueueIndex and agentCosQueueDropPrecIndex as shown in the following table (values listed for drop precedence levels 1, 2, and 3, respectively): Queue Index 0: 16, 14, 12 Queue Index 1: 16, 14, 12 Queue Index 2: 16, 14, 12 Queue Index 3: 16, 14, 12 Queue Index 4: 16, 14, 12 Queue Index 5: 16, 14, 12 Queue Index 6: 16, 14, 12 Queue Index 7: 16, 14, 12 This object is only used when agentCosQueueMgmtType is set to wred(2). Any value set for this object must be equal to or greater than the value of agentCosQueueMgmtWredMinThreshold.

Unsigned32 (1..15)

A scaling factor used for the WRED calculation to determine the packet drop probability for the current drop precedence level. The value is specified as a number S from 1-15 and is used in the formula: 1/(2** S), meaning one packet is dropped out of every (2** S). Packet dropping begins when agentCosQueueMgmtWredMinThreshold is reached and proceeds linearly up to the (2**S) value specified by this object until the agentCosQueueMgmtWredMaxThreshold is reached, beyond which all packets are dropped. Smaller values of S produce a steeper slope, hence a higher incidence of randomly dropped packets. The default value is 10, which corresponds to a drop rate of 1 out of every (2**10)=1024 packets. This object is only used when agentCosQueueMgmtType is set to wred(2).

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

Tail drop queue threshold above which all packets are dropped for the current drop precedence level. The value specifies the threshold based on a percentage of the overall device queue size. Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value, for all queues, is 100% for drop precedence 1 and non-TCP traffic, 90% and 80% for drop precedences 2 and 3. This object is only used when agentCosQueueMgmtType is set to taildrop(1).

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

Weighted RED minimum queue threshold, below which no packets are dropped for the current drop precedence level. The value specifies the threshold based on a percentage of the overall device queue size. Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value, for all queues, is 100% for non-TCP traffic, 40%, 30% and 20% for TCP drop precedences 1, 2 and 3. This object is only used when agentCosQueueMgmtType is set to wred(2). Any value set for this object must be equal to or less than the value of agentCosQueueMgmtPercentWredMaxThreshold.

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

Weighted RED maximum queue threshold, above which all packets are dropped for the current drop precedence level. The value specifies the threshold based on a percentage of the overall device queue size. Since device implementations vary, the actual value deployed may be rounded up or down accordingly. The default value, for all queues, is 100% for drop precedence 1 and non-TCP traffic, 90% and 80% for drop precedences 2 and 3. This object is only used when agentCosQueueMgmtType is set to wred(2). Any value set for this object must be equal to or greater than the value of agentCosQueueMgmtPercentWredMinThreshold.

PercentAn unsigned integer representing a value expressed as a percentage with one percent increments. (0..100) · Unsigned32

A scaling factor used for the WRED calculation to determine the packet drop probability for the current drop precedence level. Packet dropping begins when agentCosQueueMgmtWredMinThreshold is reached and proceeds linearly up to the percentage value specified by this object until the agentCosQueueMgmtWredMaxThreshold is reached, beyond which all packets are dropped. The default value is 10. This object is only used when agentCosQueueMgmtType is set to wred(2).