DIFF-SERV-MIB

TEXTUAL-CONVENTION

The code point used for discriminating a traffic stream.

TEXTUAL-CONVENTION

A value indicating a Layer-4 protocol port number.

OBJECT-IDENTITY

OBJECT-TYPE

The diffServMFClassifierUnique object yields a unique new value for diffServMFClassifierIndex when read and subsequently set. This value must be tested for uniqueness.

OBJECT-TYPE

The diffServClassifierUnique object yields a unique new value for diffServClassifierNumber when read and subsequently set. This value must be tested for uniqueness.

OBJECT-TYPE

The diffServTBMeterUnique object yieldiffServ a unique new value for diffServTBMeterNumber when read and subsequently set. This value must be tested for uniqueness.

OBJECT-TYPE

The diffServActionUnique object yields a unique new value for diffServActionNumber when read and subsequently set. This value must be tested for uniqueness.

OBJECT-TYPE

The diffServQueueUnique object yields a unique new value for diffServQueueNumber when read and subsequently set. This value must be tested for uniqueness.

OBJECT-IDENTITY

OBJECT-TYPE

The 'Aggregate' Table enumerates Behavior Aggregate classifiers (DSCPs) that a system may identify traffic using.

OBJECT-TYPE

An 'aggregate' entry describes a single BA classifier.

OBJECT-TYPE

This is the Differentiated Services Code Point (DSCP) for the classifier. This object is only meant to be pointed to by a RowPointer from other tables, such as the diffServClassifierMatchObject, and is not actually configured or changed.

OBJECT-TYPE

A table of MF (IP 6-tuple multi-field) classifier entries that a system may use to identify traffic.

OBJECT-TYPE

A multi-field classifier entry describes a single MF classifier.

OBJECT-TYPE

This is a unique index for the classifier. This object is meant to be pointed to by a RowPointer from other tables, such as the diffServClassifierMatchObject.

OBJECT-TYPE

The type of IP address used by this classifier entry.

OBJECT-TYPE

The IP address to match against the packet's destination IP address.

OBJECT-TYPE

A mask for the matching of the destination IP address. A zero bit in the mask means that the corresponding bit in the address always matches.

OBJECT-TYPE

The IP address to match against the source IP address of each packet.

OBJECT-TYPE

A mask for the matching of the source IP address.

OBJECT-TYPE

The value that the DSCP in the packet must have to match this entry. A value of -1 indicates that a specific DSCP value has not been defined and thus all DSCP values are considered a match.

OBJECT-TYPE

The IP protocol to match against the IPv4 protocol number in the packet. A value of zero means match all.

OBJECT-TYPE

The minimum value that the layer-4 destination port number in the packet must have in order to match this classifier entry.

OBJECT-TYPE

The maximum value that the layer-4 destination port number in the packet must have in order to match this classifier entry. This value must be equal to or greater that the value specified for this entry in diffServMFClassifierDstL4PortMin.

OBJECT-TYPE

The minimum value that the layer-4 source port number in the packet must have in order to match this classifier entry.

OBJECT-TYPE

The maximum value that the layer-4 source port number in the packet must have in oder to match this classifier entry. This value must be equal to or greater that the value specified for this entry in dsSixTupleIpSrcL4PortMin.

OBJECT-TYPE

This indicates the status of this classifier entry.

OBJECT-TYPE

The classifier table enumerates specific classifiers that a system may apply, including Differentiated Services Code Points (DSCPs) and Multi-field discriminators such as {Source IP Address, Destination IP Address, IP Protocol, Source TCP/UDP Port, Destination TCP/UDP Port).

OBJECT-TYPE

An entry in the classifier table describes a single classifier.

OBJECT-TYPE

Specifies the direction for this entry on the interface. 'inbound' traffic is operated on during receipt, while 'outbound' traffic is operated on prior to transmission.

OBJECT-TYPE

diffServClassifierNumber enumerates the classifier entry.

OBJECT-TYPE

A pointer to the row that describes the applicable classifier. An obvious choice would be the diffServAggregateEntry for a given DSCP, but other choices include tables describing any classifier that may be of interest. If the row pointed to does not exist, the classifier is ignored. The NULL OID zeroDotZero is interpreted to match anything not matched by another classifier.

OBJECT-TYPE

The 'next' variable selects the appropriate meter or action to apply to this class of traffic.

OBJECT-TYPE

The sequence in which classifiers are applied, in ascending order. Classifiers with the same sequence number must be unambiguous. Classifiers with different sequence numbers may overlap in their ranges, with the understanding that the first applied classifier to match a packet is taken.

OBJECT-TYPE

Used to indicate how the classifer is configured.

OBJECT-TYPE

Additional information associated with how the classifier is configured.

OBJECT-TYPE

The RowStatus variable controls the activation, deactivation, or deletion of a classifier. Any writable variable may be modified whether the row is active or notInService.

OBJECT-TYPE

The Meter Table enumerates specific token bucket meters that a system may use to police a stream of classified traffic. Such a stream may include a single micro-flow, all traffic from a given source to a given destination, all traffic conforming to a single classifier, or any other cut of the traffic, including all of it. Note that the conceptual model requires all traffic to pass through one or more meters, and that the last meter configured in such a sequence must always conform. Counters in this table start counting on creation of the meter that specifies their existence.

OBJECT-TYPE

An entry in the meter table describes a single token bucket meter. Note that a meter has exactly one rate, defined as the burst size each time interval. Multiple meters may be cascaded should a multi-rate token bucket be needed in a given Per-Hop Behavior. An example of such a PHB is AF.

OBJECT-TYPE

The number of the meter, for reference from the classifier or in cascade from another meter.

OBJECT-TYPE

The number of microseconds in the token bucket interval for this meter. Note that implementations frequently do not keep time in microseconds internally, so in implementation the effect of this value must be approximated.

OBJECT-TYPE

The number of bytes in a single transmission burst. The rate at which the metered traffic may run is one burst per interval. Note that if multiple meters are cascaded onto one PHB, such as in AF, their intervals must be equal, and the peak rate of the data stream is the sum of their intervals per interval.

OBJECT-TYPE

If the traffic does not conform to the meter, the next meter or action to enquire of.

OBJECT-TYPE

The 'Succeed Next' pointer selects which action or queue on the interface that to be used with the message. Incoming traffic may use the value zeroDotZero in this variable to indicate that no queuing on receipt occurs. Incoming interfaces generally use queuing either to divert routing traffic for speedier processing during a flap, or for shaping purposes.

OBJECT-TYPE

The RowStatus variable controls the activation, deactivation, or deletion of a meter. Any writable variable may be modified whether the row is active or notInService.

OBJECT-TYPE

The Action Table enumerates specific apply to a stream of classified traffic. Such a stream may include a single micro-flow, all traffic from a given source to a given destination, all traffic conforming to a single classifier, or any other cut of the traffic, including all of it. Counters in this table start counting on creation of the action that specifies their existence.

OBJECT-TYPE

An entry in the action table describes the actions applied to traffic conforming to a given meter.

OBJECT-TYPE

The number of the meter, for reference from the classifier or in cascade from another meter.

OBJECT-TYPE

The 'Next' pointer selects which queue or Traffic Control Block on the interface. Incoming traffic may use the value zeroDotZero in this variable to indicate that no queuing on receipt occurs. Incoming interfaces generally use queuing either to divert routing traffic for speedier processing during a flap, or for shaping purposes.

OBJECT-TYPE

The DSCP that traffic conforming to this classifier and this meter is remarked with. Note that if the classifier is working from the same DSCP value, no effective change in the DSCP results. Differentiated Services may result in packet remarking both on ingress to a network and on egress, and it is quite possible that ingress and egress would occur in the same router.

OBJECT-TYPE

The min-threshold is the queue depth that a random drop process will seek to manage the queue's depth to. This object is in the action table rather than the queue table because Differentiated Services PHBs, such as the Assured Service, permit differently classified traffic to have different drop parameters even though they occupy the same queue.

OBJECT-TYPE

The max-threshold is the maximum permissible queue depth. In tail drop scenarios, the queue will drop if a packet is presented to it and it is instantaneously full by this measure. In random drop scenarios, the queue will drop if a packet is presented to it and the average queue depth exceeds the max-threshold. This object is in the action table rather than the queue table because Differentiated Services PHBs, such as the Assured Service, permit differently classified traffic to have different drop parameters even though they occupy the same queue.

OBJECT-TYPE

The drop policy applied to traffic.

OBJECT-TYPE

The number of Packets conforming to this meter. This object is used on high speed interfaces. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of Packets conforming to this meter. This object may be used on low speed interfaces, and represents the least significant 32 bits of diffServActionHCConformingPackets. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of octets conforming to this meter. This object is used on high speed interfaces. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of octets conforming to this meter. This object may be used on low speed interfaces, and represents the least significant 32 bits of diffServActionHCConformingOctets. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of packets conforming to this classifier and meter that have been dropped because either the meter always drops, or the queue's depth exceeds the max-threshold value. On high speed devices, this object implements the least significant 32 bits of diffServActionHCTailDrops . 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of packets conforming to this classifier and meter that have been dropped because either the meter always drops, or the queue's depth exceeds the max-threshold value. This object should be used on high speed interfaces. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of packets conforming to this classifier and meter that have been dropped by a random drop process because the queue is over-full. On high speed lines, this object reflects the least significant 32 bits of diffServActionHCRandomDrops. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The number of packets conforming to this classifier and meter that have been dropped by a random drop process because the queue is over-full. This object is used on high speed lines. 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 ifCounterDiscontinuityTime.

OBJECT-TYPE

The RowStatus variable controls the activation, deactivation, or deletion of a meter. Any writable variable may be modified whether the row is active or notInService.

OBJECT-TYPE

The Queue Table enumerates the queues on an interface. Queues are used to store traffic during intervals when the arrival rate exceeds the departure rate for a class of traffic. Because some PHBs indicate that the use of a priority queue may be advisable, each queue in this system is seen as having a priority. Those queues that share the same priority operate in what may externally appear to be a Weighted Round Robin manner, and preempt the traffic belonging to any lower priority. For this reason, it is strongly urged that traffic placed into prioritized queues be strongly policed to avoid traffic lockout. Queues in this table also have a minimum and a maximum rate. When a maximum rate is specified, the queue acts as a shaper if it has sufficient traffic and capacity is available. If it is a minimum rate, then the weight in the WRR is effectively set to this rate divided by the sum of the rates of queues on the interface, guaranteeing it at least that throughput rate. If it is a maximum rate, the queue operates as a shaper. A shaper potentially reduces the rate of traffic through it to the indicated rate, and minimizes variations in rate.

OBJECT-TYPE

An entry in the Queue Table describes a single FIFO queue.

OBJECT-TYPE

The number of the queue.

OBJECT-TYPE

The rate of the queue, in kilobits per second (KBPS). This unit is chosen because interfaces exist at the time of this writing which exceed the number of bits per second which may be represented in a 32 bit number. If the value is zero, then there is effectively no minimum rate. If the value is non-zero, the queue set will seek to assure this class of traffic at least this rate.

OBJECT-TYPE

The rate of the queue, in kilobits per second (KBPS). This unit is chosen because interfaces exist at the time of this writing which exceed the number of bits per second which may be represented in a 32 bit number. If the value is zero, then there is effectively no maximum rate. If the value is non-zero, the queue set will seek to assure this class of traffic at most this rate.

OBJECT-TYPE

The priority of the queue. If multiple queues exist on the same interface at the same priority, they are effectively given Weighted Round Robin service. If multiple priorities are configured on an interface, traffic with a numerically higher priority number is deemed to have higher priority than other traffic, and is preemptively serviced.

OBJECT-TYPE

The 'Next' pointer selects the successor TCB on the interface. Incoming traffic may use the value zeroDotZero in this variable to indicate that the packet is now to be routed; outbound traffic may use the same value to indicate that no subsequent queuing applies. Ingress interfaces generally use queuing either to divert routing traffic for speedier processing during a flap, or for shaping purposes.

OBJECT-TYPE

The amount, in the form of a factor, that the current, actual queue occupancy should influence the averaged queue occupancy. The averaged queue occupancy can be used for comparison to configured drop thresholds in RED or RED-like dropper implementations. Larger the weight, the greater the instantaneous queue occupancy influences the averaged queue occupancy. Usually, dramatic changes in the instantaneous queue occupancy is the result of bursty input streams. Notice this numeric attribute is divided by 10,000 to get the effective fractional factor used in the actual calculations.

OBJECT-TYPE

The RowStatus variable controls the activation, deactivation, or deletion of a queue. Any writable variable may be modified whether the row is active or notInService.

OBJECT-IDENTITY