Traffic Management Counter Types

Two counter types apply to traffic management.

Device counter

Device-level counters track packet counts per chip. Ingress counters keep track of the following:

• Number of ingress packets
• IQM enqueued and dequeued packets and bytes
• Total discard packets
• Total deleted packet
• Packets destined to invalid queues (those dropped by the traffic management)

Egress counters keep track of the following:

• Discarded unicast packets counter
• Discarded multicast packets
• EGQ packets

The polling time for traffic management device statistics is 10 seconds.

VOQ counter

This counter counts the packets that are enqueued or discarded for a VOQ.

For SLX devices, 16,000 VOQs statistics are available, out of which 15,000 are used to track VOQ traffic for each egress port. Entries for the TM VOQ counter engine are 1:1 mapped to the VOQs. Each VOQ ID directly results in a counter engine statistics ID and points to the counter set of the engine associated with the VOQ.

The polling time for traffic management VOQ statistics is 4 minutes.