CoS TxQ Reference Mapping

The CoS TxQ reference table uses 16 indexes or virtual queues, and maps each to a physical queue or resource. A TxQ reference table exists for each port group configured and is indexed similarly to port-resources, as port-group.port-type reference. For port-types with 16 queues, the 16-txq reference indexes map directly to the 16 physical queues. For port-types with 4 queues, the 16-txq reference indexes map:

virtual queues 12-15 to physical queue 3
virtual queues 8-11 map to physical queue 2
virtual queues 4-7 map to physical queue 1
virtual queues 0-3 map to physical queue 0

The TxQ reference table can be displayed using the show cos reference txq command and displays port-group, reference index, and physical queue.

The following example displays default values for the show cos reference txq command S- and K-Series output:

System(rw)->show cos reference txq
Group Index Reference Type    Queue
----------- --------- ---- ------------
0.0         0         txq  0
0.0         1         txq  1
0.0         2         txq  2
0.0         3         txq  3
0.0         4         txq  4
0.0         5         txq  5
0.0         6         txq  6
0.0         7         txq  7
.
.
.
0.2         10        txq  5
0.2         11        txq  5
0.2         12        txq  6
0.2         13        txq  6
0.2         14        txq  7
0.2         15        txq  7

Although the TxQ reference table is populated by default, the Queue-to-Reference mapping can be configured using the set cos reference txq command. You need to: