Port-Groups: TxQ Configuration

TxQ Port-Groups contain user settings for specific types of ports and their matching transmit queue settings. Port groups 0.0 and 0.1 exist by default for the S- and K-Series, and port group 0.0 exists by default for the 7100-Series. New port groups can be configured with a name and ports can be added according to device port-type. Transmit queue behavior can also be configured per port group; default port-groups are configured in strict priority queuing mode. Additional port groups also default to strict priority queuing mode, though each TxQ port group can be configured for weighted-fair queuing if desired.

The show cos port-config txq command displays all configured TxQ port-groups. Group name and type are displayed as well as ports associated with the port group. For show cos port-config txq output, arbiter mode (TxQ mode) is displayed along with a picture of the supported queues and the number of slices allotted to the group. Queuing is also displayed by percentage.

The following example displays default values for the show cos port-config txq command S- and K-Series output (S-, K-Series):

System(rw)->show cos port-config txq
 * Percentage/queue (if any) are approximations based on
   [(slices/queue) / total number of slices]
Transmit Queue Port Configuration Entries
----------------------------------------------------------------------
Port Group Name  :S-Series 11Q
Port Group       :0
Port Type        :0
Assigned Ports   :ge.2.1-48,101-112;ge.4.1-48;tg.4.201-204
Arbiter Mode     :Low Latency Queue
Slices/queue     :Q [0]: LLQ  Q [1]:   0  Q [2]:   0  Q [3]:   0
                 :Q [4]:   0  Q [5]:   0  Q [6]:   0  Q [7]:   0
                 :Q [8]: 100  Q [9]: LLQ  Q [10]: LLQ
Percentage/queue :Q [0]: LLQ  Q [1]:   0% Q [2]:   0% Q [3]:   0%
                 :Q [4]:   0% Q [5]:   0% Q [6]:   0% Q [7]:   0%
                 :Q [8]: 100% Q [9]: LLQ  Q [10]: LLQ
----------------------------------------------------------------------

The following example displays default values for the show cos port-config txq command 7100-Series output (7100-Series):

System(rw)->show cos port-config txq
 * Percentage/queue (if any) are approximations based on
   [(slices/queue) / total number of slices]
Transmit Queue Port Configuration Entries
----------------------------------------------------------------------
Port Group Name  :TOR-Series 8Q
Port Group       :0
Port Type        :0
Assigned Ports   :tg.1.1-48;fg.1.1-4
Arbiter Mode     :Strict
Slices/queue     :Q [ 0]:   0  Q [ 1]:   0  Q [ 2]:   0  Q [ 3]:   0
                 :Q [ 4]:   0  Q [ 5]:   0  Q [ 6]:   0  Q [ 7]: 100
Percentage/queue :Q [ 0]:   0% Q [ 1]:   0% Q [ 2]:   0% Q [ 3]:   0%
                 :Q [ 4]:   0% Q [ 5]:   0% Q [ 6]:   0% Q [ 7]: 100%
----------------------------------------------------------------------

Additional port groups can be created using the set cos port-config txq command. Name and associated ports can be configured, as well as TxQ settings. You need to:

• Identify the port-group for configuration
• Optionally, specify port-group Name, associated ports, and arb-percentage or arb-slices