Configure Virtual Output Queuing

Note

This feature is supported only on devices based on Extreme 8820, SLX 9740, SLX 9640, and SLX 9540.

Access global configuration mode.
```
device# configure terminal
```
Access interface configuration mode.
```
device(config)# interface ethernet 0/2
```
Use the traffic class to set parameters for unicast packet handling on the interface.
```
device(conf-if-eth-0/2)# qos rx-queue unicast traffic-class 3 min-queue-size 128 max-queue-size 1024
```
This example sets the values for the traffic class value, with a range of 0 through 7; minimum queue size, with a range of 0 through 1024 KB per-second (KBps); and the maximum queue size, with a range of 0 through 2048 MB per-second (MBps).
Use the traffic class to set parameters for multicast packet handling on the interface.
1. Configure multicast data best effort rate.
```
device(conf-if-eth-0/2)# qos rx-queue multicast best-effort-rate 3000
```
  The range of values is from 0 through 600000000 kilobits per-second (kbps).
2. Configure multicast data guarantee rate.
```
device(conf-if-eth-0/2)# qos rx-queue multicast guarantee-rate 30000
```
  The range of values is from 0 through 600000000 kbps.
3. Set parameter values, by traffic class, for multicast packet handling on the interface.
```
device(conf-if-eth-0/2)# qos rx-queue multicast traffic-class 3 min-queue-size 512 max-queue-size 1024
```
Return to privileged EXEC mode.
```
device(conf-if-eth-0/2)# end
```

Verify the configuration.

device# show qos rx-queue interface all

device# show running-config | include queue
qos rx-queue queue-size 512

View the buffer pool statistics.
```
device# show buffmgr stats slot 0
```
Save the running-config file to the startup-config file.
```
device# copy running-config startup-config
```

This example summarizes the commands in this procedure.

device# configure terminal
device(config)# interface ethernet 0/2
device(conf-if-eth-0/2)# qos rx-queue unicast traffic-class 3 min-queue-size 128 max-queue-size 1024
device(conf-if-eth-0/2)# qos rx-queue multicast best-effort-rate 3000
device(conf-if-eth-0/2)# qos rx-queue multicast guarantee-rate 30000
device(conf-if-eth-0/2)# qos rx-queue multicast traffic-class 3 min-queue-size 512 max-queue-size 1024
device(conf-if-eth-0/2)# end
device# show qos rx-queue interface all
device# copy running-config startup-config