Avaya G250 Administration page 461

QoS rules on the list take precedence over the DSCP table. If a QoS rule other than the default
matches the packet, the G350 does not apply the DSCP table to the packet. The G250/G350
applies only the operation specified in the QoS rule.
To change an entry in the DSCP table:
1. Enter the context of a QoS list.
2. Type the command dscp-table, followed by the number of the DSCP value for which you
want to change its composite operation.
3. Type the command composite-operation, followed by the name of the composite
operation you want to execute for packets with the specified DSCP value.
The following commands specify the pre-configured composite operation CoS5 for DSCP table
entry 33 in QoS list 401. Every packet with DSCP equal to 33 is assigned CoS priority 5.
G350-001# ip qos-list 401
G350-001(QoS 401)# dscp-table 33
G350-001(QoS 401/dscp 33)# composite-operation CoS5
Done!
The following commands create a new composite operation called dscp5 and assign the new
composite operation to DSCP table entry 7 in QoS list 402. Every packet with DSCP equal to 7
is assigned a new DSCP value of 5.
G350-001(super)# ip qos-list 402
G350-001(super/QoS 402)# composite-operation 12
G350-001(super/QoS 402/CompOp 12)# name dscp5
Done!
G350-001(super/QoS 402/CompOp 12)# dscp 5
Done!
G350-001(super/QoS 402/CompOp 12)# cos No-Change
Done!
G350-001(super/QoS 402/CompOp 12)# exit
G350-001(super/QoS 402)# dscp-table 7
G350-001(super/QoS 402/dscp 7)# composite-operation dscp5
Done!
This change has the effect of changing the mapping of packets entering the router with a DSCP
of 7. DSCP value 5 is most likely to be mapped to a different CoS, making these packets subject
to a different set of behavioral rules.
DSCP table
Issue 1.1 June 2005 461