Avaya G430 Manual page 578

Policy lists
Multiple DSCP values can be mapped to a single CoS. Rules can also be applied to individual
DSCP values.
The default value of DSCP in a packet is 0, which is defined as "best-effort." You can determine
a higher priority for a traffic type by changing the DSCP value of the packet using a QoS rule
or composite operation.
Each QoS list includes a DSCP table. A DSCP lists each possible DSCP value, from 0 to 63.
For each value, the list specifies a composite operation. See
operations for QoS lists
QoS rules on the list take precedence over the DSCP table. If a QoS rule other than the default
matches the packet, the Branch Gateway does not apply the DSCP table to the packet. The
Branch Gateway applies only the operation specified in the QoS rule.
Related topics:
Changing an entry in the DSCP table
Changing an entry in the DSCP table
Procedure
1. Enter the context of a QoS list.
2. Enter dscp-table followed by the number of the DSCP value for which you want
3. Enter composite-operation followed by the name of the composite operation
Result
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.
Gxxx-001# ip qos-list 401
Gxxx-001(QoS 401)# dscp-table 33
Gxxx-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.
Gxxx-001(super)# ip qos-list 402
Gxxx-001(super/QoS 402)# composite-operation 12
Gxxx-001(super/QoS 402/CompOp 12)# name dscp5
Done!
Gxxx-001(super/QoS 402/CompOp 12)# dscp 5
Done!
Gxxx-001(super/QoS 402/CompOp 12)# cos No-Change
Done!
Gxxx-001(super/QoS 402/CompOp 12)# exit
Gxxx-001(super/QoS 402)# dscp-table 7
578 Administering Avaya G430 Branch Gateway
on page 575.
to change its composite operation.
you want to execute for packets with the specified DSCP value.
Comments? infodev@avaya.com
on page 578
Pre-configured composite
October 2013