Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring policy●●●CoS — the operation sets the Ethernet IEEE 802.1p CoS field in the packet to the valuelisted in this columnDSCP — the operation sets the DSCP field in the packet to the value listed in this columnTrust — determines how to treat packets that have been tagged by the originator or othernetwork devices. If the composite operation is set to Trust-DSCP, the packet’s CoS tag isset to 0 before the QoS list rules and DSCP map are executed. If the composite operationis set to CoSX, the DSCP map is ignored, but the QoS list rules are executed on theEthernet IEEE 802.1p CoS field. (For example, the composite operation CoS3 changesthe CoS field to 3). If the composite operation is set to Trust-DSCP-CoS, the operationuses the great of the CoS or the DSCP value. If the composite operation is set to NoChange, the operation makes no change to the packet’s QoS tags.Configuring composite operationsYou can configure additional composite operations for QoS lists. You can also edit compositeoperations that you configured. You cannot edit pre-configured composite operations.Note:Note: You cannot configure additional composite operations for access control lists,since all possible composite operations are pre-configured.To create or edit a composite operation:1. Enter the context of a QoS list.2. Type the composite-operation command, followed by an index number. The numbermust be 12 or higher, since numbers 1 through 11 are assigned to pre-configured lists.3. Use one or more of the following commands to set the parameters of the compositeoperation:- dscp — determines the value to which the rule resets the packet’s DSCP field. To ignorethe DSCP field, use the argument no change, or use the command no dscp.- cos — determines the value to which the rule resets the packet’s CoS field. To ignore theCoS field, use the argument no change, or use the command no cos.4. Use the name command, followed by a text string, to assign a name to the compositeoperation. You must assign a name to the composite operation, because when you attachthe composite operation to a rule, you use the name, not the index number, to identify thecomposite operation.268 Administration of the Avaya G350 Media Gateway