BigIron RX Series Configuration Guide 48353-1002253-01Configuring the QoS mappings 18Configuring the QoS mappingsThe Brocade device maps a packet’s 802.1p or DSCP value to an internal forwarding priority. Thedefault mappings are listed in Table 91 through Table 94. You can change the following mappingsas described in this section:• CoS –> DSCP• DSCP –> DSCP• DSCP –> internal forwarding priority• CoS –> internal forwarding priorityThe mappings are globally configurable and apply to all interfaces.NOTEIn a configuration where you have marking enabled with the trust level set to CoS, you must enterthe ip rebind-acl all command at the global CONFIG level of the CLI after making the mappingchange. This applies to mappings that are configured using the qos-tos map command.NOTEThe mappings are globally configurable and apply to all interfaces.Changing the CoS –> DSCP mappingsThe CoS –> DSCP mappings are used if the trust level is CoS and DSCP marking is enabled.To change the CoS –> DSCP mappings, enter commands such as the following at the globalCONFIG level of the CLI.BigIron RX(config)# qos-tos map cos-dscp 0 33 25 49 17 7 55 41BigIron RX(config)# ip rebind-acl allThis command configures the mappings displayed in the COS-DSCP map portion of the QoSinformation display.BigIron RX(config-if-e10000-1/1)# show qos-tos...portions of table omitted for simplicity...COS-DSCP map:COS: 0 1 2 3 4 5 6 7---------------------------------------------------------dscp: 0 33 25 49 17 7 55 41Syntax: [no] qos-tos cos-dscp The through parameters specify the DSCP values you are mapping the eight CoSvalues to. You must enter DSCP values for all eight CoS values, in order from CoS value 0 – 7.Changing the DSCP –> DSCP mappingsThe DSCP –> DSCP mappings are used when DSCP trust level and DSCP marking are enabled. Tochange a DSCP –> DSCP mapping, enter a command such as the following at the global CONFIGlevel of the CLI.
