Dell PowerConnect B-RX - Configuring the Qos Mappings; Changing the Cos -> DSCP Mappings; Changing the DSCP -> DSCP Mappings

BigIron RX Series Configuration Guide 483
53-1002253-01
Configuring the QoS mappings
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Configuring the QoS mappings
The Brocade device maps a packet’s 802.1p or DSCP value to an internal forwarding priority. The
default mappings are listed in Table 91 through Table 94. You can change the following mappings
as described in this section:
• CoS –> DSCP
• DSCP –> DSCP
• DSCP –> internal forwarding priority
• CoS –> internal forwarding priority
The mappings are globally configurable and apply to all interfaces.
NOTE
In a configuration where you have marking enabled with the trust level set to CoS, you must enter
the ip rebind-acl all command at the global CONFIG level of the CLI after making the mapping
change. This applies to mappings that are configured using the qos-tos map command.
NOTE
The mappings are globally configurable and apply to all interfaces.
Changing the CoS –> DSCP mappings
The 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 global
CONFIG level of the CLI.
BigIron RX(config)# qos-tos map cos-dscp 0 33 25 49 17 7 55 41
BigIron RX(config)# ip rebind-acl all
This command configures the mappings displayed in the COS-DSCP map portion of the QoS
information 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 41
Syntax: [no] qos-tos cos-dscp <dscp0> <dscp1> <dscp2> <dscp3> <dscp4> <dscp5> <dscp6>
<dscp7>
The <dscp0> through <dscp7> parameters specify the DSCP values you are mapping the eight CoS
values to. You must enter DSCP values for all eight CoS values, in order from CoS value 0 – 7.
Changing the DSCP –> DSCP mappings
The DSCP –> DSCP mappings are used when DSCP trust level and DSCP marking are enabled. To
change a DSCP –> DSCP mapping, enter a command such as the following at the global CONFIG
level of the CLI.