Dell PowerConnect B-FCXs, Configuration Manual

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PowerConnect B-Series FCX Configuration Guide 601
53-1002266-01
Configuring the QoS mappings
17
1
You can change the DSCP to internal forwarding mappings. You also can change the internal forwarding priority to
hardware forwarding queue mappings.
Changing the DSCP to internal forwarding
priority mappings
To change the DSCP to internal forwarding priority mappings for all the DSCP ranges, enter
commands such as the following at the global CONFIG level of the CLI.
PowerConnect(config)#qos-tos map dscp-priority 0 2 3 4 to 1
PowerConnect(config)#qos-tos map dscp-priority 8 to 5
PowerConnect(config)#qos-tos map dscp-priority 16 to 4
PowerConnect(config)#qos-tos map dscp-priority 24 to 2
PowerConnect(config)#qos-tos map dscp-priority 32 to 0
PowerConnect(config)#qos-tos map dscp-priority 40 to 7
PowerConnect(config)#qos-tos map dscp-priority 48 to 3
PowerConnect(config)#qos-tos map dscp-priority 56 to 6
Syntax: [no] qos-tos map dscp-priority <dscp-value> [ <dscp-value> ...] to <priority>
The <dscp-value> [ <dscp-value> ...] variable specifies the DSCP value ranges you are remapping.
You can specify up to eight DSCP values in the same command, to map to the same forwarding
priority. For example
PowerConnect(config)#qos-tos map dscp-priority 1 2 3 4 5 6 7 8 to
6.
The <priority> variable specifies the internal forwarding priority.
The first command in the example maps priority 1 to DSCP values 0, 2, 3, and 4.
These commands configure the mappings displayed in the DSCP to forwarding priority portion of
the QoS information display. To read this part of the display, select the first part of the DSCP value
from the d1 column and select the second part of the DSCP value from the d2 row. For example, to
read the DSCP to forwarding priority mapping for DSCP value 24, select 2 from the d1 column and
select 4 from the d2 row. The mappings that are changed by the command above are shown below
in bold type.
TABLE 100 Default mappings of internal forwarding priority values
Internal forwarding priority Forwarding queues
0 (lowest priority queue) qosp0
1
1
qosp1
2 qosp2
3 qosp3
4 qosp4
5 qosp5
6 qosp6
7 (highest priority queue) qosp7