Changing The Dscp –> Dscp Mappings - Dell PowerConnect B-RX Configuration Manual

18
Configuring the QoS mappings
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:
---------------------------------------------------------
Syntax: [no] qos-tos cos-dscp <dscp0> <dscp1> <dscp2> <dscp3> <dscp4> <dscp5> <dscp6>
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.
BigIron RX(config)# qos-tos map dscp-dscp 0 to 10
This command changes the mapping of DSCP value 0 to 10.
Syntax: [no] qos-tos map dscp-dscp <old-dscp-value> [<old-dscp-value>...]
You can change up to seven DSCP values in the same commend.
Changing the DSCP –> internal forwarding priority mappings
This mapping is used when the trust level is set to DSCP. In addition to determining the
internal-forwarding priority of a packet, the value also determines the outbound 802.1p value if
CoS marking is enabled. To change the DSCP –> internal forwarding priority mappings for all the
DSCP ranges, enter commands such as the following at the global CONFIG level of the CLI.
BigIron RX(config)# qos-tos map dscp-priority 0 2 3 4 to 1
BigIron RX(config)# qos-tos map dscp-priority 8 to 5
BigIron RX(config)# qos-tos map dscp-priority 16 to 4
BigIron RX(config)# qos-tos map dscp-priority 24 to 2
BigIron RX(config)# qos-tos map dscp-priority 32 to 0
BigIron RX(config)# qos-tos map dscp-priority 40 to 7
BigIron RX(config)# qos-tos map dscp-priority 48 to 3
BigIron RX(config)# qos-tos map dscp-priority 56 to 6
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.
BigIron RX(config-if-e10000-1/1)# show qos-tos
472
COS: 0 1 2 3
dscp: 0 33 25 49 17
<dscp7>
to <new-dscp-value>
4 5 6 7
7 55 41
BigIron RX Series Configuration Guide
53-1001810-01