Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 36)

On FCX and ICX devices, you can use QoS queue 1 for priority traffic, even when sFlow is enabled on
the port. This differs from the FastIron X Series devices, which support seven priorities for user data
instead of eight when sFlow is enabled. QoS queue 1 is reserved for sFlow and not used by other
packets. Any non-sFlow packets assigned to QoS queue 1 will be directed to QoS queue 0. Note that
the ICX 6430 does not support sFlow.
The following table lists the default mappings of internal forwarding priority values to the hardware
forwarding queues for the ICX 6430.
Default mappings of internal forwarding priority values for the ICX 6430 TABLE 20
Internal forwarding priority Forwarding queues
0 (lowest priority queue) qosp0
1 qosp0
2 qosp1
3 qosp1
4 qosp1
5 qosp2
6 qosp2
7 (highest priority queue) qosp3
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.
device(config)#qos-tos map dscp-priority 0 2 3 4 to 1
device(config)#qos-tos map dscp-priority 8 to 5
device(config)#qos-tos map dscp-priority 16 to 4
device(config)#qos-tos map dscp-priority 24 to 2
device(config)#qos-tos map dscp-priority 32 to 0
device(config)#qos-tos map dscp-priority 40 to 7
device(config)#qos-tos map dscp-priority 48 to 3
device(config)#qos-tos map dscp-priority 56 to 6
device(config)#qos-tos map dscp-priority 56 t
Use the following command to map priority levels to DSCP values.
Syntax: [no] qos-tos map dscp-priority dscp-value1 dscp-value2 dscp-value3 dscp-value4 dscp-
value5 dscp-value6 dscp-value7 dscp-value8 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.
The priority variable specifies the internal forwarding priority.
Changing the DSCP to internal forwarding priority mappings
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