EX2500 Ethernet Switch Configuration Guide
62 Using DSCP Values to Provide QoS
QoS Levels
Table 16 shows the default service levels provided by the switch, listed from
highest to lowest importance.
DSCP Mapping
The switch can use the DSCP value of ingress packets to set the COS queue. Use the
following command to view the default settings:
ex2500(config)# show qos dscp
DSCP CoS Queue
-------- ---------
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
9 1
10 1
...
54 6
55 6
56 7
57 7
58 7
59 7
60 7
61 7
62 7
63 7
Use the following command to turn on DSCP re-marking globally:
ex2500# qos dscp enable
Use the following command to perform DSCP mapping:
ex2500# qos dscp transmit-queue <DSCP value (0-63)> <COSq (0-7)>
Table 16: Default QoS Service Levels
Service Level Default PHB 802.1p Priority
Critical CS7 7
Network Control CS6 6
Premium EF, CS5 5
Platinum AF41, AF42, AF43, CS4 4
Gold AF31, AF32, AF33, CS3 3
Silver AF21, AF22, AF23, CS2 2
Bronze AF11, AF12, AF13, CS1 1
Standard DF, CS0 0
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