ECS4660-28F_Management Guide-R03

C HAPTER 41 | Class of Service Commands
Priority Commands (Layer 3 and 4)
– 1396 –
COMMAND MODE
Interface Configuration (Port)
COMMAND USAGE
◆ Enter a CoS/CFI value pair, followed by the keyword “from” and then
four internal per-hop behavior and drop precedence value pairs
separated by spaces.
◆ If the packet is forwarded with an 8021.Q tag, the priority value in the
egress packet is modified based on the table shown above, or on
similar values as modified by this command.
EXAMPLE
Console(config)#interface ethernet 1/5
Console(config-if)#qos map dscp-cos 1 0 from 1 2
Console(config-if)#
qos map
dscp-mutation
This command maps DSCP values in incoming packets to per-hop behavior
and drop precedence values for priority processing. Use the no form to
restore the default settings.
SYNTAX
qos map dscp-mutation phb drop-precedence from dscp0 ... dscp7
no qos map dscp-mutation dscp0 ... dscp7
phb - Per-hop behavior, or the priority used for this router hop.
(Range: 0-7)
drop-precedence - Drop precedence used for in controlling traffic
congestion. (Range: 0 - Green, 3 - Yellow, 1 - Red)
dscp - DSCP value in ingress packets. (Range: 0-63)
5 (5,0) (5,0) (5,0)
6 (6,0) (6,0) (6,0)
7 (7,0) (7,0) (7,0)
Table 177: Mapping Internal PHB/Drop Precedence to CoS/CFI Values
Drop Precedence
Per-hop Behavior
0 (green) 1 (red) 3 (yellow)