3Com Switch 4500 Family Manual page 520

802.1p priority (in words)
video
voice
network-management
local-precedence pre-value: Sets the local precedence. The pre-value argument ranges from 0 to 7.
Description
Use the traffic-priority command to configure priority marking on a port.
Use the undo traffic-priority command to remove the priority marking configuration.
This command is used to set precedence for traffic matching a specified ACL rule:
If 802.1p priority marking is configured, the traffic will be mapped to the local precedence
corresponding to the re-marked 802.1p priority and assigned to the output queue corresponding to
the local precedence.
If local precedence marking is configured, the traffic will be assigned to the output queue
corresponding to the re-marked local precedence.
If IP precedence or DSCP marking is configured, the traffic will be marked with new IP precedence
or DSCP precedence.
Do not configure 802.1p priority marking and local precedence marking for the same traffic. With
802.1p priority marking, the new 802.1p priority will be mapped to a local precedence automatically. If
local precedence marking is also configured, there will be two local precedence values for the traffic,
resulting in conflict. In this case, the device will display an error prompt.
Related commands: display qos-interface traffic-priority.
Examples
# Set the 802.1p priority of the inbound packets with 802.1p priority 5 to 1 on Ethernet 1/0/1.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] acl number 4000
[Sysname-acl-ethernetframe-4000] rule permit cos 5
[Sysname-acl-ethernetframe-4000] quit
[Sysname] interface Ethernet 1/0/1
[Sysname-Ethernet1/0/1] traffic-priority inbound link-group 4000 cos 1
# Set the DSCP precedence of inbound DNS protocol packets to 16 (corresponding to the cs2 keyword)
on Ethernet 1/0/1.
802.1p priority (in digits)
5
6
7
1-23