H3C S9500 Series Operating Manual page 10

Operation Manual – QoS
H3C S9500 Series Routing Switches
mapping table to obtain the CoS value and searches the CoS-to-drop precedence
mapping table to obtain the drop precedence for the packet.
Note:
To assign a local precedence to the tagged packets received on a port based on the
802.1p field, you must assign a local precedence (or port priority) with the priority
command to the port instead of using the default port priority, that is, 0.
A tagged packet received on a port will be assigned a local precedence based on its
802.1p if the local precedence of the port is not zero or if the traffic-priority
command is configured to have the system to do so.
If the CoS-to-local precedence mapping table is modified, you need to re-assign a
local precedence to each port for the new mapping table to take effect on untagged
packets.
I. Configuring mapping tables
Perform the following configurations in system view.
Configure the CoS-to-drop
precedence mapping table
Restore the default values of
CoS-to-drop precedence mapping
table
Configure the CoS-to-local
precedence mapping table
Restore the default values of
CoS-to-local precedence mapping
table
By default, the switch uses the default mapping tables to assign drop precedence and
local precedence to received packets.
II. Configuring local precedence on a port
Perform the following configurations in Ethernet port view.
To do...
1-8
Chapter 1 QoS Configuration
Use the command...
qos cos-drop-precedence-map
cos0-map-drop-prec cos1-map-drop-prec
cos2-map-drop-prec cos3-map-drop-prec
cos4-map-drop-prec cos5-map-drop-prec
cos6-map-drop-prec cos7-map-drop-prec
undo qos cos-drop-precedence-map
qos cos-local-precedence-map
cos0-map-local-prec cos1-map-local-prec
cos2-map-local-prec cos3-map-local-prec
cos4-map-local-prec cos5-map-local-prec
cos6-map-local-prec cos7-map-local-prec
undo qos cos-local-precedence-map