l If the type of the priority trusted by the inbound interface is correct, go to step 2.
Step 2 Check whether priority mappings are correct.
The AR2200-S sends packets to queues based on the internal priority; therefore, check the
mappings between packet priorities (DSCP, or 802.1p priorities) trusted by the interface and
internal priorities.
Run the display qos map-table command to check whether priority mappings in the priority
mapping table are correct.
l If not, run the qos map-table command to enter the priority mapping table view and run the
input command to configure the priority mappings correctly.
l If yes, go to step 3.
Step 3 Check whether there are configurations affecting the queues that packets enter on the inbound
interface.
1. Check whether traffic policing defining the re-marking action is configured on the inbound
interface.
Run the display this command in the view of the inbound interface to check whether the
qos car inbound command with remark-8021p or remark-dscp configured has been
used.
l If yes, cancel the re-marking action or run the undo qos car inbound command to
cancel traffic policing.
l If not, go to step b.
2. Check whether the traffic policy defining the re-marking action is configured in the inbound
direction on the inbound interface.
Run the display this command in the view of the inbound interface to check whether the
traffic-policy inbound command has been used.
l If the traffic-policy inbound command has been used, run the display traffic-policy
applied-record command to check the traffic policy record and the traffic behavior in
the traffic policy. If the traffic policy is applied successfully, run the display traffic
behavior user-defined command to check whether the traffic behavior defines the re-
marking action (remark 8021p or remark dscp), or remark local-precedence.
– If the traffic behavior contains the re-marking action, delete the re-marking action
from the traffic behavior or delete the traffic policy from the interface.
– If the traffic policy fails to be applied or the traffic behavior does not contain the re-
marking action, go to step c.
l If the traffic-policy inbound command is not used, go to step c.
3. Check whether the traffic policy defining the queuing action is configured in the outbound
direction on the outbound interface.
Run the display this command in the view of the inbound interface to check whether the
traffic-policy outbound command has been used.
l If the traffic-policy outbound command has been used, run the display traffic-policy
applied-record command to check the traffic policy record and the traffic behavior in
the traffic policy. If the traffic policy is applied successfully, run the display traffic
behavior user-defined command to check the traffic behavior configuration.
– If the display traffic behavior user-defined command output contains Assured
Forwarding, Expedited Forwarding, or Flow based Weighted Fair Queuing, the
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 9 QoS
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
239
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