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ME60 Troubleshooting Guide V1.0 (VRPv8)

This document provides the maintenance guide of the device, including daily maintenance, emergence maintenance, and typical troubleshooting.
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802.1p-Based BA Classification Troubleshooting

802.1p-Based BA Classification Troubleshooting

This chapter describes common causes of 802.1p-based BA classification faults and provides troubleshooting flowcharts and procedures, alarms, and logs to help identify and rectify these faults.

Common Causes

This section describes common causes for an 802.1p-based BA classification fault.

Common causes are as follows:

  • The priority mapping in the domain of the inbound interface is incorrect.

  • The priority mapping in the domain of the outbound interface is incorrect.

  • The inbound or outbound interface is not a sub-interface.

  • The inbound or outbound interface is not enabled to trust the 802.1p values of packets.

Troubleshooting Flowchart

This section describes the troubleshooting flowchart for 802.1p-based BA classification.

Figure 4-112 shows a typical networking scheme for BA classification.

Figure 4-112 Networking for 802.1p-based BA classification

NOTE:

Interfaces 1 through 2 and subinterfaces1 through 2 are GE 1/0/1, GE 6/0/2, GE 1/0/1.1, GE 3/0/1.1, and GE 1/0/1, respectively.

On the network shown in Figure 4-112, Device A sends an IP packet with the DSCP value of 10. The IP packet reaches GE 3/0/1.1 on Device C through Device B, with the DSCP value being mapped to an incorrect 802.1p value.

Figure 4-113 shows the troubleshooting flowchart.

Figure 4-113 Troubleshooting for 802.1p-based BA classification

Troubleshooting Procedure

This section describes the troubleshooting procedure for 802.1p-based BA classification.

NOTE:

After the commands are configured to troubleshoot the faults, check the configuration validation mode to ensure that the configurations take effect. Unless otherwise specified, this manual defaults to immediate validation mode.

  • In immediate validation mode, the configurations take effect after the commands are entered.
  • In two-phase validation mode, after the commands are configured, the commit command needs to be run to commit the configurations.

Save the results of each troubleshooting step so that if your troubleshooting attempts fail to correct the fault, you will have a record of your actions to present to Huawei.

Procedure

  1. Check that the priority mapping on the interface sending the packet GE 6/0/2 on ME device B is correct.

    Run the display this command on GE 6/0/2 of ME device B to check the configuration of trust upstream ds-domain-name command.

    • If the non-default domain is not configured in the trust upstream ds-domain-name command, run the display diffserv domain ds-domain-name command in any view to check whether the priority mapping in the domain is correct.

    • If the trust upstream default command is configured, run the display diffserv domain default command in any view to check whether the priority mapping in the default domain is correct. If not, re-configure the priority mapping in the domain.

  2. Check that the priority mapping on the interface receiving the packet GE 3/0/1.1 on ME device C is correct.

    Run the display this command on GE 3/0/1.1 of ME device C to check the configuration of trust upstream ds-domain-name.

    • If the non-default domain is not configured in the trust upstream ds-domain-name command, run the display diffserv domain ds-domain-name command in any view to check whether the priority mapping in the domain is correct.

    • If the trust upstream default command is configured, run the display diffserv domain default command in any view to check whether the priority mapping in the default domain is correct. If not, re-configure the priority mapping in the domain.

  3. Check that the interface receiving the packet GE 3/0/1.1 on ME device C is enabled to trust the 802.1p values of packets.

    Run the display this command on GE 3/0/1.1 of ME device C to check whether the trust 8021p command is configured. If not, configure this command.

Relevant Alarms and Logs

This section describes relevant alarms and logs for 802.1p-based BA classification.

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Updated: 2019-06-11

Document ID: EDOC1000175918

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