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Troubleshooting Guide

CloudEngine 16800, 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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FCoE Service Is Unavailable Though DCB Negotiation Is Successful

FCoE Service Is Unavailable Though DCB Negotiation Is Successful

Fault Symptom

DCB negotiation is successful, but the DCB status is FAILED and the FCoE service is unavailable.

Possible Causes

  • The APP-TLV is prohibited.

  • The FCoE or FIP service priority is not configured in the APP profile.

  • PFC is not enabled for queues with a priority.

Troubleshooting Roadmap

Check whether DCB parameters are configured correctly.

Procedure

  1. Run the display dcb status verbose command in the diagnostic view to check the APP-TLV configuration. If there is no APP-TLV configuration, the APP-TLV uses the default value or is prohibited.

    By default, the priorities of FCoE and FIP services are both 3, and the ISCSI service priority is 4.

  2. Run the display this command in the interface view to check whether the APP-TLV is prohibited.

    • If the APP-TLV is prohibited, run the undo dcb app-profile disable command to enable the APP profile or run the dcb app-profile enable app-profile-name command to load the APP profile.

    • If the APP-TLV is not prohibited, perform step 3.

  3. Run the display dcb app-profile command to check whether FCoE and FIP service priorities are configured in the APP profile.

    • If the FCoE or FIP service priority is not configured, run the dcb app-profile command to enter the APP profile view and run the application priority command in the APP profile view to set the service priority in the APP-TLV.

    • If FCoE and FIP service priorities are configured, go to step 4.

  4. Run the display dcb pfc-profile command to check whether PFC is enabled for queues with a priority.

    • If PFC is not enabled for queues with a priority, run the dcb pfc command to enter the PFC profile view and run the priority (PFC) command in the PFC profile view to enable PFC for queues with a priority.

    • If PFC is enabled for queues with a priority, the process ends.

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Updated: 2020-01-07

Document ID: EDOC1000060766

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