The physical layer is already up, but the link layer protocol is down

Symptom

The physical layer is already up, but the link layer protocol is down.

Solution

To resolve this problem:

  1. Verify that Frame Relay is enabled on the peer devices.

  2. Verify that one end is in DTE mode and the other end is in DCE mode if the two devices are directly connected.

  3. Verify that both ends are using the same LMI protocol.

  4. Execute the debugging lmi command to identify whether one status message is received for each status enquiry message. If not, examine the physical layer.

  5. If the problem persists, contact Hewlett Packard Enterprise Support.