Seeing "Excessive MAC Move Messages in /var/log/xvnd.log files on the Fabric Director or in the xvnd.logs in the Fabric Director Diagnostic Log Bundle

Asset ID:	1-72-1516481.1
Update Date:	2017-07-11
Keywords:

Solution Type Problem Resolution Sure

Solution 1516481.1 : Seeing "Excessive MAC Move Messages in /var/log/xvnd.log files on the Fabric Director or in the xvnd.logs in the Fabric Director Diagnostic Log Bundle

Applies to:

Oracle Fabric Interconnect F1-15 - Version All Versions and later
Oracle Fabric Interconnect F1-4 - Version All Versions and later
Information in this document applies to any platform.

Symptoms

Seeing excessive MAC moves in Fabric Director /var/log/xvnd.log files.

Cause

There are multiple possible causes for this issue. Please see detailed list below

Solution

MAC moves can occur for the following reasons:

1. Misconfiguration of LAG.

2. Could have bad ethernet cable in the LAG.

3. Could have bad port either on ethernet switch or Fabric Director.

4. In ESX host MAC moves can occur because of duplicate MAC at the ESX host level (if more than one VM has same MAC).

Troubleshooting possible misconfiguration of LAG.

1. Run "show lag" from the director. Note static or LACP LAG also note all ports used in LAG.

Get the upstream switch port LAG configuration, note if LAG is configured for LACP or static. Also note ports in LAG.

Delete and recreate the LAG from director and upstream port.
a. Delete the LAG from director.

b. Delete the LAG from upstream port.

c. Recreate the LAG on upstream port.

d. Recreate the LAG on director.

If the LAG is created on the Fabric Director before creating the LAG on the upstream ethernet switch, a MAC storm can occur.

To troubleshoot the duplicate MAC at ESX host level download and Install RV tools. RV tools will assist in finding duplicate MACs.

Note- If the host is windows OS and it is using HA vNIC's, the MAC moves can happen between directors when a link flab occurs

Attachments

This solution has no attachment