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NNMi Support Tip: Best practice for Phantom/Orphaned Connections (FDB)

Hello Community,


NNMi 9.1. Patch 1 / NNMi 9.2x includes some changes that prevent the creation of phantom connections with connection source FDB.  However, those  connections that already exist in the database will remain. The following steps clean out and re-calculate all FDB connections in an effort to remove phantom connections.

In order to remove these phantom connections, do the following steps using the new script nnml2maint.ovpl (found in /opt/OV/support on Unix, and %NnmInstallDir%\support on Windows):


    # nnml2maint.ovpl deleteAllFDBConnections

  # nnml2maint.ovpl reAnalyzeAllWorkingSets


The first script example removes all existing FDB connections in the NNMi database. The second script example schedules the FDB connections to be recalculated. This recalculation may take from 15 minutes up to a few hours to complete, depending on the size of the  NNMi database.



[nnmsupport]$ ./nnml2maint.ovpl deleteAllFDBConnections

WARNING: Running this tool removes all L2 connections derived from
switch FDB tables so that they can be recalculated.
1Is it OK to remove these connections? [n] y
Thank you!
Deleting 94 connections from the database.
4295xxx deleted
4295xxx deleted
4295xxx deleted
2148xxx deleted
2148xxx deleted
2148xxx deleted
2148xxx deleted
Total connections deleted: 94

[nmsupport]$ ./nnml2maint.ovpl reAnalyzeAllWorkingSets
SwitchFdb2Conns should be kicked off in 5 minutes

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