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HOSTFLAPPING error from ports with APC 9617

dhellwig
Level 4
Level 4

‎10-19-2004 04:58 PM - edited ‎03-02-2019 07:24 PM

Have cat 4500 with sup IV, occasionally get messages that some servers mac address is flapping to a port that has an APC UPS network management card in it. Tried to capture a trace, it seems like the card may be receiving packets and spitting them back again.

Has anyone heard of these phenomena?

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owillins
Level 6
Level 6

‎10-26-2004 01:31 PM

This error means that a host which was learned on one port has moved to another port. This error is generally seen with a spanning tree loop. Do you have redundant links in your topology?

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