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CISCO SWITCHES FOR SMALL and MEDIUM BUSINESS

Introducing the next generation of Cisco Small and Medium Business Switches. Cisco is refreshing its SMB Switch portfolio. Click here  to learn more.


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SG300 EeeLldpMultiNeighbours: Multiple LLDP neighbours on port

We have a SG300-28PP switch, running SW version 1.3.5.58

 

In the log we see at irregular intervals:

 

09-May-2018 08:22:44 :%NT_GREEN-W-EeeLldpSingleNeighbour: Single LLDP neighbour on port gi11 - EEE operational state can be TRUE

09-May-2018 08:22:11 :%NT_GREEN-W-EeeLldpMultiNeighbours: Multiple LLDP neighbours on port gi11 - EEE operational state is FALSE

 

Port 11 is a trunk to a Cisco AP1832I-E-K9 access point, managend by a WLC.  Nothing else is connected to this point.

 

After some troubleshooting it seems that another "alien" accesspoint in the neighbourhood is probably causing this beheavior.  The mac address points to this manufacterer / device:

http://www.ruggedscience.com/sites/default/files/docs/TAP-620-M12_User%20Manual_V1.0.pdf

 

Can anybody comment on this observation?  This is causing some issues...  And i also wonder if it's a security vulnerability.

 

 

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Re: SG300 EeeLldpMultiNeighbours: Multiple LLDP neighbours on port

I put
No lldp receive
On the gi11 port and the problem seems to be gone
...

 

This is not really a solution of course.  Is these switches can be brought down with a simple LLDP packet, Cisco has a serious problem on their hand, in my humble opinion.