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Extreme Management center: Links are missing on map overview

  • 31 July 2019
  • 6 replies

Extreme Management center: Links are missing on map overview

When trying to add a link which should normally be seen on the map overview, it says:
WARNING: Port 1/19 already has a link to:
MAC: B4:2D:56:35:5C:01
Port: 2/50
Discover Protocol: LLDP
Do you wish to overwrite this information?

But why is it not showing that link then in the map overview?

Thanks for helping me with this

6 replies

Userlevel 4
With the log message, it looks like the port 1/19 already has link connected to the remote side which has above information (port 2/50, IP:, etc.). So when you are trying to manually add a link on the port 1/19, above log is displayed. Please kindly check why the port 1/19 already have that information.

Best regards,
What resolved this issue for me was turning on Collect Device Statistics for all the switches. I had a few that were set to disable instead of historical. Once I set this and refreshed devices the links all started showing up.

Still having issues with one switch, but it's had attitude problems lately anyway.
Userlevel 2
In such situations it's often helpful to check content of network-monitor-cache and maybe clear this cache.
Userlevel 7
The Extreme Management Center learned there is a link based on LLDP (in your case). that Link goes to some device. The link should be visible on the map if both devices (both ends) are on the map.

I guess your issue is caused by inconsistency in the neighbor reporting, something like:
device A does have IP A1 and A2. device B does have IP B1 and B2. You have in Extreme Management Center device A modeled based on address A1 and device B modeled as address B1. The Management learned that neighbor of A1 is B2, while B2 is not on your map.

Check what is reported to the management by LLDP.

Userlevel 7
to be more precise: do you have on the same map?
Hi, after upgrading the XMC version to, it did show the links.
Thanks all for your help.