Question

MAC move seen in Cisco switch connected to Extreme


Okey but I have other question and I have Cisco 3650 L3 end two xos summits 430 24t connecting trunk connection. Cisco L3 say flopping extreme switch connecting ports to vlan 1. What recommend give me about that. Note: This conversation was created from a reply on: X430-24p and summitlite-16.1.2.14.xos firmware problem.

7 replies

Userlevel 7
Hi Merab,

I am assuming this Cisco switch is reporting MAC moves. What is the MAC address that it is showing?

I have seen this in the past due to EDP or ELRP packets being seen from both switches.

-Brandon
Userlevel 7
Hi Merab,
Do you still need assistance with this issue?
We have a CISCO 6509 reporting flapping on ports that are using Extreme switches at other end.
Mac address - 00e0.2b00.0001
What can be done to rectify this and eliminate the error clogging up our logs?
Userlevel 7
Terry Harcleroad wrote:

We have a CISCO 6509 reporting flapping on ports that are using Extreme switches at other end.
Mac address - 00e0.2b00.0001
What can be done to rectify this and eliminate the error clogging up our logs?

This is due to either EDP packets or ELRP packets, both of which are sourced from this MAC address.

I would suggest disabling EDP on the ports that connect to non-EXOS switches. If this is due to ELRP and you do not want to disable it on those ports, you may want to see if it is possible to exclude a specific log message from the Cisco's log buffer.
Userlevel 7
Terry Harcleroad wrote:

We have a CISCO 6509 reporting flapping on ports that are using Extreme switches at other end.
Mac address - 00e0.2b00.0001
What can be done to rectify this and eliminate the error clogging up our logs?

Agreed. You can disable EDP on the ports connecting to the Cisco with the disable edp ports command.
Userlevel 6
Hi Terry, this MAC address is used by EDP (Extreme Discovery Protocol).

Since your are connecting those ports to a Cisco device, you can disable EDP on specific ports with disable edp ports command.

You can also check the GTAC Knowledge link below for details:

https://gtacknowledge.extremenetworks.com/articles/Q_A/Why-are-my-non-Extreme-devices-reporting-link...
Many thanks! Much appreciated

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