Doubt about EAPS topology with 2 core switches

[edgarquadros]

Hello guys!

I'm in a scenario (in the attached draw) with 7 switches, where 2 of them are cores X460, and the 5 others are edges X440. We have EAPS configured with 5 Control VLANs and one VoIP VLAN. When the uplinks between Core 1 and Core 2 (2 red cables, ports 29 and 30) are disconnected, a loop is occurring and ELRP is blocking all ports on Edge switches that are connected with the Master EAPS Core 1 switch.

So, after re-connect the uplink between the 2 Cores, I need to access all Edge switches and re-enable ports connected with Core Master EAPS.

Is this the behavior expected or maybe we have something wrong with the configuration?

I don't have much more information related to this scenario, and why it was deployed in this way, because I'm new to the company. So, I just need to figure out and understand what I need to do to fix it.

BR,

Edgar

[StephenW · Accepted solution]

Edgar,

What I think you had was a superloop.  You will need to configure an EAPS common link between the cores. 

The link below will give you some background on it.  

ExtremeXOS User Guide (extremenetworks.com)

Thanks,

Stephen

[edgarquadros]

StephenW,

I found a misconfiguration related to EAPS in the SW-Core1.

Thanks for help! 

[OscarK]

EAPS should have 1 control vlan and many protected vlans (at least when it is 1 eaps ring).

I suggest you open a case and get this investigated right, this is not behaving as it should.