XOS Fabric attach with Policy - I-SID remains on switch after disconnect

[Jasper_R]

Hi Guys,

the advantage of Fabric Attach is that you don't have to configure your VLANS on the uplinks AND that if there is no I-SID, no VLAN will be active on the uplink, thus making your broadcast domain smaller.

All good.

Now lets get Extreme Control (NAC) into place here. With policy you can assign a VLAN and I-SID (NSI) to a port based on X an Y condition.

Also very good!

But when the client disconnects, the I-SID to VLAN mapping remains on the switch!
=> You might ask: what's the point of having Fabric Attach?

I am probably missing some configuration piece (some timer ?) where the I-SID to VLAN mapping will disappear and the VLAN is no longer available on the switch. (test setup is with just 1 client on the switch).

Anyone idea's on this?

Thanks!

Kind regards,

Jasper

[Jasper_R]

Hi Ron,

thanks! Didn't came across this one! Many thanks!

Kind regards!

Jasper

[Ron_Huygens · Accepted solution]

Hi Jasper,

This is a known issue described in CR# xos0072447
Target is EXOS 22.7 ETA June 19

https://gtacknowledge.extremenetworks.com/articles/Solution/Fabric-Attach-does-not-remove-unused-NSI

Regards

Ron