topic RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment in ExtremeSwitching (EXOS/Switch Engine)

Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Fred_Adjei — Wed, 04 May 2016 19:10:00 GMT

ExtremeXOS (x460G2-48p-G4
Firmware: 16.1.2.14

RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Henrique — Wed, 04 May 2016 19:52:00 GMT

Hi Fred,

If you create a vlan, add ports to it and then create a physical loop without the right protection/configuration, that could cause network disruption.

Have you faced any network issue after creating a vlan? If so, could you please provide us more details?

RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Fred_Adjei — Thu, 05 May 2016 14:16:00 GMT

Write a reply Thanks Henrique. I was configuring vlan on the switch at the time. the commands entered are;
create vlan
configure vlan
configure vlan add ports tagged?? .... not sure whether I got this far before we started experiencing network issues. End-user PCs loosing connections to the network randomly. Lost communication to the second core.

RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Henrique — Fri, 06 May 2016 18:22:00 GMT

Hi Fred,

I believe this network impact was caused by a loop. Maybe right after adding the ports to a vlan.

Depending on your network topology you have some loop prevention mechanisms.

You can use STP/EAPS/ERPS for ring topologies which will also keep one link blocked to prevent looping and at same time provide redundancy.

Another option would be run ELRP or even track MAC.Moves to try to find which device is causing the loop.

RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Fred_Adjei — Tue, 10 May 2016 16:57:00 GMT

Hi Henrique,

Many thanks for the explanation and giving me pointers for the future.

RE: Can a partly configured vlan on an extreme summit switch cause network disruption in a live environment

Ryan_Mathews — Tue, 10 May 2016 16:57:00 GMT

Thanks for joining the Hub Fred. We're glad to have you in our purple Community!