topic Re: Loop on access sw is Affecting distribution switch uplink in ICX Switches

Loop on access sw is Affecting distribution switch uplink

amir2019 — Tue, 07 May 2024 19:47:19 GMT

we have a branch office ( 2 Avaya ERS4826GTS-pwr+ in stack) connected to our HQ .

here the Toplogy

HQ -----Avaya ERS4826GTS-pwr+ in stack 1/25---------VLAN238-------1/2/8 ICX7250-24P in stack

Avaya ERS4826GTS-pwr+in stack 2/25--------VLAN238----------2/2/8 ICX7250-24P in stack

then

ICX7250-24P in stack1/2/26---------VLAN238-----1/2/1 ICX7250-24P -------VLAN 237

------VLAN 80

------VLAN 238

we have multiple loop issue on VLAN 237 but the problem is that UPLINK on Avaya ERS4826GTS-pwr to HQ goes down due to this loop !

can you PLease help preventing the loop to affect the Avaya ERS4826GTS as it put down all the site

Re: Loop on access sw is Affecting distribution switch uplink

Chandini — Wed, 08 May 2024 10:37:29 GMT

Hi Amir2019

Thank you for reaching us.

Could you please help me with below details

Could you help us with output of "show version" ?
When you mean you are seeing loop on access switch is that being received from a end device or could you help us with more details which makes you map the problem to be a loop Issue on access switch ?
Are you seeing a specific logs from "show logging" which says more about the issue you are seeing ?

Below are few links you can refer and they help address loop related issues in the network.

Configuring RSTP (802.1w) and Spanning Tree Best Practices on ICX Switches

https://community.ruckuswireless.com/t5/RUCKUS-Self-Help/Configuring-RSTP-802-1w-and-Spanning-Tree-Best-Practices-on-ICX/m-p/36660

How to Enable Loose Loop Detection on ICX

https://community.ruckuswireless.com/t5/RUCKUS-Self-Help/How-to-Enable-Loose-Loop-Detection-on-ICX/m-p/50137

Thanks

Re: Loop on access sw is Affecting distribution switch uplink

inphobia — Fri, 10 May 2024 19:01:30 GMT

can you perhaps also add a network diagram? it's not clear to me why vlan 237 loops on your avaya's when i don't even see how it's arriving there.
or are the icx devices flooding traffic to all ports during a loop and overloading the avaya's? while not ideal you can use storm control to err-disable the ports until you figure out the loop.