troubleshooting Question

Switch loop suggestion - Cisco Router

Avatar of RandallVillalobos
RandallVillalobosFlag for Costa Rica asked on
NetworkingSwitches / HubsNetwork Architecture
5 Comments2 Solutions756 ViewsLast Modified:
Hello Experts,

We used to have the following setup in a "cascade" setup.
3comA-connects to 3comB- 3comC connects to 3comD to 3comE and so fort. Total 7 Switches.

We bought a Cisco 2960 and decided to have all the switches connect to the Cisco as the
"Backbone Switch".

So we broke the "cascade" and now every switch connects to a different port on the Cisco 2960.

We are getting a loop after  this setup, every now and then different parts of the network loose connectivity.  We only have Vlan1 enabled and the default setup that came with the Cisco Switch.

To avoid any other switch from becoming a "root bridge", I ran the following command on the Cisco Switch so that it could be the main router:  
spanning-tree vlan 1-4094 priority 0.   (This did not work)

Any ideas on how I can find the loop?

Thanks,
R
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 2 Answers and 5 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 5 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros