About MikeC06933

MikeC06933 · 04-15-2021

Hi - Have an odd problem I can't get to the bottom of. I have an existing network with a couple of WS-C3550-12T switches on it that link two buildings via fiber. These have been working fine for years without any problems. They are running 12.2(44)SE...

MikeC06933 · 06-24-2021

Hi - I've done some more testing. If I plug the 3750X and 3550 together directly - the problem does NOT occur - but this is because the 3550 also changes the port mode to ISL Trunk - so both switches match configs with ISL trunk and communication wo...

MikeC06933 · 06-22-2021

I had assumed that management IP addresses would have no impact on l2 forwarding - but thanks for confirming. In looking at the VTP configuration - I realized it wasn't set on either switch - but whilst on that window - moved to the the Configure Por...

MikeC06933 · 06-22-2021

Hi - Thanks for your reply I re-read my original post - I'm afraid I can't see where I said I plugged directly into the 3550 - also the 3550 isn't part of a stack - there were two 3550's linked via fiber in the original network - and just a single 3...

MikeC06933 · 06-22-2021

Hi - Thanks for your reply Apologies for not being clearer on the network topology - however you are entirely correct - just by connecting a single 3750 stack via a single port on that stack to my existing network - it caused the outage. The 3750 sta...

MikeC06933 · 06-22-2021

Hi - Thanks for your reply. I don't think I made any configuration changes to any of the interfaces - so they should be at factory default settings - as per my post - just a minimal configuration - except I did also set up VTP under VLAN configurati...

Member Since	‎04-15-2021 12:51 PM
Date Last Visited	‎07-22-2021 06:56 AM
Posts	6
Total Helpful Votes Received	5

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Adding a 3750X switch to an existing network with 3550 switches disables them both

Re: Adding a 3750X switch to an existing network with 3550 switches disables them both

Re: Adding a 3750X switch to an existing network with 3550 switches disables them both

Re: Adding a 3750X switch to an existing network with 3550 switches disables them both

Re: Adding a 3750X switch to an existing network with 3550 switches disables them both

Re: Adding a 3750X switch to an existing network with 3550 switches disables them both