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Adding Another Cisco Switch?

By Chuckybear ·
Hi folks, forgive me ahead of time I am not the most advance when it comes to larger networks and Cisco switches.

We have a building with a Cisco MDF 4507 and a couple IDF's with Cisco 3750's. We found a room with a patch panel and a hub attached to it basically in the ceiling. One of those lines tie back into the MDF as there are several computers we know of that are going through this rooms hub. I'd like to replace the hub with an older spare Catalyst 3500 switch. So I began to configure it, however when I plug it into the network through another switch in my office which is also a Catalyst 3500, the port go down with Errdisable. I found how to get the port back working so my questions are:

Q1: Can I add another switch to the network in this fashion?
Q2: If so are there are per-requisites that I need to configure to make it play nice on the network. For example to do I need to configure the two ports that connect each other a certain way?

Thanks in advance for your time and help!

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Repost as 'Q&A'

by HAL 9000 Moderator In reply to Adding Another Cisco Swit ...

Try reposting this in the 'Q&A' forum. The 'Discussion' forum is for matters of general discussion, not specific problems in search of a solution. The 'Water Cooler' is for non-technical discussions. You can submit a question to 'Q&A' here:;content

There are TR members who specifically seek out problems in need of a solution. Although there is some overlap between the forums, you'll find more of those members in 'Q&A' than in 'Discussions' or 'Water Cooler'.

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