STP - Loop

[mtbiker]

I have a Server with TWO Nic's, one public one private. Both connect to the same switch, but different IP & Subnet on the NIC. Would this be considered a LOOP ?

Thanks in advance.

 

[seito]

Here is a link to cisco's site for trouble shooting STP:

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800951ac.shtml#3b

I just happen to be studing stp for my midterm...
I would say as long as bridging isn't set over the NICs, It shouldn't be a loop.

STP uses BPDUs(bridge protocol data units) to exchange information about switch paths not end point NICs. If you want to make sure, I'd load up a sniffer, see if you see any looping through them. A sure sign would be a serious lag and unusually high utilization of bandwidth.

Are these both NICs connected to the root bridge? If so all ports would be forwarding on that switch.

Hope that helps

 

[mtbiker]

The Cisco 2924m-xl switch doesn't seem to show that it's bombing out on bandwidth. Actually everything seems ok. Spanning Tree is turned off on the switch. I do have a port group going to another Cisco 2950 switch but my information tells me that a port group is not a loop. I recently upgraded our internet connection and have set up a proxy machine. This machine has two NIC's, one public to attach to the public IP on the router, the other NIC has a private static IP so users can connect to the proxy. Because both NIC's we're going into the same switch, just wanted to check that I wasn't creating a LOOP. My understanding is that if I was, I would know it fairly quickly because everything would slow down.

Thanks for the info, and hope you do well on your midterm.

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