No the nic does not cause a loop because one of them is active and the other is in standby. It seems to be an issue going across the WAN but I can't understand why.
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Connectivity Issue with Multiple switched enviorment
OK max points for this and time is critical. I will try to explain this as best that I can. I have a server room and multiple servers with 2 nic cards in each. I have two cisco 3560G switches. Eash server has a run to each switch and the server nic are set up in a team. The team uses failove so one nic is active and the other is in a standby mode. Switch 1 had a fiber connection to a WAN, on the other side is the same setup. There is a patch cable running between Switch1 and Switch 2. Here is the problem. If your active NIC is using Switch 2 than you cannot get over the WAN. If it is using Switch1 you can. There is no routing or anything set up here, it is a flat network. The less devices I.E. routers that I have to go through the better. There are no VLANs or anything. The only thing I have done is IP the switches, Also if I am on Switch 2 I can ping devices on switch 1. Please help as this is an emergency. Thank you
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Answers
Is your WAN connection on both switches going back to the same router? It sounds like your servers have a gateway that only switch1 can see. As a test you can use your laptop and change the gateway to the IP address of the router than switch2 connects to. At that point your laptop should be able to get out to the WAN on switch2 but not while connected to switch1. If you could give a few more details on the WAN setup it might help.
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by: ikalmarPosted on 2009-07-17 at 11:22:41ID: 24881327
Hi, hat shows the log, when it is happening?
Is the NIc causes loop?