The 12.2(25)SEE IP Base images for both Cat3560 and Cat3750 support EIGRP Stub Routing. All IOS versions before this require IP Services or Advance IP Services feature sets to enable EIGRP Stub Routing.
EIGRP stub provides full routing support for only those Layer 3 devices directly connected to the switch and not for routers downstream of the switch. Available in the IP Base images for the Catalyst 3750 and 3560 switches. Complete EIGRP routing support is available on those switches in the IP Services and Advanced IP Services images.
Be wary of how much you're planning to grow, too. If you're catering for a fairly large user population that will require stacking multiple 3750s, make sure that you test the Layer-3 convergence within the stack when the (stack) Master switch fails. Based on our earlier tests, the Master switch reelection and Layer-3 convergence could take minutes, not seconds.
Thanks for the info. We are planning about 55 closets with dual connected 3750 stacks. It appears to be a better option than spanning tree. What is the affect on the overall network? Also, have you seen a middle 3750 fail leaving two separate stack with the same network?
I agree with Aaron. The convergence times are pretty quick on these boxes and mean time between failure is something silly like 30 years.
There are 2 ways that you can use the stackwise cables on the back of the switches. You can either do one after the other from the top to the bottom and then have a long (1m, 3m, etc) cable returning from bottom to top. Or you could connect the short cables in such a way that you don't need the ong cables. Have a go at working it out - have a look at this link (figure 3-7):-
The other option is to use spanning tree but use rapid spanning tree and route at the 3750's which conververges within 2-3 seconds that we have seen and seems to work pretty well now . The other poster is correct if the 3750 switchstacks are wired correctly you should never have a split stack .
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This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
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