Stacking/clustering 3560s

baskalter
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I've got 2 3750s and a 3750G 12p currently stacked, now I've got 4 new 3560Gs laying around. I know I can't stack them but I could cluster them. But what is more important, doubling the backplane speed (3560G vs 3570) or keeping the 32Gbit stack speed currently in place? This is our coreswitch and via it our user access the file/mail server and the i-net.
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Istvan KalmarHead of IT Security Division
Top Expert 2010

Commented:
Keep the cluster, and connect 3560 via ethercehannel

Author

Commented:
Currently there is no cluster, just the stacked 3570s. I'm asking if it would be beneficial to replace them by a cluster of 3560s.  
Commented:
You can do both. The 3750 stack would just be seen as one switch in your cluster. So the cluster would look like it had 5 switches (1 3750 and 4 3560s)
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Author

Commented:
That's interesting, as stated in my question I have 3 switches stacked right now and was wondering if replacing them with the faster 3560s (but in a cluster thus through slower trunks) would improve speed. But adding on 1 or 2 3560s is an idea too. Not my question though.
Les MooreSr. Systems Engineer
Top Expert 2008
Commented:
If the option is to keep the 3750 stack or migrate to a 3560 cluster, that depends.
Obviously there are advantages of having the high speed backplane of the stack
Yet there may also be advantages of the Gigabit ports of the 3560's
You have some gigabit ports on the switch stack, perhaps as many as 24 on the stack.
If 24 gigabit ports are enough, and without knowing your total infrastructure, it may be plenty, then keep the stack.
If the 3560's would provide other services, i.e. PoE that you don't have with the stack, then perhaps use them as edge/access devices with multiple link etherchannel connections to the stack as the core.
unless you are pushing a whole lot of data around (do you have any historical metrics?), 100M to the desktop with Gig to the servers is generally plenty.

Author

Commented:
Ok thank you guys, the 24GIg ports are enough for now. The thing that was eating at me was the much faster backplane of the 3560G's versus the 3570's. In an ideal world we'd go out shopping for some 3570G's but they are a bit pricey. If only the 3560G's were stackable, we wouldn't be having this conversation. I think I will add one 3560G to a cluster for the PoE functionality, this ought to offload  the 3570s. Unfortunately the coreswitch is also being used as an edge switch as this whole infra was built on the go. So I will try to relieve the coreswitch of those duties and get it working faster that way. A shared solution is in place I believe. Thanks again.

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