Cisco 3750 trunks

I am currently replacing our backbone switches (2 x 3560's) linked together via

trunked ether channels.

The user switches (2960's) connect to each 3560 using their 2 x 1GB trunked

Ports.

Install a stack of (3 x WS-C3750V2-24TS-S 's) as the main backbone and server connections.

Install a stack  of ( 2 x 3750's) for the user switches to connect to . This will

Connect to the 3750X's using multiple trunked ether channels (2 x to

each 3750X)

Then ether channel and trunk each user 2960' to each the 3750's (2 x to

each 3750) using the two 1GB Ethernet ports.

This allows us to use the 3750x's for the high bandwidth requirements and

The user switches are kept away from the main backbone.

Not sure if you've already purchased the 3750x's, but if you haven't, see if you can order the new 3850 switches. They are the successor the to 3750X. Some cool features are a 480G stack cable (versus 64G with the 3750x), have netflow enabled on ALL ports, up to 4 10G ports (2 10G ports on the 3750X), and has a built in wireless controller (activated via licensing, but if not needed... just don't license it).

Here's the kicker - it's the exact same list price as the 3750X.

If you have an "ordinary office" network load, there is no advantage in putting the the 2x 3750 for the client switches to connect to. Even with etherchannel, you will have multiple client connections sharing each 1GB link, from the 3750 switches to the 3750 X switches

If your budget permits, I've be tempted to do a stack of 5x 3750 X, if it doesn't then even a stack of 4x 3750 X with the client switches distributed across would be better, then you can utilize the stack bandwidth between the switches.

As you are stacking the 3750 X switches, the trunks to/from each trunked server and switch should be across two switches, for example port 1 on switch 1 and port 1 on switch 2 rather than ports 1 & 2 on switch 1.

Much as I like the WS-C3750X-48T-S  series of switches (and manage several stacks of them), for a L2 network, or even one with "light" L3 requirements (inter VLAN routing, but not BGP etc) I would usually specify the HP 5400zl series.