Managed Switches

Are there any Cisco switches considered "managed" and "Layer 3"?
We need to support multiple IPs coming in via our DSL and handle
linking different subnets.

[Denis]

I think Cisco Catalyst 3550 .

Seems you're right. Thank you!

The 3550 is an excellent switch for many purposes; but it may be substantially more than you need in your DSL environment. You might consider a less expensive, off-brand switch such as Netgear, Linksys, etc. 3550s are ~$4000 USD new.

I recommend 3550s a lot, but my use for them is typically layer 3 customer aggregation in datacenter / hosting environments, where paying $100/port makes sense for the features they provide. That may be a big cost for connecting workstations and small office servers.

Thanks jsw6! Can you suggest any concrete model as
alternative of 3550?

The Foundry 4802-PREM is also a good switch which is 48 Ports. But, then again it is expensive.