Sometimes we want different functionality from our layer 3 switches, someone may want a lot of VLANS, someone wants the switch to be able to have lots of routes, and someone wants to do IPv6 routing.
Luckily, Cisco have thought about this. You are able to use different SDM templates to achieve different usage of the memory.
To change the SDM template on the 3750, just use the following command:
switch(config)# sdm prefer (default|routing|vlan)
Here is a link to the specs: Table
On the 3560 you can also choose from access and dual-ipv4-and-ipv6
Link to specs here: Table
What you want to choose depends on what you want to do, now you know there exists a choice!
Follow me on twitter