Memory Optimization

Cisco’s 3560 is a multilayer switch, designed to operate well at both layer 2 and layer 3. Due to its dual nature, however, Cisco had to allocate memory in a way that wouldn’t hinder operation in either mode out-of-the-box.

Out of the box, the 3560 has its memory allocated to support learning lots of MAC addresses and lots of unicast IP routes. If you know you’ll be using a 3560 as primarily a L2 or L3 device it makes sense to adjust the memory allocation accordingly. That’s done with a single command:

Look here to see the differences between default, routing, and VLAN mode. Keep in mind that a reload is necessary to apply the changes.

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