SWITCH 300-115: 1.1 Configure and verify switch administration

1.1.a SDM templates

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/configuration/guide/3750xscg/swsdm.html

sdm_prefer

Understanding the SDM Templates

You can use SDM templates to configure system resources in the switch to optimize support for specific features, depending on how the switch is used in the network. You can select a template to provide maximum system usage for some functions; for example, use the default template to balance resources, and use access template to obtain maximum ACL usage. To allocate hardware resources for different usages, the switch SDM templates prioritize system resources to optimize support for certain features.

You can select SDM templates for IP Version 4 (IPv4) to optimize these features on switches running the IP base or IP services feature set:

Note Do not select a routing template (sdm prefer routing) when the switch is running the LAN base feature set. Although visible in the command-line help, the LAN base feature set does not support routing. On switches running the LAN base feature set, routing values shown in the templates are not valid.

  • Routing—The routing template maximizes system resources for unicast routing, typically required for a router or aggregator in the center of a network.
  • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses. It would typically be selected for a Layer 2 switch.
  • Default—The default template gives balance to all functions.
  • Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs.

Note On switches running the LAN base feature set, routing values shown in the templates are not valid.