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Catalyst 3560 Switch Command Reference
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Chapter 2 Catalyst 3560 Switch Cisco IOS Commands
sdm prefer
sdm prefer
Use the sdm prefer global configuration command on the switch to configure the template used in Switch
Database Management (SDM) resource allocation. You can use a template to allocate system resources
to best support the features being used in your application. Use a template to provide maximum system
usage for unicast routing or for VLAN configuration, or to select the dual IPv4 and IPv6 template to
support IPv6 forwarding (supported only when the switch is running the advanced IP services image).
Use the no form of this command to return to the default template.
sdm prefer {access | default | dual-ipv4-and-ipv6 {default | vlan} | routing | vlan}
no sdm prefer
Syntax Description
Defaults The default template provides a balance to all features.
Command Modes Global configuration
Command History
Usage Guidelines You must reload the switch for the configuration to take effect. If you enter the show sdm prefer
command before you enter the reload privileged EXEC command, the show sdm prefer command
shows the template currently in use and the template that will become active after a reload.
Use the no sdm prefer command to set the switch to the default desktop template.
access Provide maximum system usage for access control lists (ACLs). Use this
template if you have a large number of ACLs.
default Give balance to all functions.
dual-ipv4-and-ipv6
{default | vlan}
Select a template that supports both IPv4 and IPv6 routing.
• default—Provide balance to IPv4 and IPv6 Layer 2 and Layer 3
functionality.
• vlan—Provide maximum system usage for IPv4 and IPv6 VLANs.
Note Though visible on all switches, this option is supported only if the
switch is running the advanced IP services image.
routing Provide maximum system usage for unicast routing. You would typically use
this template for a router or aggregator in the middle of a network.
vlan Provide maximum system usage for VLANs. This template maximizes system
resources for use as a Layer 2 switch with no routing.
Release Modification
12.1(19)EA1 This command was introduced.
12.2(25)SEA The dual-ipv4-and-ipv6 templates were added.
12.2(25)SED The access templates were added.