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Configuring the Switch SDM Template
SDM Template Configuration Guidelines
Follow these guidelines when selecting and configuring SDM templates:
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Setting the SDM Template
Beginning in privileged EXEC mode, follow these steps to use the SDM template to maximize feature
usage:
Command
Step 1
configure terminal
Step 2
sdm prefer {access | default |
dual-ipv4-and-ipv6 {default | routing |
vlan} | routing | vlan}
Step 3
end
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
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When you select and configure SDM templates, you must reload the switch for the configuration to
take effect.
Use the sdm prefer vlan global configuration command only on switches intended for Layer 2
switching with no routing. When you use the VLAN template, no system resources are reserved for
routing entries, and any routing is done through software. This overloads the CPU and severely
degrades routing performance.
Do not use the routing template if you do not have routing enabled on your switch. The sdm prefer
routing global configuration command prevents other features from using the memory allocated to
unicast routing in the routing template.
If you try to configure IPv6 without first selecting a dual IPv4 and IPv6 template, a warning message
is generated.
Using the dual stack templates results in less TCAM capacity allowed for each resource, so do not
use if you plan to forward only IPv4 traffic.
Although these features are visible in the template in the CLI, the switch does not support IPv4 or
IPv6 policy-based routing or IPv6 Qos ACLs.
Purpose
Enter global configuration mode.
Specify the SDM template to be used on the switch:
The keywords have these meanings:
access—Maximizes system resources for ACLs.
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default—Gives balance to all functions.
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dual-ipv4-and-ipv6—Select a template that supports both IPv4
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and IPv6 routing.
default—Balance IPv4 and IPv6 Layer 2 and Layer 3
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functionality.
routing—Provide maximum usage for IPv4 and IPv6
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routing, including IPv4 policy-based routing.
vlan—Provide maximum usage for IPv4 and IPv6 VLANs.
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routing—Maximizes routing on the switch.
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vlan—Maximizes VLAN configuration on the switch with no
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routing supported in hardware.
The default template balances the use of system resources.
Return to privileged EXEC mode.
Chapter 6
Configuring SDM Templates
OL-8915-03
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