Sdm Template Configuration Guidelines; Setting The Sdm Template - Cisco ME 3400 Software Configuration Manual

Configuring the Switch SDM Template

SDM Template Configuration Guidelines

Follow these guidelines when selecting and configuring SDM templates:
•
•
•
•
•
•

Setting the SDM Template

Beginning in privileged EXEC mode, follow these steps to use the SDM template to select a template on
a switch running the metro IP access image:
Command
Step 1
configure terminal
Step 2
sdm prefer {default | dual-ipv4-and-ipv6
{default | routing | vlan} | layer-2}
Step 3 end
Step 4 reload
After the system reboots, you can use the show sdm prefer privileged EXEC command to verify the new
template configuration. 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.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
6-4
You must reload the switch for the configuration to take effect.
If you are using the switch for Layer 2 features only, select the layer-2 template.
Do not use the default template if you do not have routing enabled on your switch. The sdm prefer
default global configuration command prevents other features from using the memory allocated to
unicast routing in the routing template.
You should use the default template when you plan to enable routing on the switch. If you do not
use the default template when routing is enabled, routing is done through software, which overloads
the CPU and severely degrades routing performance.
If you try to configure IPv6 features 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.
Purpose
Enter global configuration mode.
Specify the SDM template to be used on the switch:
The keywords have these meanings:
default—Balance all functions.
•
dual-ipv4-and-ipv6—Select a template that supports both IPv4
•
and IPv6 routing.
default—Balance IPv4 and IPv6 Layer 2 and Layer 3
–
functionality.
routing—Provide maximum usage for IPv4 and IPv6
–
routing, including IPv4 policy-based routing.
vlan—Provide maximum usage for IPv4 and IPv6 VLANs.
–
layer-2—Support Layer 2 functionality and do not support
•
routing on the switch.
Return to privileged EXEC mode.
Reload the operating system.
Chapter 6 Configuring SDM Templates
OL-9639-07