Configuring Sdm Templates; Understanding The Sdm Templates - Cisco ME 3400 Software Configuration Manual

Configuring SDM Templates

This chapter describes how to configure the Switch Database Management (SDM) templates on the
Cisco ME 3400 Ethernet Access switch. SDM template configuration is supported only when the switch
is running the metro IP access image.
For complete syntax and usage information for the commands used in this chapter, see the command
Note
reference for this release.
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Understanding the SDM Templates

If the switch is running the metro IP access image, you can use SDM templates to optimize system
resources in the switch to support specific features, depending on how the switch is used in the network.
The SDM templates allocate TCAM resources to support different features. You can use the SDM
templates for IP Version 4 (IPv4) and select the default template to balance system resources or select
the layer-2 template to support only Layer 2 features in hardware.
Switches running the metro base or metro access image support only the layer-2 template
Note
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The dual IPv4 and IPv6 templates also enable a dual stack environment. See the
SDM Templates" section on page
OL-9639-07
Understanding the SDM Templates, page 6-1
Configuring the Switch SDM Template, page 6-3
Displaying the SDM Templates, page 6-5
Layer-2—The layer-2 template maximizes system resources for Layer 2 functionality and does not
support routing. You should use this template when the switch is being used for Layer-2 forwarding.
When you select the layer-2 template on a switch running the metro IP access image, any routing is
done through software, which overloads the CPU and severely degrades routing performance.
Default—The default template gives balance to all functions: Layer 2 and Layer 3 (routing). This
template is available only on switches running the metro IP access image. If you do not use the
default template when routing is enabled on the switch, any routing is done through software, which
overloads the CPU and severely degrades routing performance.
C H A P T E R
6-2.
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
6
"Dual IPv4 and IPv6
6-1