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6-1
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
78-17058-01
6
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.
Note For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
This chapter consists of these sections:
• Understanding the SDM Templates, page 6-1
• Configuring the Switch SDM Template, page 6-2
• Displaying the SDM Templates, page 6-4
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 default
template to balance system resources or select the layer-2 template to support only Layer 2 features in
hardware.
Note Switches running the metro base or metro access image support only the layer-2 template
• 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.