Configuring SDM Templates

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Information About Configuring SDM Templates

Restrictions for SDM Templates

The following are restrictions when using SDM templates:

  • The default template is the only template supported on switches running the LAN Lite image.

  • The LAN Base default template is used with switches in a homogeneous stack.

  • The LAN Base routing template is supported only on switches running the LAN Base image.

  • The LAN Base routing template is used with switches in a mixed stack.

  • The switch supports homogeneous stacking and mixed stacking. Mixed stacking is supported only with the Catalyst 2960-S switches. A homogenous stack can have up to eight stack members, while a mixed stack can have up to four stack members. All switches in a switch stack must be running the LAN Base image.

SDM Templates

You can use Switch Database Management (SDM) templates to configure system resources to optimize support for specific features, depending on how your device is used in the network. You can select a template to provide maximum system usage for some functions.
To allocate ternary content addressable memory (TCAM) resources for different usages, the switch SDM templates prioritize system resources to optimize support for certain features. These templates are supported on your device:

  • Default—The default template gives balance to all functions.

  • LAN Base default—The LAN Base default template is to be used with switches in a homogeneous stack.

  • LAN Base routing—The LAN Base routing template supports IPv4 unicast routes for static routing SVI configuration.

The LAN Base routing template prevents other features from using the memory allocated to unicast routing. Routing must be enabled on your switch before you can use the routing template.

For more information about homogeneous and mixed stacks, see the Catalyst 2960-X Switch Stacking Configuration Guide.

After you change the template and 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 becomes active after a reload.

Default and LAN Base Templates

  • Default and LAN Base routing templates—Optimizes the resources in the switch to support feature level for no routed interfaces and 255 VLANs.

  • LAN Base default—Optimizes the resources in the switch to support feature level for no routed interfaces and 1024 VLANs.

Table 1 Approximate Number of Feature Resources Allowed by Templates

Resource

Default

LAN Base Default

LAN Base Routing

LAN Lite

Unicast MAC addresses

8 K

16 k

4 K

16 k

Active VLANs/VLAN IDs

255/4096

255/1024

255/4096

64/4096

NetFlow Entries

16 K

—

—

—

IPv4 IGMP groups

.375 K

1 K

.375 K

1 K

IPv4 unicast routes

0

3 K

.875 K

0

  • Directly connected hosts

0

2 K

.875 K

0

  • Indirect routes

0

1 K

80

0

IPv4 policy based routing ACEs

0

0

0

0

IPv6 multicast groups:

.25 K

1 K

.25 K

0

  • Directly connected IPv6 addresses

.25 K

2 K

.75 K

0

  • Indirect IPv6 unicast routes

32

1 K

32

0

IPv6 policy based routing ACEs

0

0

0

0

Ipv4 MAC QoS ACEs

.375 K

.5 K

.375 K

.256 K

IPv4 MAC security ACEs

.375 K

.625 K

.375 K

.256 K

IPv6 policy based routing ACEs

0

0

0

0

IPv6 QoS ACEs

60

.5 K

.125 K

0

IPv6 security ACEs

.125 K

.625 K

.25

0
Related Information
Examples: Displaying SDM Templates
Setting the SDM Template

SDM Templates and Switch Stacks

All stack members use the same SDM template that is stored on the stack master. When a new switch is added to a stack, as with the switch configuration and VLAN database files, the SDM configuration that is stored on the stack master overrides the template configured on an individual switch.

Version-mismatch (VM) mode has priority over SDM-mismatch mode. If a VM mode condition and an SDM-mismatch mode exist, the switch stack first attempts to resolve the VM-mode condition. You can use the show switch privileged EXEC command to see if any stack members are in SDM-mismatch mode.

How to Configure SDM Templates

Setting the SDM Template

Follow these steps to use the SDM template to maximize feature usage:

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    sdm prefer { default | lanbase-default | lanbase-routing }

    4.    end

    5.    reload


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example: 
    Switch> enable
     

    Enables privileged EXEC mode. Enter your password if prompted.

     

    Step 2configure terminal


    Example: 
    
Switch# configure terminal
     

    Enters the global configuration mode.

     
    Step 3 sdm prefer { default | lanbase-default | lanbase-routing }


    Example: 
    Switch(config)# sdm prefer lanbase-routing
     

    Specifies the SDM template to be used on the switch. The keywords have these meanings:

    • default —The default template provides balance for all Layer 2, IPv4 and IPv6 functionality.

    • lanbase-default —The LAN Base default template provides both IPv4 and IPv6 static routing functionality.

    • lanbase-routing —The LAN Base routing templates provides both IPv4 and IPv6 static routing functionality.

    Use the no sdm prefer command to set the switch to the default template, The default template balances the use of system resources.

     
    Step 4end


    Example: 
    
Switch(config)# end
     

    Returns to privileged EXEC mode.

     
    Step 5reload


    Example: 
    Switch# reload
     

    Reloads the operating system.

     

    Configuration Examples for SDM Templates

    Examples: Displaying SDM Templates

    This is an example output showing the default template information.

    Switch# show sdm prefer default 
 
 "default" template:
 The selected template optimizes the resources in
 the switch to support this level of features for
 0 routed interfaces and 255 VLANs.

  number of unicast mac addresses:                  8K
  number of IPv4 IGMP groups + multicast routes:    0.375k
  number of IPv4 unicast routes:                    0
  number of IPv6 multicast groups:                  0.25K
  number of directly-connected IPv6 addresses:      0.25K
  number of indirect IPv6 unicast routes:           32
  number of IPv4 policy based routing aces:         0
  number of IPv4/MAC qos aces:                      0.375k
  number of IPv4/MAC security aces:                 0.375k
  number of IPv6 policy based routing aces:         0
  number of IPv6 qos aces:                          60
  number of IPv6 security aces:                     0.125k


Switch#

    This is an example output showing the LAN Base default template information.

    Switch# show sdm prefer lanbase-default
 
 "lanbase-default" template:
 The selected template optimizes the resources in
 the switch to support this level of features for
 0 routed interfaces and 1024 VLANs.

  number of unicast mac addresses:                  16K
  number of IPv4 IGMP groups + multicast routes:    1K
  number of IPv4 unicast routes:                    3K
    number of directly-connected IPv4 hosts:        2K
    number of indirect IPv4 routes:                 1K
  number of IPv6 multicast groups:                  1K
  number of directly-connected IPv6 addresses:      2K
  number of indirect IPv6 unicast routes:           1K
  number of IPv4 policy based routing aces:         0
  number of IPv4/MAC qos aces:                      0.5K
  number of IPv4/MAC security aces:                 0.625k
  number of IPv6 policy based routing aces:         0
  number of IPv6 qos aces:                          0.5K
  number of IPv6 security aces:                     0.625k 

Switch#

    This is an example output showing the LAN Base routing template information.

    Switch# show sdm prefer lanbase-routing
 
 "lanbase-routing" template:
 The selected template optimizes the resources in
 the switch to support this level of features for
 0 routed interfaces and 255 VLANs.

  number of unicast mac addresses:                  4K
  number of IPv4 IGMP groups + multicast routes:    0.375k
  number of IPv4 unicast routes:                    0.875k
    number of directly-connected IPv4 hosts:        0.875k
    number of indirect IPv4 routes:                 80
  number of IPv6 multicast groups:                  0.25K
  number of directly-connected IPv6 addresses:      0.75K
  number of indirect IPv6 unicast routes:           32
  number of IPv4 policy based routing aces:         0
  number of IPv4/MAC qos aces:                      0.375k
  number of IPv4/MAC security aces:                 0.375k
  number of IPv6 policy based routing aces:         0
  number of IPv6 qos aces:                          0.125k
  number of IPv6 security aces:                     0.25K


Switch#

    Examples: Configuring SDM Templates

    This example shows how to configure the VLAN template: 

       
Switch(config)# sdm prefer lanbase-routing 
Switch(config)# exit
Switch# reload
		Proceed with reload? [confirm]

    Additional References for SDM Templates

    Related Documents

    Related Topic Document Title

    SDM commands

    Catalyst 2960-X Switch System Management Command Reference

    Standards and RFCs

    Standard/RFC Title
    None

    —

    MIBs

    MIB MIBs Link
    All supported MIBs for this release.

    To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

    http:/​/​www.cisco.com/​go/​mibs

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    Feature History and Information for Configuring SDM Templates

    Release

    Modification

    Cisco IOS 15.0(2)EX

    This feature was introduced.