Consolidated Platform Configuration Guide, Cisco IOS XE 3.3SE (Catalyst 3850 Switches)
Configuring SDM Templates
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Configuring SDM Templates

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release.

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Information About Configuring SDM Templates

SDM Templates

You can use 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.

These templates are supported on your device:
  • Advanced—The advanced template is available on all supported images for this release. It maximizes system resources for features like netflow, multicast groups, security ACEs, QoS ACEs, and so on.
  • VLAN—The VLAN template is available only on the LAN Base license. The VLAN template disables routing and supports the maximum number of unicast MAC addresses. It would typically be selected for a Layer 2 device.

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 will become active after a reload.

The default is the advanced template.

Table 1 Approximate Number of Feature Resources Allowed by Templates

Resource

Advanced

VLAN

Number of VLANs

4094

4094

Unicast MAC addresses

32 K

32 K

Overflow unicast MAC addresses

512

512

IGMP groups and multicast routes

4 K

4 K

Overflow IGMP groups and multicast routes

512

512

  • Directly connected routes

32 K

32 K

  • Indirectly connected IP hosts

8 K

8 K

Policy-based routing ACEs

1024

0

QoS classification ACEs

3 K

3 K

Security ACEs

3 K

3 K

Netflow ACEs

1024

1024

Input Microflow policer ACEs:

256 K

0

Output Microflow policer ACEs:

256 K

0

FSPAN ACEs

256

256

Control Plane Entries:

512

512

Input Netflow flows:

8 K

8 K

Output Netflow flows:

16 K

16 K


Note


When the switch is used as a Wireless Mobility Agent, the only template allowed is the advanced template.


The tables represent approximate hardware boundaries set when a template is selected. If a section of a hardware resource is full, all processing overflow is sent to the CPU, seriously impacting switch performance.

SDM Templates and Switch Stacks

In a switch stack, all stack members must use the same SDM template that is stored on the active switch. When a new switch is added to a stack, the SDM configuration that is stored on the active switch overrides the template configured on an individual switch.

How to Configure SDM Templates

Configuring SDM Templates

Configuring the Switch SDM Template

Setting the SDM Template
SUMMARY STEPS

    1.    configure terminal

    2.    sdm prefer { advanced | vlan }

    3.    end

    4.    reload


DETAILED STEPS
      Command or Action Purpose
    Step 1 configure terminal


    Example:
    Switch> configure terminal 
    
    
     

    Enters global configuration mode.

     
    Step 2 sdm prefer { advanced | vlan }


    Example:
    Switch(config)# sdm prefer advanced 
    
    
     

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

    • advanced —Supports advanced features such as Netflow.
    • vlan —Maximizes VLAN configuration on the switch with no routing supported in hardware.
    Note   

    The no sdm prefer command and a default template is not supported.

     
    Step 3 end


    Example:
    Switch(config)# end 
    
    
     

    Returns to privileged EXEC mode.

     
    Step 4 reload


    Example:
    Switch# reload 
    
    
     

    Reloads the operating system.

     

    Monitoring and Maintaining SDM Templates

    Command Purpose

    show sdm prefer

    Displays the SDM template in use.

    reload

    Reloads the switch to activate the newly configured SDM template.

    no sdm prefer

    Sets the default SDM template.

    Configuration Examples for Configuring SDM Templates

    Examples: Configuring SDM Templates

    This example shows how to configure the VLAN template:

    		
    Switch(config)# sdm prefer vlan 
    Switch(config)# exit
    Switch# reload
    		Proceed with reload? [confirm]
    		
    		

    Examples: Displaying SDM Templates

    This is an example output showing the advanced template information:

    Switch# show sdm prefer 
    
    Showing SDM Template Info
    
    This is the Advanced template.
      Number of VLANs:                                 4094
      Unicast MAC addresses:                           32768
      Overflow Unicast MAC addresses:                  512
      IGMP and Multicast groups:                       8192
      Overflow IGMP and Multicast groups:              512
      Directly connected routes:                       32768
      Indirect routes:                                 8192
      Security Access Control Entries:                 3072
      QoS Access Control Entries:                      2816
      Policy Based Routing ACEs:                       1024
      Netflow ACEs:                                    1024
      Input Microflow policer ACEs:                    256
      Output Microflow policer ACEs:                   256
      Flow SPAN ACEs:                                  256
      Tunnels:                                         256
      Control Plane Entries:                           512
      Input Netflow flows:                             8192
      Output Netflow flows:                            16384
    These numbers are typical for L2 and IPv4 features.
    Some features such as IPv6, use up double the entry size;
    so only half as many entries can be created.
    
    
    Switch#
    		
    

    This is an example output showing the VLAN template information:

     
    Switch# show sdm prefer vlan
    
    Showing SDM Template Info
    
    This is the VLAN template for a typical Layer 2 network.
      Number of VLANs:                                 4094
      Unicast MAC addresses:                           32768
      Overflow Unicast MAC addresses:                  512
      IGMP and Multicast groups:                       8192
      Overflow IGMP and Multicast groups:              512
      Directly connected routes:                       32768
      Indirect routes:                                 8192
      Security Access Control Entries:                 3072
      QoS Access Control Entries:                      3072
      Policy Based Routing ACEs:                       0
      Netflow ACEs:                                    1024
      Input Microflow policer ACEs:                    0
      Output Microflow policer ACEs:                   0
      Flow SPAN ACEs:                                  256
      Tunnels:                                         0
      Control Plane Entries:                           512
      Input Netflow flows:                             16384
      Output Netflow flows:                            8192
    These numbers are typical for L2 and IPv4 features.
    Some features such as IPv6, use up double the entry size;
    so only half as many entries can be created.
    
    Switch#

    Additional References for SDM Templates

    Related Documents

    Related Topic Document Title
    SDM command reference

    System Management Command Reference (Catalyst 3850 Switches)

    VLAN configuration guide

    VLAN Configuration Guide (Catalyst 3850 Switches)

    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

    Technical Assistance

    Description Link

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    To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

    Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

    http:/​/​www.cisco.com/​support

    Feature History and Information for Configuring SDM Templates

    Release

    Modification

    Cisco IOS XE 3.2SE

    This feature was introduced.