7.4 MLS on the Switch
7.4.1 Enabling and disabling MLS on the switch
MLS is enabled by default on the Catalyst Series Switches that support Layer 3 switching. If the MLS-RP is the RSM, RSFC, MSFC, or MSFC II, no configuration is needed for the switch for which the MLS-RP resides. Configuring the switch is necessary when the following are true:
  • The MLS-RP is an external router.
  • The aging time for MLS cache entries is other than the default.

If a switch has been disabled for Layer 3 switching, enter the following command in privileged EXEC mode on the switch.

Switch> (enable) set mls enable

The running configuration example in the Figure states that the MLS-SE is configured to support multilayer switching.

Enter the set mls disable command to disable MLS on the MLS-SE. This command stops the MLS-SE from processing the MLSP messages from the MLS-RP, and purges all existing MLS cache entries in the switch.