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Catalyst 6500 Series Switch Command Reference—Release7.6
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Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands set spantree macreduction
set spantree macreduction
To enable or disable the spanning tree MAC address reduction feature, use the set spantree
macreduction command.
set spantree macreduction enable | disable
Syntax Description
Defaults The default is MAC address reduction is disabled.
Command Types Switch command.
Command Modes Privileged.
Usage Guidelines The MAC address reduction feature is used to enable extended-range V LAN ide ntifica tio n and allows
the switch to support a large number of spanning tree instances with a very limited number of MAC addresses
and still maintain the IEEE 802.1D bridge-ID requirement for each STP instance.
You cannot disable this feature if extended-range VLANs exist.
You cannot disable this feature on chassis with 64 MAC addresses.
Examples This example shows how to disable the MAC address reduction feature:
Console> (enable) set spantree macreduction disable
MAC address reduction disabled
Console> (enable)
Related Commands show spantree
enable Enables MAC address reduction.
disable Disables MAC address reduction.