MAC address reduction on IOS switches

Discussion in 'Cisco' started by lockjaw02, Apr 15, 2008.

  1. lockjaw02

    lockjaw02 Guest

    What is the command to enable MAC address reduction on the 6500, or is
    it done when you enable extended system-id? It doesn''t appear to be
    in any Cisco docs for IOS switches; the CatOS command is "set spantree
    macreduction enable."
    lockjaw02, Apr 15, 2008
    #1
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  2. lockjaw02

    Merv Guest

    On Apr 15, 12:37 pm, lockjaw02 <> wrote:
    > What is the command to enable MAC address reduction on the 6500,
    > or is it done when you enable extended system-id?


    see Comparison of the Cisco Catalyst and Cisco IOS Operating Systems
    for the Cisco Catalyst 6500 Series Switch

    Because the Cisco Catalyst OS and Cisco IOS Software support the
    creation of 4094 Layer 2 VLANs, a MAC-address reduction feature must
    be enabled so that the system can allocate a limited number of system
    MAC addresses more efficiently. The following commands enable this
    feature:
    Cisco Catalyst OS Cisco IOS Software
    set spantree macreduction enable IOS(config)# spanning-
    tree extend system-id
    Merv, Apr 15, 2008
    #2
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