two mst instances

Discussion in 'Cisco' started by guest, Oct 24, 2006.

  1. guest

    guest Guest

    Hi,

    would this work? and Is this a good design or would a single instance
    be better?

    Root bridge is A Root bridge is B

    |C E
    | |
    A----B A---B--G
    | |
    | F
    D

    MST instance 1 MST instance 2


    Configuration:

    A switch
    Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 1 vlan 1-3,43-45,94-98,253
    Instance 2 vlan 4-8,10-15,94-98
    Spanning-tree mst 1 root primary
    Spanning-tree mst 2 root secondary
    Exit

    B switch
    Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 2 vlan 4-8,10-15,94-98
    Instance 1 vlan 1-3,43-45,94-98,253
    Spanning-tree mst 2 root primary
    Spanning-tree mst 1 root secondary

    C switch
    Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 1 vlan 1-3,43-45,94-98,253
    Instance 2 vlan 4-8,10-15,94-98


    D switch
    Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 1 vlan 1-3,43-45,94-98,253
    Instance 2 vlan 4-8,10-15,94-98


    E Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 2 vlan 4-8,10-15,94-98
    Instance 1 vlan 1-3,43-45,94-98,253

    F Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 2 vlan 4-8,10-15,94-98
    Instance 1 vlan 1-3,43-45,94-98,253


    G Switch(Config)# spanning-tree mode mst
    Spanning-tree mst configuration
    Name manila2
    Revision 0
    Instance 2 vlan 4-8,10-15,94-98
    Instance 1 vlan 1-3,43-45,94-98,253
     
    guest, Oct 24, 2006
    #1
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.