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| Sun Ethernet Fabric Operating System ### STP Administration Guide

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## Display the MST Configuration and Status

1. Display the status and configuration details of MST.

       SEFOS# show spanning-tree mst configuration

       Name            [00:04:02:03:04:01]
       Revision        0
       Instance        Vlans mapped
        --------      ------------------------------------------
         0              1-1024,1025-2048,2049-3072,3073-4094
        -------------------------------------------------------

2. View the spanning tree details for when an instance is not created on a port.

       SEFOS# show spanning-tree mst detail

        ## MST00
       Bridge     Address 00:04:02:03:04:01    Priority 32768
       Root       Address 00:04:02:03:04:01    Priority 32768
                  We are the Root for CST
                  Port 0        ,  path cost 0
       IST Root   Address 00:04:02:03:04:01    Priority  32768
                  Path cost 0
       Configured Forward delay 15, Max age 20, Max hops 20
       Operational Forward delay 15, Max age 20

       Ex0/1 of MST00 is Designated, Forwarding
       Port info             port id 128.1             priority 128 cost 200000
       Designated root       address 00:04:02:03:04:01   priority 32768 cost 0
       Designated ist master address 00:04:02:03:04:01   priority 32768 cost 0
       Designated bridge     address 00:04:02:03:04:01   priority 32768 portid 128.1
       Configured Forward delay 15, Max age 20, Max hops 20
       Operational Forward delay 15, Max age 20
       Bpdus sent 36 , Received 0

3. View the spanning tree details for when instance 1 is mapped to `VLAN 1`.

       SEFOS# show spanning-tree mst detail

        ## MST00Bridge     Address 00:01:02:03:04:01    Priority 32768Root       Address 00:01:02:03:04:01    Priority 32768           We are the Root for CST           Port 0        ,  path cost 0IST Root   Address 00:01:02:03:04:01    Priority  32768           Path cost 0Configured Forward delay 15, Max age 20, Max hops 20Operational Forward delay 15, Max age 20Ex0/1 of MST00 is Designated, Forwarding     Port info             port id 128.1               priority 128   cost 200000Designated root       address 00:01:02:03:04:01   priority 32768 cost 0Designated ist master address 00:01:02:03:04:01   priority 32768 cost 0Designated bridge     address 00:01:02:03:04:01   priority 32768 portid 128.1Configured Forward delay 15, Max age 20, Max hops 20Operational Forward delay 15, Max age 20Bpdus sent 127 , Received 0 ## MST01Vlans mapped:    1Bridge     Address 00:01:02:03:04:01    Priority 32768Root       Address 00:01:02:03:04:01    Priority 32768Root       this switch for MST01Ex0/1 of MST01 is Designated, ForwardingPort info         port id 128.1               priority 128   cost 200000Designated root   address 00:01:02:03:04:01   priority 32768 cost 0Designated bridge address 00:01:02:03:04:01   priority 32768 port id 128.1

       SEFOS# show spanning-tree mst 1

       ## MST01Vlans mapped:    1Bridge     Address 00:01:02:03:04:01    Priority 32768Root       Address 00:01:02:03:04:01    Priority 32768Root       this switch for MST01Interface Role       Sts          Cost     Prio.Nbr Type--------- ----       ---          ----     -------- ----Ex0/1    Designated  Discarding   200000   128.1    Link Type is SharedEx0/2    Designated  Discarding   200000   128.2    Link Type is Shared

       SEFOS# show spanning-tree mst interface extreme-ethernet 0/1

       Ex0/1 of MST00 is Designated, ForwardingEdge port: noLink type: SharedPort Hello Timer: 2 SecBpdus sent 233 , Received 270Instance  Role         Sts          Cost     Prio.Nbr--------  ----         ---          ----     --------0         Designated   Forwarding   200000   128.11         Designated   Forwarding   200000   128.1

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