From: Robin Johnson (Rob.Johnson@dxi.net)
Date: Fri Dec 10 2004 - 12:30:45 GMT-3
Question on MST on 3550s
Whilst setting up mst to overcome the 128 stp limitations for a Lab I
noticed
that every vlan from 128 - to say 1000 shows up in the running-config as
"no spanning-tree vlan XXX"
Ive tested the mst by mapping vlan 1-1000 to instance 1 and can see from the
output that vlan 200 for example is participating in mst correctly and gig
0/1 is blocking so am a bit confused as to why the running-config would lead
me to believe other wise.
Answers on a postcard please:-)
Config example
spanning-tree mode mst
spanning-tree extend system-id
no spanning-tree vlan 129
no spanning-tree vlan 130
no spanning-tree vlan 200
etc etc
spanning-tree mst configuration
name XXX
revision 1
instance 1 vlan 1-1000
VLAN example
Switch#sh spanning-tree vlan 200
MST01
Spanning tree enabled protocol mstp
Root ID Priority 24577
Address 0011.5cdb.7a00
Cost 40000
Port 12 (GigabitEthernet0/12)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0011.5cdb.8580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Gi0/1 Altn BLK 20000 128.1 P2p
Gi0/12 Root FWD 20000 128.12 P2p
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