11-25-2008 12:47 AM - edited 03-06-2019 02:39 AM
Hi,
I have configured core sw as root bridge for VLAN 64 (4096).
Core sw config:
spanning-tree vlan 64 priority 4096
I have checked the root bridge for VLAN 64 from access switch
ACC-SW1#sh spanning-tree vlan 64
VLAN0064
Spanning tree enabled protocol rstp
Root ID Priority 4160
Address 0012.00d0.1100
Cost 3
Port 56 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32832 (priority 32768 sys-id-ext 64)
Address 0023.ab2a.c280
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 3 128.56 P2p
My question is why it is showing rott bridge as 4160..it suppose to show 4096 right??
Regards
sateesh
11-25-2008 01:01 AM
Hi,
The priority is Priority 4096 + Vlan ID=4096 + 64.
That is the extended system id.
If you want disable it, you must issue the command:
no spanning-tree extend system-id
I hope this helps.
Best regards.
Massimiliano.
11-25-2008 02:29 AM
Hi,
Thanks for prompt response. I have tried in the same way..But still its showing like that only..
Regards
sateesh
11-25-2008 02:33 AM
Hi,
You have to issue this command on root bridge.
Best regards.
Massimiliano.
11-25-2008 02:48 AM
HI,
I have issued the command on root bridge only and rebooted also
Still its like that..
Regards
sateesh
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