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Spanning tree issue:BKN

kigopina
Level 1
Level 1

Hi,

Here's the output from a show spanning-tree command on a 3550:

sh spanning-tree vlan 800

VLAN0800

Spanning tree enabled protocol ieee

Root ID Priority 33568

Address 0005.313e.5600

This bridge is the root

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 33568 (priority 32768 sys-id-ext 800)

Address 0005.313e.5600

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 300

Interface Port ID Designated Port ID

Name Prio.Nbr Cost Sts Cost Bridge ID Prio.Nbr

---------------- -------- --------- --- --------- -------------------- --------

Gi0/3 128.3 19 BKN* 0 33568 0005.313e.5600 128.3

What does the BKN* stand for and how does this condition occur?

Thanks.

1 Reply 1

Prashanth Krishnappa
Cisco Employee
Cisco Employee

Broken state (BKN*) is for an inconsistency status.

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/12111bex/cmdref/show1.htm#18716

Check for any configuration mistakes