05-07-2010 05:56 AM - edited 03-06-2019 10:59 AM
Hi All,
Currently, I am facing some STP issue need to know what is the problem for my STP? Anyone know?...thanks
SW#show spanning-tree vlan 360
VLAN0360
Spanning tree enabled protocol ieee
Root ID Priority 32768
Address 0022.557c.5de8
Cost 4
Port 1669 (Port-channel30)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address 00d0.03e0.2d68
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Gi9/18 Desg BKN*19 128.1042 P2p *LOOP_Inc
Po30 Root FWD 4 128.1669 P2p
Po31 Desg FWD 4 128.1670 P2p
SW#
05-07-2010 06:45 AM
Hi there,
It looks like the port has put itself in "Loop Inconsistent" state. Are you running the Spanning Tree Loop Guard config on the port?
If so, and you are sure that the interface is functioning as it should be (i.e in full working order) I have heard that disabling and re-enabling Loop Guard on the port can sometimes clear errors...
Cheers
Jonathan
05-07-2010 07:39 AM
Hi Jonathan,
Thanks for your reply.
The port configuration just a normal trunk, no any Loop guard feature enable. But SW001 and SW004 have disabled STP gloablly.
SW001and SW004 only allowed vlan 350 - 359 but SW002 and SW003 only allowed vlan 350 - 360
swithport mode trunk
swithport allowed vlan 350-360
SW001 --> SW002 ---- SW003 <-- SW004
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