09-27-2006 03:27 AM - edited 03-03-2019 05:15 AM
When performing a "show spanning-tree" on a new pair of 3750 switches there is an interface displayed that I hadn't seen on any of my other 3750s, it's the St1 interface seen below (sorry...I'm sure the format will be messed up). Does anyone know what this interface is or point me to documentation that explains it?? Having trouble finding anything about it.
Thanks...Jeff
NCWS1SWZ4S2#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 8192
Address 000f.f88e.b001
Cost 6
Port 680 (Port-channel9)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0017.e088.5580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- ------------------------
Gi1/0/1 Desg FWD 4 128.1 P2p
Gi1/0/2 Desg FWD 4 128.2 P2p
Gi1/0/3 Desg FWD 4 128.3 P2p
Po2 Altn BLK 3 128.624 P2p
Po9 Root FWD 3 128.680 P2p
St1 Desg FWD 19 128.1000 P2p
09-27-2006 05:11 AM
I found it....it is the stack port. Not sure why I am seeing it on this stack and not others, but at least I know what it is!
JEff
09-27-2006 10:03 PM
Could it be the StackWise cable linking the switch you're looking at with the Root?
09-28-2006 03:45 AM
That's exactly what it was, not sure why I'm not seeing it on my other 3750 stacks, guessing an IOS difference.
Thanks...Jeff
09-28-2006 08:35 AM
Do you have any debug enabled on this switch?
Regards,
Francois
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide