02-01-2008 06:12 AM - edited 03-05-2019 08:52 PM
Hi All
I have a problem with my cisco3750 switch..
If I issue sh spanning-tree summary I get
(look attach)
In particular for vlan 242 and 243
VLAN0242 - 245 - 249 - 253 -1872756559 1012957184
VLAN0243 - 245 - 249 - 253 -1872756559 1012957184
if I issue sh spanning-tree vlan 242 or 243 it gives
sw-com1-be#sh spanning-tree vlan 242
VLAN0242
Spanning tree enabled protocol ieee
Root ID Priority 4338
Address 0005.dd27.3440
Cost 4
Port 1000 (StackPort1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 45298 (priority 45056 sys-id-ext 242)
Address 0019.3027.f580
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa1/0/9 Desg FWD 19 128.11 P2p
As you see no root port in the output... but the infrastructure works well machine in the same vlan (242 or 243) cona communicate...
What happens ???
Regards
Giuseppe
02-01-2008 08:25 AM
Please attach the whole show spanning-tree output, not just the summary.
__
Edison.
02-01-2008 08:47 AM
02-01-2008 09:19 AM
I never seen the stackport listed in the spanning-tree information.
Are you having multiple 3750 switches connected using the stackwise cable and you also used the front switchports for inter-switch connection?
Can you post the output from typing show switch and show cdp neighbor detail
02-04-2008 02:00 AM
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: