spanning tree inconsistency

[elite2010]

Hi,

VLAN0178 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 8183 last change occurred 01:42:49 ago
from GigabitEthernet1//3

gi 1/3 is connected to an access switch via trunk 

if i go to   access switch   here is the result 

VLAN0178 is executing the rstp compatible Spanning Tree protocol
Number of topology changes 8183 last change occurred 01:43:50ago
from GigabitEthernet1//5

(dist)gi1/3-------------------gi1/5(access )

How to troubleshoot 

Thanks

[Kevin Dorrell]

Could you do a show spanning-tree vlan 178 on each one please?  Also, it mght be useful to know the interface configurations of the trunk between the two.

[elite2010]

Hi,

here is the details 

From distribution switch
--------------------------------
spanning-tree vlan 1-4094 priority 0


interface TenGigabitEthernet1/8/13
switchport
switchport mode trunk
storm-control multicast level 1.00
storm-control action trap

There are multiple switch connected

Port 2053 (TenGigabitEthernet1/1/5) of VLAN000178 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.2053.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2053, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 477684, received 2

Port 2055 (TenGigabitEthernet1/1/7) of VLAN000178 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.2055.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2055, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 2589560, received 5

Port 2689 (TenGigabitEthernet1/6/1) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2689.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2689, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 7345800, received 420

Port 2720 (TenGigabitEthernet1/6/32) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2720.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2720, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 7345174, received 8

Port 2819 (TenGigabitEthernet1/8/3) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2819.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2819, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 5020533, received 145

Port 2820 (TenGigabitEthernet1/8/4) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2820.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2820, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 24889759, received 4

Port 2823 (TenGigabitEthernet1/8/7) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2823.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2823, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 9224566, received 12314

Port 2824 (TenGigabitEthernet1/8/8) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2824.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2824, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 24894835, received 4

Port 2825 (TenGigabitEthernet1/8/9) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2825.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2825, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 24894166, received 5

Port 2826 (TenGigabitEthernet1/8/10) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2826.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2826, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 7361546, received 5743

Port 2827 (TenGigabitEthernet1/8/11) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2827.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2827, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049145, received 4

Port 2829 (TenGigabitEthernet1/8/13) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2829.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2829, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 15708042, received 8038

Port 2830 (TenGigabitEthernet1/8/14) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2830.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2830, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 24849421, received 1514

Port 2831 (TenGigabitEthernet1/8/15) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2831.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2831, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049749, received 6

Port 2832 (TenGigabitEthernet1/8/16) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2832.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2832, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 1259722, received 9

Port 2833 (TenGigabitEthernet1/8/17) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2833.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2833, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 238772, received 11

Port 2834 (TenGigabitEthernet1/8/18) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2834.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2834, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049459, received 1101

Port 2835 (TenGigabitEthernet1/8/19) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2835.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2835, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 24888661, received 1393

Port 2836 (TenGigabitEthernet1/8/20) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2836.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2836, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 10486441, received 2

Port 2837 (TenGigabitEthernet1/8/21) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2837.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2837, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 4811958, received 6

Port 2838 (TenGigabitEthernet1/8/22) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2838.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2838, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 8941558, received 5

Port 2843 (TenGigabitEthernet1/8/27) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.2843.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2843, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 5382100, received 2

Port 4101 (TenGigabitEthernet2/1/5) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4101.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4101, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 7363415, received 2

Port 4105 (TenGigabitEthernet2/1/9) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4105.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4105, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049143, received 2

Port 4866 (TenGigabitEthernet2/8/2) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4866.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4866, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 1259886, received 4

Port 4867 (TenGigabitEthernet2/8/3) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4867.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4867, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049748, received 2

Port 4868 (TenGigabitEthernet2/8/4) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4868.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4868, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 365
Link type is point-to-point by default
BPDU: sent 25049744, received 417

Port 4869 (TenGigabitEthernet2/8/5) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4869.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4869, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 238772, received 2

Port 4870 (TenGigabitEthernet2/8/6) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4870.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4870, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 278
Link type is point-to-point by default
BPDU: sent 25049739, received 314

Port 4871 (TenGigabitEthernet2/8/7) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4871.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4871, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 338
Link type is point-to-point by default
BPDU: sent 25049046, received 379

Port 4872 (TenGigabitEthernet2/8/8) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4872.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4872, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 5215696, received 5

Port 4873 (TenGigabitEthernet2/8/9) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4873.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4873, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 10486441, received 2

Port 4875 (TenGigabitEthernet2/8/11) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4875.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4875, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 4811959, received 1

Port 4876 (TenGigabitEthernet2/8/12) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4876.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4876, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 1259725, received 1

Port 4877 (TenGigabitEthernet2/8/13) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4877.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4877, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1927
Link type is point-to-point by default
BPDU: sent 22896408, received 2196

Port 4878 (TenGigabitEthernet2/8/14) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4878.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4878, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 7363297, received 7

Port 4879 (TenGigabitEthernet2/8/15) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4879.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4879, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 8941557, received 2

Port 4880 (TenGigabitEthernet2/8/16) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4880.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4880, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 8941589, received 6

Port 4881 (TenGigabitEthernet2/8/17) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4881.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4881, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 5382100, received 2

Port 4882 (TenGigabitEthernet2/8/18) of VLAN000178 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.4882.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4882, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default, Peer is STP
BPDU: sent 477686, received 2

Port 4883 (TenGigabitEthernet2/8/19) of VLAN000178 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.4883.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4883, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 308428, received 3

Port 4884 (TenGigabitEthernet2/8/20) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4884.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4884, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 8941499, received 4

Port 4886 (TenGigabitEthernet2/8/22) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4886.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4886, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 5020580, received 3

Port 4890 (TenGigabitEthernet2/8/26) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4890.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4890, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049050, received 5

Port 4891 (TenGigabitEthernet2/8/27) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4891.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4891, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25049145, received 5

Port 4892 (TenGigabitEthernet2/8/28) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4892.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4892, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 25316004, received 5

Port 4893 (TenGigabitEthernet2/8/29) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4893.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4893, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 9228628, received 7

Port 4895 (TenGigabitEthernet2/8/31) of VLAN000178 is designated forwarding
Port path cost 4, Port priority 128, Port Identifier 128.4895.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4895, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 2589561, received 2

Port 4896 (TenGigabitEthernet2/8/32) of VLAN000178 is designated forwarding
Port path cost 2, Port priority 128, Port Identifier 128.4896.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.4896, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 14382723, received 3

Port 5764 (Port-channel10) of VLAN000178 is designated forwarding
Port path cost 1, Port priority 128, Port Identifier 128.5764.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.5764, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 2031788, received 0





From one of the access switch
-------------------------------------------

interface TenGigabitEthernet1/1/3
end


VLAN000178is executing the rstp compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 9, address 40a6.e8de.d900
Configured hello time 2, max age 20, forward delay 15, transmit hold-count 6
Current root has priority 9, address f44e.0608.7000
Root port is 55 (TenGigabitEthernet1/1/3), cost of root path is 2
Topology change flag not set, detected flag not set
Number of topology changes 22988 last change occurred 00:28:24 ago
from TenGigabitEthernet1/1/3
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0, aging 300

Port 55 (TenGigabitEthernet1/1/3) of VLAN000178is root forwarding
Port path cost 2, Port priority 128, Port Identifier 128.55.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 128.2829, designated path cost 0
Timers: message age 16, forward delay 0, hold 0
Number of transitions to forwarding state: 2007
Link type is point-to-point by default
BPDU: sent 8038, received 15702185

Port 174 (GigabitEthernet3/0/46) of VLAN000178is designated forwarding
Port path cost 100, Port priority 128, Port Identifier 128.174.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 32777, address 40a6.e8de.d900
Designated port id is 128.174, designated path cost 2
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 541
Link type is shared by default
BPDU: sent 1795975, received 0

Port 247 (TenGigabitEthernet4/1/3) of VLAN000178is alternate blocking
Port path cost 2, Port priority 128, Port Identifier 128.247.
Designated root has priority 9, address f44e.0608.7000
Designated bridge has priority 9, address f44e.0608.7000
Designated port id is 144.781, designated path cost 0
Timers: message age 15, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 2198, received 22890533

Thanks

[bogdan_butucel]

It would be useful to see the outputs of show interface switchport for the trunk interfaces.

[elite2010]

Hi,

Access switch says the cause of tcn change  is  the distribution switch , distribution switch says the cause of change the access switch , 

Now I don't know whcih interfaces causing the issues 

Thanks

[Kevin Dorrell]

On your access switch, do you have BPDU guard on the access ports?  If your problem is due to something on the access ports trying to claim root, that would prevent it.  I would look carefully at what is on G3/0/46.

Only once you have tracked down the problem:

1. You could put root guard on the distribution switch g1/1/3, but beware - if the access switch then tries to claim root, that would cut off the access switch.
2. Access switch g4/1/3 is interesting - is it an standby link to the distribution switch?  If so, you could bundle the two links as a channel, which would give you more bandwidth and faster convergence in the event of a link failure.

[Rolf Fischer]

VLAN000178is executing the rstp compatible Spanning Tree protocol
 Bridge Identifier has priority 32768, sysid 9, address 40a6.e8de.d900
 Configured hello time 2, max age 20, forward delay 15, transmit hold-count 6
 Current root has priority 9, address f44e.0608.7000

This output belongs to VLAN 9, not 178. It's not easy to help you when you fake information.

interface TenGigabitEthernet1/1/3
 end

This is the uplink config on your access switch? You should apply a proper trunk config!

Port 55 (TenGigabitEthernet1/1/3) of VLAN000178is root forwarding
 Port path cost 2, Port priority 128, Port Identifier 128.55.
 Designated root has priority 9, address f44e.0608.7000
 Designated bridge has priority 9, address f44e.0608.7000
 Designated port id is 128.2829, designated path cost 0
Timers: message age 16, forward delay 0, hold 0
 Number of transitions to forwarding state: 2007
 Link type is point-to-point by default
 BPDU: sent 8038, received 15702185

The uplink doesn't look very stable. Have you already checked cabling and SFPs?

If it is a fiber connection you may want to enable UDLD.

Apart from the alternate port (TenG 4/1/3), do you see other port(s) with significant amounts of received BPDUs?

[elite2010]

Hi,

Thank you for the reply , I took the output in random interval time . i have not seen the root port is changing . Still udld required ?

Thanks

[Rolf Fischer]

Still udld required ?

It's not required but recommended on fiber links.

If you want to collect some more information about the topology changes, you could enable 'spanning-tree logging' (global config command, if supported) on the access-switch (buffer logging should be enabled). The corresponding syslog-messages should help us understand what's going on.

Btw, what are the hardware platforms and software versions on the access- and distribution-switch? And what type of devices are the non-rapid peers of the distribution switch?

[paul driver]

Hello

One thing you may wish to check is to make sure you have port-fast enabled on all access ports especially for that vlan.

If you don't then these access ports will transition through the stp process every time it goes up/down such as when a host connects and then disconnects.

res
paul