Hi everybody
I hope you are doing fine.
R1 e1--------f1/1 Sw2
R1 is router, e1 routed port, sw2 layer 2 switch,
sw2 is the root of vlan 1 ( no other switch so it makes sense)
sw2#show spanning-tree vlan 1
VLAN1 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, address c001.0714.0000
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag set, detected flag set
Number of topology changes 1 last change occurred 00:00:34 ago
from FastEthernet1/1
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 42 (FastEthernet1/1) of VLAN1 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.42.
Designated root has priority 32768, address c001.0714.0000
Designated bridge has priority 32768, address c001.0714.0000
Designated port id is 128.42, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
BPDU: sent 32, received 0
Consider the highlighted text above.
Topology change is 35 , notification 2
Sw2 never sends or receive 35 topology change or 2 notifications but yet they always show up
is there any reason ?
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