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STP-Switch can't communicate with each other

smartd1011
Level 1
Level 1

I added this STP network(3 L3 switches) into my exiting Route Redistribution network. I assigned trunk ports to appropriate  Gig. port to create trunk link between switches. I also issued command: spanning-tree vlan 10(20)  to each trunk port. I added a laptop to SW3 and assigned ip address(I don't have default gateway address, so used lo0 5.5.5.5 instead. I think I'm wrong ).

Now, I can't ping from one switch to another(except SW1 to SW2 through R1 and R2). I also can't ping from laptop to any switch or Vise Versa. I tried to debug for a couple of hr. but no luck. 

I attached the topology and config. file. 

I hope someone can help me find a clue.

 

Thank you!

1 Reply 1

Joseph W. Doherty
Hall of Fame
Hall of Fame

Duplicate post - see https://supportforums.cisco.com/discussion/12400636/stp-switch-cant-communicate-each-other

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