Troubleshooting – 2 Points
There are two faults in the initial configurations. I actually found three and the one that was not listed in the IE Solution Guide was the most devious of the three.
1) sw3 and sw4 both have an intitial configuration error on their fa0/16 interfaces:
ip address 184.108.40.206 255.255.255.0
The “no switchport” command for is needed for these routed interfaces. Without this command, IOS chokes on the ‘ip address’ command and you’re left with an ordinary L2 interface.
2) Incorrect IP addresses on SVIs on sw1:
sw1(config)#do sh ip int br | e ass
Interface IP-Address OK? Method Status Protocol
Vlan27 220.127.116.11 YES manual up up
Vlan72 18.104.22.168 YES manual up up
Loopback0 22.214.171.124 YES manual up up
You just need to swap the IP addresses.
3) VTP password on sw2 is CISC0 (last character is a zero) rather than CISCO. This is the fault that is not listed in the solution guide. I occurs on only one switch, and that switch is the only one that has trunking to the other three switches, so if this was an unintended fault, it was a doozy. 🙂