I have a Catalyst 2924 and a Catalyst 2950. Both are in the same VTP domain. I have set port 22 on the 2924 and port 24 on the 2950 as trunk ports using 802.1q encapsulation. I then shut down interface vlan1 and created an interface vlan254. The addressing is:
172.28.250.20 in vlan 254 for the 2924
172.28.250.21 in vlan 254 for the 2950
I set the ip default gateway as 172.28.250.1
the ports register as "up", but if I do a "show cdp neighbors" I can see the other switch. However, I cannot ping accross. Now if I shut down vlan254 and assign the same ip address to vlan1, then bring up vlan1, I can ping the other switch. What gives? The vlan is defined in the database on both switches. What's the difference?