Hi guys,
I always thought that if you want say a L3 3550 switch om say port 1 to connection to say port 1 on a L2 2950 switch the port config would be something like this:
3550:
interface fastethernet 0/1
switchport access vlan 100
switchport mode dynamic desirable
2950:
interface fastethernet 0/1
switchport access vlan 100
switchport mode trunk
but I'm sure I'm doing it wrong becasue I can get the link from coming up for down on both ends of the link; if i plug both ports into a unused port on he Procurve switch port boths come up so I know they work.... What am I doing wrong?

I'm basically wanting to get the 2950's vlan of 100 to connect to the 3550 so I can route the traffic through the router's. I've been making the network in reverse from the routers to the L3's and now to the L2's and the trunking between the L3's and L2's is my current hurdle.