Hello, I have not been able to connected my 3750 to my 2821 through the Gi0/1 fixed interface on the 2821. The 2821 has 1 serial interface, 2 fixed Gigabit Ethernet Interfaces and a card with 9 Fastethernet interfaces. The serial is used to connect to my WAN. I can connected the 3750 to any one of the ports of the 9 FastEthernet card when i configure it as a trunk. I set up the Gi0/1 port on the 2821 the same way, the router doesn't see the switch. I can get the router's mac-address from the switch however. The 2821 has VLANs on it. The 3750 has similar VLANs on it. How do i configure the Gi0/1 for it to see the switch?
here is the current config for desired port:
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
ip route-cache flow
no mop enabled
Here is the config for the working port
switchport mode trunk
switchport voice vlan 6
I did try putting switchport mode trunk on int Gi0/1 but had no joy doing that.
I tried to give that port an ip address but would get overlap errors with VLAN1.