i need help again. i connect a 1720 router from the ethernet port to one of the 2820 switch port using a cross cable. the ip address i set for the router is 10.169.226.145 and the ip address i set for the switch is 10.169.226.144. the subnet mask is 255.255.254.0. i configure rip for the router. but when i key in the command show interface fastethernet 0 it shows line is up line protocol is down. how should i solve the problem? please advice. thanks a lot in advance.
The cable connecting the router LAN interface to the switch should be a straight-through cable, not a crossover cable pinout. The router patches into a switch just like a computer does.
Also check the configuration of the switch port and the router LAN, to make sure there is not a speed or duplex mismatch. Either set both ends to autodetect speed and duplex (easier), or manally set them to run at the desired speed and duplex (recommended).
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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