Cannot assign IP address to serial Inter. (Packet Tracer)

SurferdudeHB

I'm trying to assign IP address 192.168.3.1 to my router's serial interface 2/0 but the IOS says it's overlapping with Fasthernet 0/0.
What I am doing wrong here?

FastEthernet0/0 192.168.3.20 YES manual up down

Router01(config)#interface serial 2/0
Router01(config-if)#ip address 192.168.3.1 255.255.255.0
% 192.168.3.0 overlaps with FastEthernet0/0


-Edit-
ah nevermind I was supposed to assign 192.168.2.1 to the serial not 192.168.3.1

millworx

Good you figured it out, this happens when you try to assign IP's with overlapping subnets on different interfaces. You can't do that, because the router won't know which interface to send the network traffic to.