How to connect two physical (!) networks in CISCO?

Question

Cisco

Hello, straight to the point. There is CISCO 2801 with HWIC-1FE board (one more physical interface). It (1FE) is recognized as fa0/1/0. fa0/0 - wan. fa0/1 - lan (100.100.200.0). But another router (generally any) is connected to fa0/1/0, and a second LAN comes into it, with its own DHCP, etc. (100.100.100.0). The task is that from lan it would be possible to get into the network (100.100.100.0). What I didn’t look for was talking about vlan, but everything is physical here ... I thought in the direction of ip route, but I can’t finish it ...

Answer 1

the task is to finally read the textbook or go to courses on the basics of networks.
and so yes, it is necessary to register ip route for each of the networks.

Answer 2

router eigrp 1
passive-interface default
no passive-interface ***
no auto-summary
eigrp router-id ***
network 1 wildcard
network 2 wildcard
network N
...
Something like this... you need to route them... Of course, you can write static routes ...

What I didn’t look for was talking about vlan, but everything is physical here ... I thought in the direction of ip route, but I can’t finish it ...

I think the reason is that the theoretical base is very lacking. What's the difference physical or not?
You are aware that the physical is the default vlan, which is usually VLAN ID 1. Raise the trunk between the routers and drive vlans there. On routers, there are 2 interests, not because one IN and the second OUT, but so that the bandwidth does not suffer, and it is possible to physically connect more than one Link, more is not really required. Routing is a feature, and router ports are usually extended by switches.