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I have a configuration where two Cisco routers are in different subnets. The first one is in 192.168.0.0/24 and the second one is in 192.168.1.0/24. The routers are connected via serial by the 192.168.2.0/30.

My problem is that I cannot ping computers from 192.168.0.0/24 to 192.168.1.0/24. I set a static route to 192.168.2.0/30 in order to make all traffic from 192.168.1.0/24 go to serial's router.

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Which Cisco routers did you use? If the serial line mean to transfer data or it is a console port? Can you show up the routing tables on the ciscos (on both of them). – Hennes Sep 13 '12 at 14:45
you need two routes for this to work, one in each direction – wmz Sep 13 '12 at 15:45
@wmz I have two routers @Hennes I dont have right know the table routes, but I remember the commands: on interface f0/0 ip address 192.168.0.254 255.255.255.0 on interface s0/0 ip address 192.168.2.2 255.255.255.252 on config t ip route 192.168.2.0 255.255.255.252 s0/0 and that's all I do on one router, same in the other but with different ip address, the routers are cisco router 1700 – poz2k4444 Sep 13 '12 at 15:49
2  
No - two routes - two route entries, one on each router. And the ones you have are wrong (redundant) - router already knows how to route to network on a directly connected interface, no need to tell it that. You need to define how to reach networks .0.0 and .1.0. One entry per router. – wmz Sep 13 '12 at 16:12
Please post copy-pasted output of ifconfig and route (or equivalent) for each router, so it will be possible to tell what's wrong. Router model might be useful too. – Eroen Sep 13 '12 at 16:29
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1 Answer

up vote 2 down vote accepted

The correct way to do this, was setting the static route to the other network:

in the first router I have this:

interface f0/0 ip address 192.168.0.254 255.255.255.0
interface s0/0 ip address 192.168.2.1 255.255.255.252
ip route ip route 192.168.1.0 255.255.255.0

in the second router I have this:

interface f0/0 ip address 192.168.1.1 255.255.255.0
interface s0/0 ip address 192.168.2.2 255.255.255.252
ip route ip route 192.168.0.0 255.255.255.0

I have done this wrong cause I put the static route like this:

ip route 192.168.2.0 255.255.255.252

Thanks to @wmz that tell me the right way to do this

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