Question about connectivity

nice343

the network between the two routers is 192.168.2.0/24
R1 interface f0/0 is 192.168.2.2 and R2 interface f0/1 192.168.2.3

the network connecting to the LAN is 192.168.1.0/24. R2 f0/0 is 192.168.1.1

I have configured the switch with the "ip default-gateway 192.168.1.1" command and configured
Ip route 0.0.0.0 0.0.0.0 f0/1 on R2 but for some reason I still cannot ping 192.168.2.2 (R1) from the switch??? Am 1 doing something wrong?

mikearama

It's the default route... change it from

Ip route 0.0.0.0 0.0.0.0 f0/1

to

Ip route 0.0.0.0 0.0.0.0 f0/0

You have everything defaulting to away from the router... f0/0 will default everything to the router. That's the only way to cross subnets.

Netstudent

You needa route back to the LAN. Sure the data can get there, but how will it get back? I think any one of those routes Mike suggested would work, they would just have a different AD. You still needa route on R2 pointing to your LAN subnet.

mikearama

Hmmm, I like NS's idea better.

nice343

mikearama wrote:

It's the default route... change it from

Ip route 0.0.0.0 0.0.0.0 f0/1

to

Ip route 0.0.0.0 0.0.0.0 f0/0

You have everything defaulting to away from the router... f0/0 will default everything to the router. That's the only way to cross subnets.

I changed the deafult route on R2 to 1p route 0.0.0.0 0.0.0.0 192.168.2.2(next hop routerR1)

nice343

I tried using the f0/0 on the Ip route and it would not work

bighornsheep

nice343 wrote:

I changed the deafult route to 1p route 0.0.0.0 0.0.0.0 192.168.2.2(next hop routerR1)

it is till not working

Make sure your switch has

ip default-network 192.168.1.1

and your R1 should have

ip route 0.0.0.0 0.0.0.0 192.168.2.3

Your R2 shouldn't have ANY default route.

nice343

bighornsheep wrote:

nice343 wrote:

I changed the deafult route to 1p route 0.0.0.0 0.0.0.0 192.168.2.2(next hop routerR1)

it is till not working

Make sure your switch has

ip default-network 192.168.1.1

and your R1 should have

ip route 0.0.0.0 0.0.0.0 192.168.2.3

Your R2 shouldn't have ANY default route.

I already have this command on the switch

ip default-network 192.168.1.1

plus I don't want to create a default route on R1. I want the deafault route to be on R2

Netstudent

R2 already knows about all the networks because they are directly connected. Thats why you don't need a route on R2. I don;t think it would hurt to put it in there anyways, especially if R1 was your edge router. Can you post the running-config?

bighornsheep

nice343 wrote:

bighornsheep wrote:

and your R1 should have

ip route 0.0.0.0 0.0.0.0 192.168.2.3

Your R2 shouldn't have ANY default route.

I don't want to create a default route on R1. I want the deafault route to be on R2

You can configure whatever you want, but it won't work like you are expecting it to. Your switch (plus workstations connected to it) won't be able to ping R1, and other connections on R1 also will not be able to ping the switch and its devices unless you configure your routes properly. If you do not have a default route on R1, it the ping (and any packet in general) will fail on the return path because R1 doesn't know what to do with packets destined for 192.168.1.0/24

The only reason you would configure a default route on R2 is if it connects to another network such as the internet.

Netstudent

If you can ping R2's fa0/1 and not R1's fa0/0, then you know it is the route on R1. IF you cannot ping R2's fa0/1, then you have something else wrong that is not routing.

nice343

Netstudent wrote:

If you can ping R2's fa0/1 and not R1's fa0/0, then you know it is the route on R1. IF you cannot ping R2's fa0/1, then you have something else wrong that is not routing.

I can ping R2 f0/1 and f0/0 from the switch

I cannot ping R1 f0/0 from the switch

Netstudent

One thing I will add, is that what you are trying to do should be done with static routes. You have a default route on R1 pointing toward the inside of the network. Usually default routes should point outside the network. R2 should have a default route pouinting to R1 and R1 should have a static route pointing to R2. Deconfigure the default route on R1 and use a static route like this

ip route 192.168.1.0 255.255.255.0 192.168.2.3

nice343

I already know I can accomplish connectivity using default routes on both routers but I was actually experimenting something.


Thanks for your help anyway.