1. Home
  2. Cisco Systems
  3. Help with simple point-to-point setup, pls

Help with simple point-to-point setup, pls

Hello,

I'm trying to set up a point to point connection over T-1 with the goal that computers at the main office can access computers at the remote office and vice versa. Also, computers at the remote office will access the internet through the gateway of 192.168.12.1 at the main office. On each side of the point-to-point circuit are Cisco routers with default HDLC settings.

So far, from either network, I am able to ping to the far side of the router on the other side but nowhere past that.

For example, from 192.168.15.20, I can reach 192.168.12.2 but not

192.168.12.1 (a sonicwall connected to the ISP's router).

Do you have any pointers for me? Following are the essential router config as well as the results of a "sho ip route" on each router.

! ***************************** ! ** For this router, FA 0/0 connects ! ** to the network of the main office lan. ! ** S 0/0/0 connects to a Point-to-point t-1 ! ** connection (i.e Remote-Rtr) ! ***************************** hostname Main-Rtr ! ! ! interface FastEthernet0/0 ip address 192.168.12.2 255.255.255.0 speed auto full-duplex no mop enabled ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address 192.168.13.1 255.255.255.0 ! router ospf 1 log-adjacency-changes network 192.168.0.0 0.0.255.255 area 1 ! ip classless ip route 0.0.0.0 0.0.0.0 FastEthernet0/0 ! no ip http server ! ! control-plane ! **************************** ! ** end Main-Rtr ! ****************************

======================================

**************************** **** Remote-Rtr results for "sho ip route" ****************************

C 192.168.12.0/24 is directly connected, FastEthernet0/0 C 192.168.13.0/24 is directly connected, Serial0/0/0 O 192.168.15.0/24 [110/65] via 192.168.13.2, 00:44:25, Serial0/0/0 S* 0.0.0.0/0 is directly connected, FastEthernet0/0

======================================

! ***************************** ! ** For this router, FA 0/0 connects ! ** to the network of the remote office lan. ! ** S 0/0/0 connects to a Point-to-point t-1 ! ** connection (i.e Main-Rtr) ! ***************************** hostname Remote-Rtr ! ! ! interface FastEthernet0/0 ip address 192.168.15.2 255.255.255.0 speed auto full-duplex no mop enabled ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 ip address 192.168.13.2 255.255.255.0 ! router ospf 1 log-adjacency-changes network 192.168.0.0 0.0.255.255 area 1 ! ip classless ip route 0.0.0.0 0.0.0.0 Serial0/0/0 ! ip http server ! dialer-list 1 protocol ip permit ! control-plane

! **************************** ! ** end Remote-Rtr ! ****************************

=========================

**************************** ** Remote-Rtr results for "sho ip route" ****************************

O 192.168.12.0/24 [110/65] via 192.168.13.1, 00:43:08, Serial0/0/0 C 192.168.13.0/24 is directly connected, Serial0/0/0 C 192.168.15.0/24 is directly connected, FastEthernet0/0 S* 0.0.0.0/0 is directly connected, Serial0/0/0

Reply to
Ken
Loading thread data ...

Hi, Why are you using OSPF? As I have undertood, you have two different local networks connected to two different routers, and one of them is connected to the internet. All the routing you need is the following:

  1. On the remote router: ip route 0.0.0.0 0.0.0.0 Serial0 ip classless
  2. On the main router: ip route 192.168.15.0 255.255.255.0 Serial0 ip route 0.0.0.0 0.0.0.0 FastEthernet0

This is the clear way to do it. But if just wanna get it to work, you can just do the following command on the main router: ip route 0.0.0.0 0.0.0.0 FastEthernet0 150 This way you will give the default route an Administrative Distance that is higher than the OSPF. I believe what happening with your pings is that the reply sent from the main LAN to the remote LAN are using the default route and loosing the way back to the remote router because the default route has an AD that is lower than OSPF. Please let me know how it goes.

Mohammed

formatting link

Reply to
Mohammed Alani

Cabling-Design.com Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.