12-04-2005 05:18 PM - edited 03-03-2019 11:08 AM
Hello all,
I'm new to the forum and have a question about setting up a WAN using a 2507 and 2514 Cisco router.
The two routers have a serial connection between them with the 2507 generating the clockrate at 250000 (DCE). I established an IP address for serial 0 / ethernet 0 on the 2507 and serial 1 / ethernet 1 on the 2514. When I view the routing table I can see the direct connection of S0 and eth0 / S1 and eth1.
My problem is from the console of RouterA when I ping ethernet 1 ip address on RouterB I do not get a reply. The same is true from the console of RouterB I don't get a reply from ethernet 0 on RouterA. I can ping with success each serial connection.
What follows is the configuration and setup for RouterA. RouterB is configured in the same manor. Any suggestions are appreciated.
RouterA(config)#int e0
RouterA(config-if)#ip address 172.16.12.1 255.255.255.0
RouterA(config-if)# no shutdown
RouterA(config-if)#int s0
RouterA(config-if)#ip address 172.16.10.1 255.255.255.0
RouterA(config-if)#clockrate 250000
RouterA(config-if)#no shutdown
12-04-2005 05:31 PM
This is normal behavior as you don't have any kind of routing between the two routers.
The simplest thing would be to use static routes as follow:
on RouterB:
ip route 172.16.12.0 255.255.255.0 172.16.10.1
On RouterA:
ip route
With this in place, you should then be able to ping the Ethernet interface of the opposite router.
Hope this helps,
12-05-2005 04:29 PM
Thanks for the information. It solved my problem. I was following a step by step lab I aquired and it did not mention anything about statically connecting opposite serial and ethernet ports. I thought because the connections were made internal to the router that by default they would see each other and once connected from one end to the serial port I would see the adjoining ethernet port. The lab stated that I should be able to ping the ethernet ports if I followed the steps.
12-04-2005 05:55 PM
Hi Rodney,
When you have connected 2 routers via serial interface your router serial interface can see each other because they are directly connected to each other and is the reason you can ping serial interfaces.
NOW your ethernet interface and serial interface on router A cannot see ethernet interface on Router B and vice versa because ethernet interface is directly connected for same router and not for the remote router.
You can either use static route as updated by in previous post by hritter or you can simple enable some routing protocol like RIP ver 2.
Because your network is really small as per what you have described better option will be static route.
HTH
Ankur
12-05-2005 04:26 PM
Thanks for the information. It solved my problem. I was following a step by step lab I aquired and it did not mention anything about statically connecting opposite serial and ethernet ports. I thought because the connections were made internal to the router that by default they would see each other and once connected from one end to the serial port I would see the adjoining ethernet port. The lab stated that I should be able to ping the ethernet ports if I followed the steps.
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