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Community Member

IP Routing

Hello I have a scenerio wherein

Lan--Cisco801-ISDN WAN--Cisco801--Hub-Cisco2503 Router--Leased Circuit WAN--Corporate Network

I have the above scenerio and I want to access the corporate network from a host on the LAN side of the network, How do I enable routing so that whatever traffic coming over ISDN Network should be traversed to the corporate Network. Cisco 803 and Cisco 2503 routers are connected through the HUB. How do I enable routing on them to pass the traffic coming from ISDN to Corporate Network.

3 REPLIES
Community Member

Re: IP Routing

I hope you're not using a HUB in this day and age for any reason... Get a switch!

Besides that does this describe your setup?

LAN---Cisco 801------Cisco 801---Hub---Cisco 2503------WAN

If this is the case you need to provide a lot more information like what subnet the LAN has, and what sort of WAN you're using. You could easily route all of the traffic to the WAN, but every device on the WAN needs to know the route back to the LAN via some method.

Lets say that offices LAN is:

192.168.1.0 255.255.255.0

And your WAN has 3 sites on it with these IP ranges:

192.168.2.0 255.255.255.0

192.168.3.0 255.255.255.0

192.168.4.0 255.255.255.0

Then you would need to configure the first 801 like this:

ip route 0.0.0.0 0.0.0.0 serial 0/0 (Whatever ISDN interface is)

Then configure the second 801 like this:

ip route 0.0.0.0 0.0.0.0 serial 0/0 (Same as above)

Then the 2503 router like this:

ip route 192.168.1.0 255.255.255.0 (ip of second 801)

ip route 192.168.2.0 255.255.255.0 (ip of WAN router)

ip route 192.168.3.0 255.255.255.0 (ip of WAN router)

ip route 192.168.4.0 255.255.255.0 (ip of WAN router)

The WAN router of course would need to know that the 2503 has the 192.168.1.0 255.255.255.0 network connected to it, just like the 2503 has routes pointing to the WAN router for the 3 other sites.

Community Member

Re: IP Routing

Thanks for your reply........

Please find below the details of my setup:

LAN---Cisco 801------Cisco 801---Hub---Cisco 2503------WAN

LAN Side Cisco 801 E0:200.3.1.150 ( Network 200.3.1.0 )

LAN Side Cisco 801 BRI0-200.6.1.1 ( Network 200.6.1.0 )

Hub Side Network ( Network 200.1.1.0 )

Hub Side Cisco 801 E0 200.1.1.153

Cisco 2503 E0: 200.1.1.152

Cisco 2503 S0 : 172.16.40.34

WAN Side Network : 10.152.246.42

I have built the following static routes on the following routers as well but nothing seems to be working

Cisco 2503 Routers IP Routes:

ip route 0.0.0.0 0.0.0.0 Serial0

ip route 10.152.0.0 255.255.255.255 172.16.40.33

ip route 200.3.1.0 255.255.255.0 200.1.1.153

ip route 200.6.1.0 255.255.255.0 200.1.1.153

Hub Side Cisco 801 Router IP Routes are:

ip route 10.152.0.0 255.255.0.0 200.1.1.152

ip route 172.16.40.0 255.255.255.248 200.1.1.152

ip route 200.3.1.0 255.255.255.0 Dialer1

Lan Side Cisco 801 Router IP Routes are:

0.0.0.0 0.0.0.0 dialer1

Thomas.

Community Member

Re: IP Routing

hi;

as per ur config if its not typo mistake the on rtr 2503 the route should be :

ip route 10.152.0.0 255.255.0.0 172.16.40.33

on hub side rtr 801 :

ip route 172.16.40.0 255.255.255.0 200.1.1.152

rest is fine....try this and let us kno....

//nil

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