Basic router config help required 500 points urgent


I am new to routers and i need to configure two routers to connect two offices together.

Details are :

If the office set up is :


router ip
ip route
serial0 ip

remote office is currently :

dfg (to allow internet access out of that site through an existing router)

what will the 'remote' router details need to be (for the new router)?

is it :

serial0 ip
router ip (this ip available on that network)
will the iproute be ???

will i need to change anything on the pc at the remote site ?

thanks for your help.
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mikebernhardtConnect With a Mentor Commented:
So you have 3 routers. I would suggest using a dynamic routing protocol like EIGRP instead of static routes. But if you want to do static routes, then do the following:
1. All routers need a static route pointing to all networks that are not directly connected. Static routes always point to the next hop. So on router 1, you need a route to router 3's LAN, and the next hop is router 2. Etc.
2. Router 3 needs a default route pointing to it's next hop to the internet, which is router 2's IP address on the leased line.
3. Router 2 needs a default route pointing to it's next hop to the internet, which is router 1's IP address on the LAN it connects to router 1 on.

Does that make sense?
In the 'remote' router, you must configure a route to the network you also need to add a route in the actual internet router, to point to the "new" 'remote" router.
This is:
'Remote' Router
ip route192.168.26.0

Internet Router
ip route

Whit this configuration you don't need to make any changhe in the remote pc

Another option is to change the default gateway in the pc to, and add a default route on 'remote' router to point to the internet router this is ip route
Whit this option, you don't need to make any changes on the internet router.

if you use more the internet on the remote office, your best option is the first

I hope that this answer be useful to you
The above is incorrect. You don't want to tell the internet router that it's local LAN is across the serial link!

Assuming that you want to use the IPs you listed,
Remote router:
ip route

Internet router:
ip route [whatever the subnet mask is]
ip route [the ISP's IP address, or the ISP-connected interface]

I don't know what subnet masks you're using for your various subnets, but the mask for your 172.19 subnet goes inside the brackets above. This will tell the internet router to direct all unknown addresses out to the internet, but the remote router's LAN is on the other side of the serial link.
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I'm assuming that the internet router is on remote office and is the gateway for the pc with address
If this is correct, the local lan for the internet router is 172.19.22.x (asumming subnetmask
DellboyAuthor Commented:

I am getting confused. Let me try and give you a clearer picture of the network.

Router 1 ( this provides the internet connectivity.

Router 2 ( this is one end of the leased line.

Router 3 ( this at the other end of the leased line.

Router 2 can ping both routers

Router 1 can only ping router 2 and nothing else.

What static route entries do i need on each of the routers listed above ?

I do need internet access through router 1.

I hope this clears the picture up.

ps i did get confused readying your respective replys, was there a mistake in one of the comments as suggested or not ?



lmunguiaConnect With a Mentor Commented:
is clear to me, that you need to add the following route in Router 1

ip route

Whit this route, you are telling the router 1, how to reach the office at the other end of the leased line

There is no need to add anything in router 2, because it allready can ping to router 3

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