point to point network

[booted2005]

Hi
I am going to be setting up a point to point connection between two offices. Our local internet service provider, HickoryTech is leasing us a T1 connection between the two offices. This will ensure we get the full 1.5 meg per sec connection.

our connection looks like:

office A
modem - linksys router/firewall - switch - computers

office B
switch - computers

We will be connecting a cisco 1721 series router to each switch and the T1 connection will go between the 2 routers connecting both offices. We will all share the internet connection coming in at office A, and the linksys router/firewall will be assigning ip addresses to all computers at both offices. All computers will be able to see each other as 1 big network.

Does anyone see a problem with this? Is there any special configuration I need to do to the Cisco 1721 series routers. (I am not at all familiar with them)

Please give me some advice/tips

Thanks,

Ross

 

[booted2005]

Maybe this is more difficult then I anticipated...

With the serial port connection I did manage to get into the routers. This is where things begin to get a bit complicated - I can figure out how to make my changes in here but I am not sure which settings I need to change/edit if any.

Please let me know,

Thanks for any information!

Ross

 

[jneiberger]

Which part are you stuck on? Do you need help setting up the new T1? Are you sure you have already have the right modules?

Are you using the WIC1-DSU-T1 modules or are you using external CSU/DSUs?

This is actually a pretty simple setup, we just need a bit of information.

 

[booted2005]

We are using the WIC1-DSU-T1 modules. The T1 line has been ordered but its not installed yet.

As far as configuration goes, do I just have to plug the T1 into the wic cards on both routers and just plug the 10/100 ethernet into the switches? I thought there may be some special configuration changes or settings that must be entered into the router. Will all computers on both ends be able to see each other?

Thanks

Ross

 

[jneiberger]

Unless your T1 provider will be supplying the network clock signal (probably not), you need to configure *one* side of that link for internal timing. On the interface, configure this:

service-module t1 clock source internal

Leave the other side set to defaults. That will get the link up and running. You'll still need to configure IP addressing and routing. Have you already determined your IP addressing scheme? Do you know what routing protocol you want to use? For a network this small, you could easily get away with using static routes and no routing protocol.

 

[booted2005]

I am trying to find out if the T1 provider will be providing the internal timing. I am hoping they do because I dont know how to configure the timing.

All I want to do is get the link up and running. The linksys router on the one side will be the dhcp server giving all the computers on both sides the ip addresses. My network size will be about 25 users total on both sides. Will static routes and no routing protocol still work?

 

[booted2005]

to clarify:

25 users + 25 users

50 total

 

[booted2005]

HickoryTech did call to let me know they will be providing the signaling. Will this now just be plug and play?

Thanks,

Ross

 

[jneiberger]

Hmm...interesting. I've never personally run into a point-to-point circuit where the provider is handling the clocking. Regardless, if that is really the case then your config is very simple:

interface Serial0/0 (or whatever)
no shutdown



Are you positive this is a point-to-point circuit and not a frame relay circuit or something like that?

Next, we need to figure out your IP addressing. Have you thought about your addressing scheme? Have you thought about how you want to handle routing?