Ok, that definately helps. From the hardware aspect though, so I do need to use 2 serial interfaces, 2 WICs, and tie them to a multiplexer, which then leads to my provider, and then I need 2 more serial interfaces, and 2 WICs, on my remote router as well? I'm really trying to get a clear idea on the hardware we need to purchase.

Howdy,

There is really no need to get a multiplexer. You can use two separate T1 lines and plug them into 2 serial interfaces on your router. For all intents and purposes, the lines are physically separate. You just combine them at the logical layer.

So the equipment you need is: 2 serial interfaces at each end.

One word of caution, though.. Multilink PPP is CPU-intensive so you need a reasonable platform to make this work. What routers are you using ?

Even if you find that the CPU on your box is taking a bit of a hit, you should still be able to use two separate T1s without Multilink PPP and then use CEF to provide load-sharing over them.

Hope that helps - pls rate the post if it does.

Paresh

I have a 2811 on one end, and a 1720 on the other end. The 1720 is a little weak, 24MB of memory.

I see. So with 2 lines, why use a multiplexer? What sort of situtaion would warrant the use of a multiplexer?

thx,

Bill

Hi Paresh

I must config a Router 2811 for a Customer in Switzerland with a VWIC-1 MFT-G.703. Have you an example of config for me? The Swiss phone provider is Swisscom attachet you recived a networkplan.

Thanks

Hi,

I'm not exactly sure which bits of config you want but here's the config you need to get the E1 up and running ...

controller e1 x/y

clock source line

linecode hdb3 ! you can use 'ami' if that's what your provider is using

channel-group 1 unframed

no shutdown

Once you do that, you will be able to configure the associated serial interface.

Hope that helps - pls rate the post if it does.

Paresh

Hello Paresh,

This my first time here, so pls forgive me if I missed something . . .

With respect to the configuration that you posted, I do have some questions:

1) If we would be linking 3 T1 circuits, what is the best choice for a router and how much memory should it have, etc. (We're thinking about a 2811 series router, 2 dual WIC cards, etc.)?

2) We only have 1 location, and 3 T1 circuits coming to us from our ISP (Verizon) which will terminate at our single router. What is the best way to setup multilink ppp? Could you provide a configuration example?

3) In your opinion, would we have to work with our ISP (Verizon) to have them setup a certain configuration on their end (as opposed to just an ordinary setup (i.e., three T1 circuits coming in, each with its own ip address and subnet mask, etc.). We already have a routable block of ip addresses that we are currently using.

Any help that you can provide would be great.

Thanks,

Alex

Hello Paresh,

This my first time here, so pls forgive me if I missed something . . .

With respect to the configuration that you posted, I do have some questions:

1) If we would be linking 3 T1 circuits, what is the best choice for a router and how much memory should it have, etc. (We're thinking about a 2811 series router, 2 dual WIC cards, etc.)?

2) We only have 1 location, and 3 T1 circuits coming to us from our ISP (Verizon) which will terminate at our single router. What is the best way to setup multilink ppp? Could you provide a configuration example?

3) In your opinion, would we have to work with our ISP (Verizon) to have them setup a certain configuration on their end (as opposed to just an ordinary setup (i.e., three T1 circuits coming in, each with its own ip address and subnet mask, etc.). We already have a routable block of ip addresses that we are currently using.

Any help that you can provide would be great.

Thanks,

Alex

What will happen if one of the T1 lines goes down?

Thanks,

My belief is that multilink ppp utilizes separate circuits' bandwidth to take advantage of the maximum speed . . . if a single circuit fails, multilink ppp should continue to utilize the remaining working circuits . . .