Using 3 ISDN lines together

[yizhar]

HI.

One of our clients wants to replace a F.R. 128 line with 3 ISDN BRI lines to the ISP.
The 3 lines will need to act as a single combined 384k line.
The purpose is to increase bandwidth and lower fees.
(ADSL isn't available there, and leased lines or FR are more expensive per month).

I will probably need to install and configure that in the near future.

It is goint to be with a CISCO router with a multi BRI interface card connected to one of the serial interfaces.

I have only a little experience with routers and ISDN configurations, and no experience at all with load balancing.
I have done the ICND course and CCNA exam some time ago, but I don't work with routers day by day.

I have no specific question yet, just asking for your tips,
ans some general questions:
Is it going to work?
What models should (or shouldn't) we purchase as the dealers for that task?
Should the ISP make some preparations for that?
Should we use 3 user accounts or a single one? Does it matter?

Thanks
Yizhar Hurwitz

http://come.to/yizhar

http://teachers.sivan.co.il/yizhar

 

[wybnormal]

The short version is yes, you can do this.. you will be effectively muxing the 3 BRI circuits. I did the same with a PRI and wanting to use 4 of the channels for ISDN back up link to a remote site.

http://www.packetattack.com/1001_sub_page_6_5.html

at the bottom, I have a link to Configuring ISDN BRI to PRI using Multilink PPP to Aggregate Physical Interfaces from Cisco... this should be pretty close to what you want.

MikeS Find me at

http://www.packetattack.com

"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin

 

[JH24]

I am using a Cisco 3660 router which connects all our remote offices. Each office is connected primarely to a Serial interface on the router through a Kilostream or Wideband link.

Each office has then got ISDN Backup if the link goes down.
This works fine but what i want to do is to get the Primary link to stay up all the time and the ISDN to only come up if the primary link is down and the remote end router recieves interesting traffic from a Terminal to cut costs, and avoid the ISDN being up all night if a link does go down.

I have tried mucking about with the Schedular but this does not do what i want it to do.

Also if i use IP rules it seems i can only set it up so that it includes the Serial interface as well as the ISDN channels when i only want it to include the ISDN.

The routing is done through static routes.

Any ideas???

Thanks
James