P-to-P T1: Should I Route or Bridge?
Posted on 2005-05-06
As stated in a couple of previous questions, I'm learning about Cisco routers by pulling two old routers, a 1720 and a 2610, out of storage and preparing them to be put back into service. The two routers will connect two small offices across a Point-to-point T1. The T1 will carry VoIP between IP VoIP gear, and file sharing and MAPI between XP clients and W2K3 servers. Both offices have their own DSL routers for accessing the Internet.
I've gone through the routers' configuration and have tried to learn what each line does. I see that they were setup as a bridge IRB with the offices on the same subnet.
I've also learned how to use the ConfigMaker. It sets up the the configs with a routing setup on different subnets.
I can find very little on bridge IRB. The most detailed explanation I've found is in the Cisco IOS in a Nutshell. It explains that bridging doesn't scale well and that it requires more CPU from the router. But I don't see the WAN getting anymore complex and if the routers were powerful enough before, they should be fine now...
But then, I do need to implement QOS for VoIP, which was not used previously. And the offices have their own DSL, where before they shared just one. And the ConfigMaker has done the work for me in setting up the routing...
What would be best: bridge or route?
(I've set the point value to a higher level as I'm sure that I'll be asking other related questions and that I'll spread points among those who assist in helping me.)