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Load Balancing acrros two T1s

I have two point-to-point T1 circuits running from my campus to a remote office. On the remote sight router I have a single broadcast domain, and I run NAT on the Ethernet interface of a 3640, with two serial ports serving the T1 circuits. On campus the T1s are terminated on a 4700, that connects to my backbone. I want to load balance incoming and outgoing trafic across these two T1 circuits. How can I accomplish this?

3 REPLIES
Community Member

Re: Load Balancing acrros two T1s

Depending on the latency; if the latency is low run OSPF maxipath=2 or multilink ppp.

Community Member

Re: Load Balancing acrros two T1s

What routing protocol are you running? Some protocols load balancing up to 4 path by default. Do a trace to your remote site and you will see what I mean.

Community Member

Re: Load Balancing acrros two T1s

Also, what type of load balancing are you wanting to achieve... for 50/50 split of traffic, you can use cisco express forwarding (CEF) with per packet balancing activated on each T1 interface.

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