I have 2 separate links going to the same site. Each link has its own router from the local Telecom hanging off each circuit. Can I use a 2821 to load balance over these 2 links with the telecom routers attached?
do you mean there are 2 telecom routers going to a remote site, and you want a 2821 router to load balance to each telecom routers in order to reach remote site?
You should use BGP for that, so you will need an IOS with a Feature Set that supports it.
Also, Cisco 2821 can handle about 80Mbps of traffic (CEF-switched). If the trafic on your network is higher than that, you need a higher-end router.
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