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2821 Router Performance w/GLBP

Hello,

We have a 2821 router near our edge for PBR, NAT, and some ACL's.  Currently we have 30mbps going through it and the CPU graphs show its peaking at about 33%.

If we are looking at doubling our bandwidth through the router, and possibly adding some more ACL's and QOS, we would have to look at replacing the router with say a 2921 instead.

We have a different 2821 that we are removing from service, so I was wondering if I setup two routers and use GLBP can I still do all of the NAT, PBR and ACL's but effectivly cut the cpu usage in half on both?

Thanks,

Dan.

PS. I have read through this document:

http://www.cisco.com/web/partners/downloads/765/tools/quickreference/routerperformance.pdf

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