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WAAS over VPN vs. Riverbed over dedicated T1

I have a customer doing a try-and-buy with two WAEs (612 at core, 512 at remote) on either end of an ASA-built VPN tunnel. The remote site's internet access is DSL @ 512Kbps. The customer is using CIFS acceleration; and while they are experiencing acceleration, the response time is not what he has experienced with another scenario:

He night-lights doing network admin and has deployed Riverbeds on dedicated T-1s; and claims to have experienced much greater acceleration for CIFS in the Riverbed environment.

Now short of the obvious 500 Kbps vs. T-1, I'm wondering whether having VPN between the WAEs (whether Riverbed or Cisco) could depreciate the acceleration being done due to encyrption, etc of IPSEC. I believe the customer is comparing apples to oranges and want to understand any more differences/ideas of WAFS over VPN.

THANKS!

Mike.

1 REPLY
Cisco Employee

Re: WAAS over VPN vs. Riverbed over dedicated T1

Have him look for fragmentation between the WAEs. It's possible he might have to lower his MSS.

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