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New Member

which encryption method is the best way to secure the data tranfer

Hi ,


I want to configure the Encryption between two cisco Wan routers(3845 & 3825).

We use 50MB leased line connection and transfer the data. I also configured the QOS to limit the data transfer rate to 20MB on the same pipe and it's working fine.We also use the same pipe for trading purpose too. That's why I limit 20MB for data(copy) transfer between two hosts.

Which encryption method should I use to secure the data transfer?

Plese kinldy advise .




Hello You can implement GRE



You can implement GRE/IPSEC tunneling between the two routers to fullfil your requirement




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New Member

Hi Joseph, Thanks for your

Hi Paul,


Thanks for your info and prompt reply.



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I would recommend AES256.


I would also recommend a VTI tunnel vs. GRE/IPSec.  However, both, depending on your IOS, should support AES256.


Encryption will demand more from your routers.  I think the 3845 should be able to support 20 Mbps encrypted, not as sure about the 3825.  (BTW, if you have 50 Mbps LL, why are you limited transfer rate to 20 Mbps?)


Also BTW, there's much involved in setting up encrypted tunnels for optimal performance.  Also see:

New Member

Hi Joseph, Thanks for your

Hi Joseph,


Thanks for your info and prompt reply.



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