Data Compression/IPSec

[jjnetworks]

Looking to use data compression on some wan links (t1/e1) where the links have IPSec configured on them.

I'm not sure if you can compress encrypted data and even if you can the extra overhead on the routers may prove prohibited

Anyone had any experience with this?

[m.singer]

Here is a link with a good explanation of why compression of encrypted data is not effective in reducing bandwidth.

http://www.cisco.com/warp/public/cc/so/cuso/epso/sqfr/safev_wp.htm