Minimum set of crypto algos for ipsec implementaion

[Harshwardhan Mittal <mittal@mihy.mot.com>]

Hi All,

Can Anyone tell me what minimum set of cryptographic algorithms required to
implement standard compliance IPSec and IKE.

I mean which algorithms are mandactory to support and what are the
prescribed  key lengths.

Also what AH and ESP modes and IKE phases needs to be implemented.


Thanks in advance.

Regards,

Harsh Mittal