Dear Everyone, Can anyone of you tell me that, by standard for an adjacent SA bundle like [IP] [AH] [ESP] [Upper] I should use two separated SA or use one SA but specify the two ALGs (and two keys)in one SA? If I have to use one SA for AH, one SA for ESP, do AH later, do I have to tell SPD that now the outbound packet's selector value in transport is ESP? Thanks. Qu