show crypto isakmp sa
Output will show peers with AM_ACTIVE.
1 IKE Peer: 173.7.14.1
Type : L2L Role : initiator
Rekey : no State : MM_ACTIVE <---------- Main Mode
2 IKE Peer: 9.1.7.47
Type : user Role : responder
Rekey : no State : AM_ACTIVE <--------- Aggressive Mode