Before upgrading ASA 5520 from 8.4.6 to version 9.1(7), VPN tunnel between both FW was working fine.
Now I am having few loggs on ASA 5520 about Ipsec.
on ASA 5545-X FW,
Command : show isakmp sa
36 IKE Peer: XXX-EXT
Type : user Role : initiator
Rekey : no State : MM_WAIT_MSG2
Loggs from ASA 5520:
Feb 21 2016 04:06:01: %ASA-7-713906: IKE Receiver: Packet received on XX.XX.XX.8:500 from XX.XX.XX.8:500
Feb 21 2016 04:06:01: %ASA-7-713236: IP = XX.XX.XX.8, IKE_DECODE RECEIVED Message (msgid=0) with payloads : HDR + SA (1) + VENDOR (13) + VENDOR (13) + VENDOR (13) + VENDOR (13) + NONE (0) total length : 244
Feb 21 2016 04:06:01: %ASA-7-715047: IP = XX.XX.XX.8, processing SA payload
Feb 21 2016 04:06:01: %ASA-7-713906: IKE Proposals rejected, no responder proposals configured!
Feb 21 2016 04:06:01: %ASA-7-713906: IKE Proposals rejected, no responder proposals configured!
Feb 21 2016 04:06:01: %ASA-7-713906: IKE Proposals rejected, no responder proposals configured!
Feb 21 2016 04:06:01: %ASA-7-713236: IP = XX.XX.XX.8, IKE_DECODE SENDING Message (msgid=0) with payloads : HDR + NOTIFY (11) + NONE (0) total length : 172
Feb 21 2016 04:06:01: %ASA-7-713906: IP = XX.XX.XX.8, All SA proposals found unacceptable
Feb 21 2016 04:06:01: %ASA-3-713048: IP = XX.XX.XX.8, Error processing payload: Payload ID: 1
Feb 21 2016 04:06:01: %ASA-7-715065: IP = XX.XX.XX.8, IKE MM Responder FSM error history (struct &0x760828c8) <state>, <event>: MM_DONE, EV_ERROR-->MM_START, EV_RCV_MSG-->MM_START, EV_START_MM-->MM_START, EV_START_MM-->MM_START, EV_START_MM-->MM_START, EV_START_MM-->MM_START, EV_START_MM-->MM_START, EV_START_MM
Feb 21 2016 04:06:01: %ASA-7-713906: IP = XX.XX.XX.8, IKE SA MM:b8ca90dc terminating: flags 0x01000002, refcnt 0, tuncnt 0
Feb 21 2016 04:06:01: %ASA-7-713906: IP = XX.XX.XX.8, sending delete/delete with reason message
Feb 21 2016 04:06:04: %ASA-5-752004: Tunnel Manager dispatching a KEY_ACQUIRE message to IKEv1. Map Tag = outside_map. Map Sequence Number = 10.
Feb 21 2016 04:06:04: %ASA-7-715077: Pitcher: received a key acquire message, spi 0x0
Feb 21 2016 04:06:04: %ASA-6-713905: There is no valid IKE proposal available, check IPSec SA configuration!
Feb 21 2016 04:06:04: %ASA-4-752012: IKEv1 was unsuccessful at setting up a tunnel. Map Tag = outside_map. Map Sequence Number = 10.
Feb 21 2016 04:06:04: %ASA-3-752015: Tunnel Manager has failed to establish an L2L SA. All configured IKE versions failed to establish the tunnel. Map Tag= outside_map. Map Sequence Number = 10.
Feb 21 2016 04:06:04: %ASA-7-752002: Tunnel Manager Removed entry. Map Tag = outside_map. Map Sequence Number = 10.
You phase one policies don't match, or one sides configured for IKE1 and the other IKE2