I can't figure it out, the tunnel drops every few minutes. Here is the debugging on the 515E.
ISAKMP (0): retransmitting phase 2 (10/4)... mess_id 0xfaad7abc
ISAKMP (0): retransmitting phase 2 (4/5)... mess_id 0x6b130e85
ISAKMP (0): deleting IPSEC SAs with peer at 164.113.94.1
VPN Peer: IPSEC: Peer ip:164.113.94.1/500 Decrementing Ref cnt to:2 Total VPN Peers:1
VPN Peer: IPSEC: Peer ip:164.113.94.1/500 Decrementing Ref cnt to:1 Total VPN Peers:1
ISAKMP (0): deleting SA: src 164.113.94.1, dst 164.113.95.178
ISAKMP (0): beginning Main Mode exchange
crypto_isakmp_process_block:src:164.113.94.1, dest:164.113.95.178 spt:500 dpt:500
ISAKMP: drop msg for deleted sa
crypto_isakmp_process_block:src:164.113.94.1, dest:164.113.95.178 spt:500 dpt:500
OAK_MM exchange
it deletes the SAs and then immediation starts quick mode again and reestablishes. I have the sa lifetimes identical on both ends, but I don't understand why this happens, how resilient is the mgmt tunnel if there is some latency on the network? I can provide some configurations also.