cisco asa vpn keep alives cli

sh run all | tunnel-group x.x.x.x ipsec-attributes
 ikev1 pre-shared-key *****
 peer-id-validate req
 no chain
 no ikev1 trust-point
 isakmp keepalive threshold 10 retry 2
 no ikev2 remote-authentication
 no ikev2 local-authentication


found in ASDM
Config -> Site-to-site VPN -> select peer -> Edit -> Advanced -> tunnel-group