set lifetime kilobytes (IKE policy)
set lifetime sessions (IKE policy)
set aggressive-mode client-endpoint
crypto isakmp keepalive retry-count
crypto isakmp session-time-max
crypto isakmp initiator-sessions-max
crypto isakmp responder-sessions-max
crypto isakmp nat-traversal local-port
crypto isakmp nat-traversal remote-port
crypto isakmp first-answer-time-max