Syslog messages system Message System: Interface ipsec_tnnl <tunnel_id>, state up Explanation The IPsec tunnel interface has come up . The tunnel_id is the tunnel ID. Message Level Informational Message System: Interface ipsec_tnnl <tunnel_id>, state down <reason> Explanation The IPsec tunnel interface has gone down. The tunnel_id is the tunnel ID. The reason variable can be one of the following: clear IKE SA clear IPSEC SA IKE session down IPSEC session down tunnel source interface down tunnel no destination route Administratively brought down IPSEC card down Switchover and Failover Message Level Informational