The roadwarrior carol sets up an IPsec tunnel connection to the gateway
moon. Both end points activate Dead Peer Detection (DPD) with a
polling interval of 10s. When the network connectivity between carol
and moon is forcefully disrupted for a duration of 100s, moon
clears the connection after a number of unsuccessful retransmits whereas carol
also takes down the connection but immediately tries to reconnect which succeeds
as soon as the connection becomes available again.