An immediate reconnect is initiated after disconnecting the Linux Agent. In earlier versions this behaviour was different.
In V9.00 (SP6 and following) and V10 the behaviour of Linux Agents in case of a disconnect was unified. Since V9.00 SP6 and V10, all Linux Agents try an immediate reconnect, if connection to the server is lost. Then a second attempt is taken after the end of the reconnect interval.