TCPKEEPCNT

TCPKEEPCNT is a system parameter that controls the number of keepalive probes that a TCP connection will send without receiving any acknowledgment before the connection is considered to be broken. This parameter is typically found in operating system network stack configurations. When a TCP connection is idle for a certain period, and keepalive probes are enabled, the system will periodically send small packets to the remote host. If the remote host does not respond to these probes within a defined timeout, the connection is assumed to be dead, and it will be terminated by the local system. TCPKEEPCNT, in conjunction with other related parameters like TCPKEEPINTVL and TCP_KEEPCNT, allows administrators to tune the behavior of TCP keepalive mechanisms. Increasing TCPKEEPCNT means more probes will be sent before a connection is declared dead, which can be useful in networks where transient packet loss is common, but it also means that a truly dead connection might remain in an unusable state for a longer duration. Conversely, a lower value will lead to quicker detection of broken connections, which can be beneficial in scenarios where prompt failure detection is critical.