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Customizing Synchronous and Asynchronous Lines

4-33

Parameter: TCP KeepAlive

Default: 8 seconds

Range: 3 to 180 seconds

Function: Speciﬁes how often the local TCP sends keep-alive messages to the

remote TCP.

The router uses this parameter with the TCP Inactive Limit parameter.

When the local TCP sends out a TCP keep-alive message, it expects an

acknowledgment (ACK) from the remote TCP. The ACK then resets the

inactive limit timer.

If the local TCP does not receive the ACK from the remote TCP within

the time limit speciﬁed by the TCP Inactive Limit parameter, the TCP

connection is disabled. To prevent an error or alarm condition, set the

TCP Inactive Limit parameter to a value that allows enough time for

multiple TCP keep-alive messages.

Instructions: Specify a positive value in the range 3 to 180 seconds.

MIB Object ID: 1.3.6.1.4.1.18.3.4.3.1.35

Parameter: TCP Inactive Limit

Default: 300 seconds

Range: -65536 to 65535 seconds

Function: Speciﬁes the maximum inactivity timer in seconds. When the inactive

limit timer expires, the TCP connection between the router and the remote

TCP host is lost. This parameter works with the TCP KeepAlive

parameter.

To prevent a TCP connection loss, set this parameter to a value that allows

enough time for multiple TCP keep-alive messages and ACKs from the

remote TCP host. Refer to the TCP KeepAlive parameter for information.

If the port is listening (TCP KeepAlive) for an incoming connection, you

can specify a negative value for this parameter to mark the connection as

inactive and defer resetting the connection until a connection request is

received.

Instructions: Enter a value in the range -65536 to 65535 or accept the default value

(300).

MIB Object ID: 1.3.6.1.4.1.18.3.4.3.1.36

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Avaya Configuring Line Services Manual de usuario Pagina 133