Avaya Configuring Line Services Manual do Utilizador Página 100

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Customizing Synchronous and Asynchronous Interfaces
114078 Rev. A 5-5
Setting the TCP Keepalive Message Interval
The TCP Keepalive message interval specifies how often the local TCP sends
keepalive messages to the remote TCP. The interval is 8 seconds by default.
When the local TCP sends out a TCP keepalive message on the asynchronous
interface, 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 keepalive
messages.
You can set the TCP KeepAlive parameter to a value from 3 through 180 seconds
for this interface.
The router uses this parameter with the TCP Inactive Limit parameter.
Setting the TCP Inactive Limit
When the TCP Inactive Limit timer expires, the TCP connection between the
router and the remote TCP host is lost. By default, the TCP connection on an
asynchronous interface times out in 300 seconds.
To prevent a TCP connection loss, set this parameter to a value that allows enough
time for multiple TCP keepalive messages and ACKs from the remote TCP host.
If the interface is listening 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.
You can set the TCP Inactive Limit to a value from -65536 through 65535 seconds
for this interface.
Site Manager: TCP KeepAlive parameter: page A-17
Site Manager: TCP Inactive Limit parameter: page A-18
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