Avaya Configuring WAN Line Services Bedienungsanleitung Seite 72

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Configuring WAN Line Services
3-6 117021-A Rev. A
Setting the TCP Receive Window Size
By default, the router sets the TCP receive window for received asynchronous
packets to 4096 bytes.
Set the receive window to a value from 512 to 65535 bytes.
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 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.
Set the TCP KeepAlive parameter to a value from 3 to 180 seconds.
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.
Site Manager: Receive Window parameter: page A-4
Site Manager: TCP KeepAlive parameter: page A-5
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