
Configuring BayStack AN and ANH Asynchronous Services
308648-14.00 Rev 00
3-5
Setting the Idle Timer
By default, the router determines that the asynchronous interface is idle after 20
seconds of inactivity. The router disables an idle line.
You can set the idle timer from 1 to 300 seconds.
See the Idle Timer parameter on page A-4 for information.
Setting the TCP Receive Window Size
By default, the router sets the TCP receive window size for asynchronous packets
to 4096 bytes.
Set the Receive Window parameter to a value from 512 to 65535 bytes.
See the Receive Window parameter on page A-5 for information.
Setting the TCP Keepalive Message Interval
The TCP keepalive message interval specifies how often the local router sends
TCP keepalive messages to a remote router. The default interval is 8 seconds.
When the local router sends a TCP keepalive message on the asynchronous
interface, it expects an acknowledgment (ACK) from the remote router. The ACK
then resets the inactive limit timer.
If the local router does not receive an ACK from the remote router 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.
See the TCP KeepAlive parameter on page A-5 for information.
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