Asynchronous Port Enhancement; Making Asynchronous Ports Respond More Quickly - Allied Telesis AT-8600 Release Note

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Asynchronous Port Enhancement

Asynchronous Port Enhancement
This section describes the enhancement. The modified commands to
implement it are described in

Making Asynchronous Ports Respond More Quickly

When an asynchronous port is in ten mode, it bundles together the characters
that it receives within a certain time period, instead of passing them one at a
time to a higher protocol layer for processing. The time period over which
characters are bundled is set by the ten timer.
Bundling reduces the load on the CPU by spreading the character processing
overhead across several characters. If a remote terminal session is involved,
bundling also reduces the number of packets on the network by sending more
characters in each packet. However, bundling reduces terminal responsiveness.
A ten timer value of 100 milliseconds is generally a good compromise between
responsiveness and processing overhead. If you need to increase the port's
responsiveness, this enhancement enables you to reduce the length of the ten
timer. To do this, use the new tentimervalue parameter in the set asyn
command:
set asyn[=port-number] [tentimervalue=20..100] [other optional
parameters]
Unless you are logged in via the port you want to change, also specify the
asynchronous port number.
The default tentimervalue value is 100 milliseconds, which is the value it had
before this enhancement.
To display a port's value for the ten timer, use the command:
show asyn=port-number
In the output, check the new Ten timer value field. Note that the Mode field
displays Ten if the asynchronous port is a terminal server port in ten mode.
Command Changes
The following table summarises the modified commands:
Command
set asyn
show asyn
Command Reference
Change
New tentimervalue parameter
New Ten timer value field
Release Note
Updates.
Software Version 2.8.1
C613-10477-00 REV B