Bug#458154: network-console: long time-out time during install

[Frans Pop <elendil@planet.nl>]

reassign 458154 installation-guide
retitle 458154 Document how to avoid dropped network-console connections
thanks

On Monday 07 January 2008, Colin Watson wrote:
> I agree that documenting this is the best approach.

Thanks for the info Colin.

Would the following text be OK for the installation guide (to be added as a 
note in the network-console section)?

<snip>
The <command>ssh</command> server in the installer uses a default
configuration that does not have a timeout set. This means that in
principle a connection to the system being installed should be kept
open indefinitely. However, in some cases &mdash; depending on your
local network setup &mdash; the connection may be lost after some
period of inactivity. Depending on at which point of the installation
the connection was lost, you may or may not be able to resume the
installation after reconnecting.

</para><para>

You may be able to avoid the connection being dropped by adding the option
<userinput>-o 
ServerAliveInterval=<replaceable>value</replaceable></userinput>
when starting the <command>ssh</command> connection, or by adding that
option in your <command>ssh</command> configuration. Note however that in
some cases adding this option may also <emphasis>cause</emphasis> a
connection to be dropped, so it should only be used when needed.
</snip>

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