LAN Connection drops when I use Connect via dialup

Hiya Guys,

I use an snmp monitoring tool to monitor our LAN network.
When there is a device error on our LAN an error is sent via dialup connection to the internet.

I have notice that the LAN Connection drops on the monitoring PC as soon as the dialup connection for sending email is connected ?

Any ideas how to stop the LAN from disconnecting..
I thought this might be something to do with connection metric but I set the dialup priority to a high number ( low priority )
LAN still disconnects as soon as dialup makes a connection.

I want LAN to stay active while dialup active.

any help please.

Ray..

Hiya Rich, the customer we are doing the monitoring for does not want us sending email over the LAN. We have to use dialup.. I would prefer LAN myself but it's out of my control...
any other ides ? I think its a metrics issue via route print. maybe if add a statuc route ?

Hiya Guys,
I made some progress.
In windows 7 if untick the option "use default gateway on remote network" then The LAN no longer drops when dialup connection is made. However dialup connection then still fails to send email.
If I tick this option again then dialup email does send correctly but LAN Drops

The option can be found
in windows 7 goto your dialup setting properites -> networking -> select TCP/IP settings (IPv4) -> click properties-> in general tab, goto advanced tcp/ip settings

any more help?

Hiya Rich,
sendmail is set to send over dialup..
as soon as I tick the option back again on "use default gateway on remote network".
Then send mail works , without me having made any changes to send mail itself.

The section I am in, in windows 7 goto your dialup setting properites -> networking -> select TCP/IP settings (IPv4) -> click properties-> in general tab, goto advanced tcp/ip settings
this describes "this section only applies when you are connected to a local network and a dialup network simultaneously"
So It's somewhere here the should sort my issue ?

any other ideas ?
Ray..

Finally got it sorted.
For anyone interested. creating a static route on the LAN prevented the LAN from disconnecting when Dialup connected.
“use default gateway on remote network” set to default (ticked)
the command to run is
route -p add 10.0.0.0 255.0.0.0 x.x.x.x metric 2
where
10.0.0.0 is the destination LAN
255.0.0.0 subnet mask
x.x.x.x Gateway of the LAN
in windows7 the command window needs to be run as administrator.
ie:start\run and type command but don't press enter
Right click on the Command prompt icon that windows displays and "run as administrator"

Hope this helps someone else.
Ray..