Having two ADSLs

[Arnau Font]

Hi,

I'm writting an application that communicates through the Internet. This
application must be all day working, and I cannot depend on a single ADSL.
If it fails, I should be able to connect using another way.

I've thought in having two ADSL, changing the PC gateway if I lose
connection through one ADSL.
If I add two gateways to the TCP/IP properties, I see that if the default
gateways fails, it automatically tries the other.

I guess this means that every time I try a connection, Windows first tries
to connect through the first one, and, after a time out, through the second
one. Am I right?
So, until the first line works propertly, all connections will have a little
delay, as they try the first gateway?

Apart from that, what happens to all connections stablished at the moment
the first gateway fails? Do they automatically connect to the other gateway?
I suppose I have to raise again the connection, don't I?

Is there anyway to know if a gateway that didn't work works again?

Thanks!
Arnau.

 

[Danny Sanders]

I would suggest looking into NLB.

See:
http://support.microsoft.com/kb/232190/en-us
http://support.microsoft.com/kb/323437/en-us

hth
DDS

 

[Phillip Windell]

NLB is for multiple servers, not multiple links or multiple nics.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

The views expressed are my own (as annoying as they are), and not those of
my employer or anyone else associated with me.
-----------------------------------------------------

 

[Phillip Windell]

It is "ugly" (links below).
Instead use the method I described in my other post.


128978 - Dead Gateway Detection in TCP/IP for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;128978

171564 - TCP/IP Dead Gateway Detection Algorithm Updated for Windows NT
http://support.microsoft.com/default.aspx?scid=kb;EN-US;171564



--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

The views expressed are my own (as annoying as they are), and not those of
my employer or anyone else associated with me.
-----------------------------------------------------

 

[Phillip Windell]

Buy a DSL Device that is capable of using two WAN links (there are only a
few that can). Bring both lines into the one device. the machines on the
LAN won't no the difference and play no "role" in making it work.


--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

The views expressed are my own (as annoying as they are), and not those of
my employer or anyone else associated with me.