Multiple Gateways on 1 Lan

I am trying to configure my Lan to have multiple gateways. I have 2
ADSL lines for my business. The first line is used to host our web
site and allow our customers to FTP to our server. I want to add the
second ADSL line on the lan so that I can increase the bandwidth for
FTP use. I don't need to be able to access the internet through the
second line. I have sucessfully added the new ADSL Line with firewall
to lan, but I can't FTP to the server through it. The only way I can
get it to work is by setting the tcp/ip default gateway of the FTP/HTTP
server to the IP address of new gateway, but doing that stops the
FTP/HTTP traffic from the first line.

The additional lines are purely for FTP. I'm quite happy for all PC's
on the lan to use the first line, but I would like FTP traffic from
both lines to go the server.

I've tried dual wan routers, but I have found them to be unreliable.
Also, in the future we want to be able to add another 2 ADSL lines,
again for FTP use only.

Thanks for any help.

Mike

You can not have multiple default gateways on a Windows Server. You can
redundant routes, but that doesn't really help you either. You could setup
round robin DNS for ftp.yourcompany.com , but you would have to do some
engineering in the backend. You could also use BGP and *try* and load
balance, but that takes some serious knowledge and $$$. Honestly the best
thing to do is to get rid of ADSL and use a real pipe to the internet (ie
T-1 or multiple T-1's or fractional DS-3).

<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
>I am trying to configure my Lan to have multiple gateways. I have 2
> ADSL lines for my business. The first line is used to host our web
> site and allow our customers to FTP to our server. I want to add the
> second ADSL line on the lan so that I can increase the bandwidth for
> FTP use. I don't need to be able to access the internet through the
> second line. I have sucessfully added the new ADSL Line with firewall
> to lan, but I can't FTP to the server through it. The only way I can
> get it to work is by setting the tcp/ip default gateway of the FTP/HTTP
> server to the IP address of new gateway, but doing that stops the
> FTP/HTTP traffic from the first line.
>
> The additional lines are purely for FTP. I'm quite happy for all PC's
> on the lan to use the first line, but I would like FTP traffic from
> both lines to go the server.
>
> I've tried dual wan routers, but I have found them to be unreliable.
> Also, in the future we want to be able to add another 2 ADSL lines,
> again for FTP use only.
>
> Thanks for any help.
>
> Mike
>

I think the problem is that the server can't determine the return
route. I don't necessarily want multiple Default gateways.

I'm thinking that I just need to add some static routes from the server
back to the static IP addresses of the two ADSL lines, although not
100% sure that is the answer.

No, that won't work. Traffic going out to the Internet needs to use
default routing. How could you possibly know which IP addresses to route to
which gateway?

Two gateways will work fine if one gateway is to a specific location
like a branch office. You can route traffic for that specific set of IPs to
one gateway and let default routing handle the rest.

"Mike Brydon" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ps.com...
>I think the problem is that the server can't determine the return
> route. I don't necessarily want multiple Default gateways.
>
> I'm thinking that I just need to add some static routes from the server
> back to the static IP addresses of the two ADSL lines, although not
> 100% sure that is the answer.
>

Would it work if I had two NICs in the server, and put the second ADSL
line on a different subnet connected to the second NIC.

I would like a solution that is scalable so I can add even more ADSL
lines in the future. Like I said before, the additional lines do not
need to be used for outgoing internet traffic.

Mike

That will work ,but it is not scalable. Again, you should get rid of DSL
and get T-1(s).

"Mike Brydon" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> Would it work if I had two NICs in the server, and put the second ADSL
> line on a different subnet connected to the second NIC.
>
> I would like a solution that is scalable so I can add even more ADSL
> lines in the future. Like I said before, the additional lines do not
> need to be used for outgoing internet traffic.
>
> Mike
>

No that is not a solution either, and ADSL, SDSL, and "Cable TV" connections
are all *home user* technologies and are not "scalable".


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


"Mike Brydon" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> Would it work if I had two NICs in the server, and put the second ADSL
> line on a different subnet connected to the second NIC.
>
> I would like a solution that is scalable so I can add even more ADSL
> lines in the future. Like I said before, the additional lines do not
> need to be used for outgoing internet traffic.
>
> Mike
>