Combining networks

Starting to plan to combine 3 networks - would appreciate any
pointers/advice re potential pitfalls :

3 x ADSL incoming (from 3 different ISPs) all with ranges of fixed IPs -

1 = Draytel 2600VGi - 2 x 16-port switch - Open BSD 3.7 - New mail and web
servers to be installed here - need to access all 3 ISP feeds

2 = D-Link DSL-G604T - Netgear Voice adapter + 4 x 16-port switch - SUSE 9.3
Professional / RedHat 9 / Fedora 4 network

3 = PTI PAE-CE84 (don't ask!) - 2 x 16-port switch - Wndows XP network


I need to link all 3 networks at the router level to be totally interactive
with access to new mail/web servers - all users need to be able to access
the web (doesn't matter which ISP circuit but some balancing may be
necessary) - the web servers are for both internal and external use.

my simple logic tells me that other than the actually hard wiring - the most
critical thing is setting up the routing/NAT tables

What am I missing ??

Sorry - it's Wednesday and my head hurts!

Thanks for any help

--
David

"David" <news-no-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
| Starting to plan to combine 3 networks - would appreciate any
| pointers/advice re potential pitfalls :
|
| 3 x ADSL incoming (from 3 different ISPs) all with ranges of fixed IPs -
|
| 1 = Draytel 2600VGi - 2 x 16-port switch - Open BSD 3.7 - New mail and web
| servers to be installed here - need to access all 3 ISP feeds
|
| 2 = D-Link DSL-G604T - Netgear Voice adapter + 4 x 16-port switch - SUSE
9.3
| Professional / RedHat 9 / Fedora 4 network
|
| 3 = PTI PAE-CE84 (don't ask!) - 2 x 16-port switch - Wndows XP network
|
|
| I need to link all 3 networks at the router level to be totally
interactive
| with access to new mail/web servers - all users need to be able to access
| the web (doesn't matter which ISP circuit but some balancing may be
| necessary) - the web servers are for both internal and external use.
|
| my simple logic tells me that other than the actually hard wiring - the
most
| critical thing is setting up the routing/NAT tables
|
| What am I missing ??
|
| Sorry - it's Wednesday and my head hurts!
|
| Thanks for any help
|
| --
| David
|
|
Are all 3 networks in the same physical location?

"Grant" <(E-Mail Removed)> wrote in message
news:431f4561$0$24647$(E-Mail Removed)...
>
> |
> |
> Are all 3 networks in the same physical location?
>
>
No probs there - all hubs/links in the same room even! - 0.5m patch leads
will connect it all .... well, more or less!

--
David

"Grant" <(E-Mail Removed)> wrote in message
news:431f4561$0$24647$(E-Mail Removed)...
>
> Are all 3 networks in the same physical location?
>

Same building - same room - even 0.5m patch cables will connect (well
almost!)

--
David

"David" <news-no-(E-Mail Removed)> wrote in message
news:(E-Mail Removed). ..
|
| "Grant" <(E-Mail Removed)> wrote in message
| news:431f4561$0$24647$(E-Mail Removed)...
| >
| > Are all 3 networks in the same physical location?
| >
|
| Same building - same room - even 0.5m patch cables will connect (well
| almost!)
|
| --
| David
|

Are you planning to link all the hubs/switches together onto one private
subnet with a choice of three gateways? All you need to worry about, if this
is the case, is setting up routing tables with any static routes to the
outside world that need to use particular gateways. The other thing to set
up then is any port forwarding from the outside in. Make sure that any
servers accepting incoming traffic use the same gateway to reply.

Grant

"Grant" <(E-Mail Removed)> wrote in message
news:431fdf62$0$525$(E-Mail Removed)...
>
> "David" <news-no-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed). ..
> |
> | "Grant" <(E-Mail Removed)> wrote in message
> | news:431f4561$0$24647$(E-Mail Removed)...
> | >
> | > Are all 3 networks in the same physical location?
> | >
> |
> | Same building - same room - even 0.5m patch cables will connect (well
> | almost!)
>
> Are you planning to link all the hubs/switches together onto one private
> subnet with a choice of three gateways?

That's the general idea

> All you need to worry about, if this
> is the case, is setting up routing tables with any static routes to the
> outside world that need to use particular gateways. The other thing to set
> up then is any port forwarding from the outside in. Make sure that any
> servers accepting incoming traffic use the same gateway to reply.
>

Thanks for that

I just had a nagging feeling it all seemed too simple and I was missing
something very basic!

--
David