multiple isp routing and lan access

i hope i can explain this correctly. my setup will be as follows

2 isp's (1 cable, 1 business dsl
2 linksys router
3 servers (1, domain controller, 1 dedicated web server and the other for sql server and exchange) (all 2000 server
5 workstations (all xp

what i need setup is the web and exchange servers using the dsl line only and the domain controller and 5 workstations using the cable modem only but i need all 8 machines on the local lan. i'm not sure how to reconfigure my network up to accomplish this. any help will be greatly appreciated

thanks
tony

Since a network that small is probably only using one subnet (no Router
within the LAN itself), you simply control which line they use by which
Default Gateway you give them. Give the Web Server and Exchange Server the
Default Gateway pointing to the routing device on the DSL line , while
giving all others the Default Gateway of the routing device on the Cable
link.

They are all "on the LAN",...none of this changes that or has anything to do
with it.

Now if there are multiple subnets in the LAN with LAN Router(s) dealing with
those, then things get complicated and will require considerable thought and
planning. Typically in that case you would have to make sure that the Web
Server and Exchange Server are in the same subnet as the DSL line and would
be configured the same as above by using the DSL routing device as their
DFG, but then use Static Routes for the other subnets in the LAN. All others
would use the same Default Gateway of the LAN Router as they would already
be doing, but then the LAN Routing Scheme (the LAN Router(s)) would default
all "unkown routes" to the Cable link.

--

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


"Tony" <(E-Mail Removed)> wrote in message
newsF4F4F5A-3341-4112-A877-(E-Mail Removed)...
> i hope i can explain this correctly. my setup will be as follows:
>
> 2 isp's (1 cable, 1 business dsl)
> 2 linksys routers
> 3 servers (1, domain controller, 1 dedicated web server and the other for
sql server and exchange) (all 2000 server)
> 5 workstations (all xp)
>
> what i need setup is the web and exchange servers using the dsl line only
and the domain controller and 5 workstations using the cable modem only but
i need all 8 machines on the local lan. i'm not sure how to reconfigure my
network up to accomplish this. any help will be greatly appreciated.
>
> thanks,
> tony

currently all these computers are on one subnet with one router. the problem is the bandwidth being used by the workstations is killing the websites performance which is the reason for a dedicated dsl line just for the servers. i follow you with the gateway routing but how do the pc's on the cable router see the 2 servers on the dsl router? sorry for the dumb questions, i'm a programmer not a network guy. i just know enough to be dangerous

If the machines are all on the same segment and using the same IP subnet,
they do not use the routers to talk to each other. Communication between
machines on the same segment uses hardware (MAC ) addresses and send
directly over the Ethernet (also called "on the wire").

Router are only required when a machine needs to reach a "foreign"
address (ie not in the same subnet). If the LAN client doesn't have a route
defined for that address, it sends the traffic to its default router (ie the
address configured as its default gateway).

"Tony" <(E-Mail Removed)> wrote in message
news:ED4EA8E0-9D79-4F8B-B6AE-(E-Mail Removed)...
> currently all these computers are on one subnet with one router. the
problem is the bandwidth being used by the workstations is killing the
websites performance which is the reason for a dedicated dsl line just for
the servers. i follow you with the gateway routing but how do the pc's on
the cable router see the 2 servers on the dsl router? sorry for the dumb
questions, i'm a programmer not a network guy. i just know enough to be
dangerous

"Tony" <(E-Mail Removed)> wrote in message
news:ED4EA8E0-9D79-4F8B-B6AE-(E-Mail Removed)...
> the reason for a dedicated dsl line just for the servers. i follow you
with the gateway
> routing but how do the pc's on the cable router see the 2 servers on the
dsl router?

They go directly via the LAN. They don't use the Internet, therefore they
don't use either the DSL or Cable Router.

--

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