[96505] in RedHat Linux List
Re: Router configuration.
daemon@ATHENA.MIT.EDU (Eric Fort)
Tue Oct 27 15:15:19 1998
Date: Tue, 27 Oct 1998 20:00:04 +0000 (GMT)
From: Eric Fort <efort@fortconsulting.com>
Reply-To: Eric Fort <efort@fortconsulting.com>
To: redhat-list@redhat.com
In-Reply-To: <36358A35.2BF8A6D6@mathtech-pk.com>
Resent-From: redhat-list@redhat.com
On Tue, 27 Oct 1998, waqar ali janjua wrote:
> Guyz pleez help me out!
>
> the problem is that i want to configure 5 machines as routers.
> The scenario is that we have 5 offices in a single city. Now i want to
> connect these 5 LANS together through ISDN(bri) lines. One of these
> offices will be connected to the ISP; which will be internet gateway.
Remember to do some traffic projections before settleing on isdn. if your
isdn is measured rate service ihe costs of a setup like this ca neat you
alive. you may also want to look at network topology a little in this
respect to minimize the number of links brought up in getting from point a
to b. depending on how much traffic you have and between what points it
flows you may do better with dedicated non-dialup connections that you pay
a flat rate for (t1, frame relay, dsl).
> Questions:
> 1)How can i configure linux redhat machines as routers. i.e. how will
> i define that a specific machine is on this gateway.
> 2)How can i define the routing table and where?
> e.g,
> one LAN(which is connected to isp) has ip's between 192.168.0.1
> -192.168.0.20
> second LAN has ip's between 192.168.0.21 - 192.168.0.40
> third LAN has ip's between 192.168.0.41 - 192.168.0.60
> fourth LAN has ip's between 192.168.0.61 - 192.168.0.80
> fifth LAN has ip's between 192.168.0.81 - 192.168.0.90
> So how can a machine from LAN 1 connects to a machine in LAN 4 whose
> IP is 192.168.0.65?
> How will i define in the routing table of LAN1 that machines with ip's
> 192.168.0.61 - 192.168.0.80 are on this/that gateway?
> I've read routed but i cant find any howto for configuring a machine as
> a gateway rooter.
> 3) the four LANS i.e, 2,3,4,5 will connect to LAN 1, and these have to
> be connected through modems, the gateway machine which will be connected
> to ISP will be having 10 modems (atleast) , than i have to buy and
> configure a "concentrator";;;Now the question is HOWTO configure a
> concentrator in linux(redhat 5.0) so the machine can recognize ten
> modems (interfaces)???
for the modems cyclades has some nice hardware. either cards that go into
the linux box or you may want to look at their pr3000 router for the
central hub site.
sangoma also makes some nice cards for this
there is also another outfit in canada that I can't think of the name
right now that makes plug in isa cards with linux drivers. the advantage
with their cards is they look like a network card to the kernel rather
than a modem. remember that many serial ports will only do 115k
rather than 128 k so as to be a bottleneck with isdn. be shure to check
the total agrigate throughput of any solution you consilder as well.
Eric
> So pleeeeez help me out!!!!!
> Thanks,
> Waqar.
>
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