[96437] in RedHat Linux List
Re: Router configuration.
daemon@ATHENA.MIT.EDU (Godfrey Nix)
Tue Oct 27 04:55:40 1998
From: "Godfrey Nix" <g.nix@emnet.co.uk>
To: redhat-list@redhat.com
Date: Tue, 27 Oct 1998 09:44:27 +0000
Reply-to: g.nix@emnet.co.uk
In-reply-to: <36358A35.2BF8A6D6@mathtech-pk.com>
Resent-From: redhat-list@redhat.com
Hi there from England,
You can get the LANs set up, but not exactly as you write. Thats why
I am getting back to you quickly.
You need to have the networks in multiples of 2, so you cannot split
in groups of 20. Use 32 instead, and your groups will be like this -
0 to 31, 32 to 63, 64 to 95, 96 to 127 and your network mask will be
255.255.255.224
Then you could set up a series of ppp interfaces to handle the
dial-up links. Define one IP address in each group as the router and
set the ppp interfaces of the routers on each lan to have the phone
number and ip address of the other routers.
Note that you are using a 'reserved' range of IP addresses and so the
main router to the internet will need to have address
translation/masquerading to use 'real' addresses to the rest of the
internet.
As for modem handling, I guess you should look at a device like those
made by Digi (digiboards have 4, 8 or 16 serial ports on one card).
Hope this helps,
Godfrey Nix
> Date: Tue, 27 Oct 1998 13:54:14 +0500
> From: waqar ali janjua <waqar@mathtech-pk.com>
> To: redhat-list@redhat.com
> Subject: Router configuration.
> Reply-to: redhat-list@redhat.com
> 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.
> 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)???
> So pleeeeez help me out!!!!!
> Thanks,
> Waqar.
>
>
Godfrey N Nix C.Eng MBCS B.ScTech(Hons)
Network Operations Manager
East Midlands Network Ltd (emnet)
phone 0115 956 8260
visit http://www.emnet.co.uk
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