Strange routing configuration problem

[Sandeep kumar Davu]

>===== Original Message From Paul Schenkeveld <fb-net at psconsult.nl> =====
>On Sun, Feb 01, 2004 at 05:20:43AM -0500, Sandeep kumar Davu wrote:
>> I have 3 machines running freebsd 4.5. I want to configure one of as a
router.
>> One machine (A) has a IP of 131.123.36.65 (dc0). This needs to be connected
to
>> another machine (B) 131.123.36.102 (ed1)through a machine (R) that has two
>> network cards 131.123.36.98(dc0) and 131.123.36.101(dc1). The netmask for
the
>> every ip is 255.255.255.192  (CANT CHANGE THIS).
>
>Given your netmask, both IP addresses of R are in the same subnet
>as machine B.
>
>The card in R which is on the same subnet as A should have an IP
>address between 131.123.36.66 and 131.123.36.94.

I cant do that The ip address to A is assigned by an administrator. Only thing
I can do is to change the address and netmask on B and the card to R that
connects to B. I did so by changing the netmask to 255.255.255.252. In doing
so I could ping R on both the interfaces but still cant ping A.

Any help is greatly appreciated.

Thanks
sandeep.
>
>> I am able to ping A to R, R to A. Firstly I could not ping B to R. I
figured
>> out that B was unable to find the lladdr or R and added a static route in
R.
>>
>> $route add 131.123.36.102 -interface dc1
>> $arp -s 131.123.36.102 _ll_addr_
>>
>> Doing so I could ping from R to B.
>>
>> Now heres the problem
>> >From B I can ping to one interface of R dc1. But I cannot get  to the
other
>> interface dc0 nor to A.
>>
>> I have configured the machine R to be  a router. gateway_enable="YES"
>> router_enable ="YES"
>>
>> Even this did not help at all. I dont know where I am doing a mistake.
>> There is something that needs to be filled in.
>> Can anyone please help me here.
>> I am stuck in this for days.
>>
>> Regards
>> sandeep
>
>Regards,
>
>Paul Schenkeveld, Consultant
>PSconsult ICT Services BV

Sandeep Kumar Davu
M.S. Computer Science
Kent State University
Kent OH 44242