Re: router not forwarding...

Saravanan Radhakrishnan (rsarav@ittc.ukans.edu)
Fri, 23 Apr 1999 10:49:09 -0500 (CDT)


Hi Arni:
It could be possible that you have not set the routes in the
boxes 1 and 3 for each other. The ping packets from 1 may get
to 3 but may not know the way to route it back.
Let me know if this works...

Also, I don't know why there are two entries in the table.
I have seen it myself in some cases. I would like to know
the reason too..
Best,
Sarav

On Fri, 23 Apr 1999 arni@snafu.Rutgers.EDU wrote:

> Hi,
> Here is my topology..(all m/cs are RH 5.2 with 2.2.3 )
>
> Box1 <-----> Box2 <-----> Box3
>
> Box 2 is a router..(cat /proc/sys/net/ipv4/ip_forward has value 1)..and
> the kernel is compiled as a router..
>
> The route table for box 2 is :: (slightly snipped..)
>
> Destination Gateway Genmask Iface
> 10.0.1.0 * 255.255.255.0 eth1
> 10.0.1.0 * 255.255.255.0 eth1
> 10.0.2.0 * 255.255.255.0 eth2
> 10.0.3.0 * 255.255.255.0 eth0
> 10.0.3.0 * 255.255.255.0 eth0
> 127.0.0.0 * 255.0.0.0 lo
>
> (why the duplication in route table..??)
>
> Now what happens is packets go from 1 to 2 and also from 2 to 3 but not
> from 1 to 3..why is that..This used to work before..till all of a sudden
> it
> seemed to stop working..
>
> Also from 1 and 3 I can ping all the interfaces of 2..
>
> Any suggestions..??
>
> Thanks,
> Arni
>
>
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