Date: Wed, 14 Mar 2001 03:08:20 -0800 From: Julian Elischer <julian@elischer.org> To: Satyajeet Seth <sseth@sasken.com> Cc: net@freebsd.org, gbnaidu@sasken.com Subject: Re: Ping Problem Message-ID: <3AAF5124.5F201288@elischer.org> References: <Pine.GSO.4.30.0103132112480.24779-100000@suns3.sasi.com>
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Satyajeet Seth wrote:
>
> > An upgrade within the '4' family should be pretty painless.
>
> I tried using a FreeBSD4.1.1 system, but the problem is still there.
> I suppose for now, my hack on FreeBSD4.1 will serve the purpose. Am I
> correct?
>
well 4.1.1 has the autosrc command which does what you are doing with your hack.
>
> I tried putting 'options BRIDGE' in my configuration file. But now ARP
> resolution of pseudo ethernet interface returned MAC address of fxp0. So I
> reverted back.
wierd this suggests a packet somewhere is getting misdirected somewhere
>
> > >
> > > 2. #ping 10.0.36.134
> > > This does not work.
> >
> > probably the arp packets are never getting back to the right interface
> >
> > You need to do more packet tracing.
> > does the packet hit the wire?
> Yes
> > does the target respond?
> Yes
> > is there a arp packet before it?
> Yes
> > does the dest respond tothe arp?
> Yes
> > does the response appear in the arp table?
> Yes
> > does the destination in turn send an arp request before responding to
> the ping?
> No.
>
> > does the arp response
> (broadcast) get assigned to an interface?
> > does it get answered?
> > from which interface?
> > does the response hit the wire?
> The answer to above three queries is no, because destination does not in
> turn send an arp request before responding to the ping.
I guess it learns from the arp enquiry.
>
> The ICMP request packets are reaching pseudo ethernet interface. But
> it is not responding back. This happens even if an ARP entry for the
> destination is there. Could you suggest what could be the problem?
>
> >
>
> > why does the PC send to the default router? netmask problems I think
> > mask == ffffffff is probably a problem.
>
> Setting the same mask as fxp0 helps.
does this mean that your problem is solved or just helped a bit?
>
> Thanks
> Satya
--
__--_|\ Julian Elischer
/ \ julian@elischer.org
( OZ ) World tour 2000-2001
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