Date: Wed, 14 Mar 2001 17:43:04 +0530 (IST) From: Satyajeet Seth <sseth@sasken.com> To: Julian Elischer <julian@elischer.org> Cc: <net@FreeBSD.ORG>, <gbnaidu@sasken.com> Subject: Re: Ping Problem Message-ID: <Pine.GSO.4.30.0103141739500.9819-100000@suns3.sasi.com> In-Reply-To: <3AAF5124.5F201288@elischer.org>
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The problem is not solved. The pseudo ethernet interface(PEI) is responding with its MAC address. So arp resolution is taking place. But it is not responding to ICMP request packet. When I enable bridging the PEI's as well as fxp0 are responding to ARP with their MAC address leading to improper setting of MAC address at the other end. Thanks Satya On Wed, 14 Mar 2001, Julian Elischer wrote: > 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 > ---> X_.---._/ > v > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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