Date: Sun, 18 Mar 2001 22:14:48 -0800 From: Justin C.Walker <justin@mac.com> To: net@freebsd.org Subject: Re: strange arp packets!!! Message-ID: <20010319061026.KBMK29860.femail1.sdc1.sfba.home.com@lilith> In-Reply-To: <Pine.LNX.4.10.10103191001060.1055-100000@pcs113.sasi.com>
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On Sunday, March 18, 2001, at 08:42 PM, Mohana Krishna Penumetcha wrote: > > On Fri, 16 Mar 2001, Jeroen Ruigrok/Asmodai wrote: > >> -On [20010316 06:25], Mohana Krishna Penumetcha (pmk@sasi.com) wrote: >>> 16:41:25.623476 arp who-has 0.0.0.0 tell 10.0.36.130 >>> 16:41:30.639372 arp who-has 0.0.0.0 tell 10.0.36.130 >>> 16:41:40.649838 arp who-has 0.0.0.0 tell 10.0.36.130 >>> 16:41:45.631430 arp who-has 0.0.0.0 tell 10.0.36.130 >>> 16:41:50.640533 arp who-has 0.0.0.0 tell 10.0.36.130 >>> 16:42:00.651104 arp who-has 0.0.0.0 tell 10.0.36.130(--> pcs130) >>> >>> i am little confused what this means, since 0.0.0.0 means "this host"? >> >> Not necessarily, 0.0.0.0 can also mean default gateway, which is the >> more common use nowadays. 0.0.0.0 for `this host' is an old use IIRC. >> > > i should check the code to see under what conditions the 0.0.0.0 is > used. > >>> or is it that, it is meant to update the arp entry corresponding to >>> pcs130 on other hosts in the subnet? in this case, it can as well say >>> "10.0.36.130" instead of "0.0.0.0". >> >> I am not sure right now, might be because my head's a little foggy. >> >> What does arp -a and netstat -rn look like on the FreeBSD box and on >> the >> Linux box? > > i didn't capture all that data, but i think, it is not very difficult > to > reproduce the same dump, i will check out for what ip addr, these > packets > are generated. The "default route" usage is internal-only; I think the only time that this address can trigger anything in the arp code is - assigning that address to an interface (which may inadvertently occur on something like "ifconfig IF up"). - sending or receiving a packet with that address in the IP header, which should only occur for BOOTP/DHCP client startup. Regards, Justin Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | Director of Technology | If you're not confused, Nexsi Corp. | You're not paying attention 1959 Concourse Drive | San Jose, CA 95131 | *-------------------------------------*-------------------------------* To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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