Date: Thu, 29 May 2003 08:31:29 -0700 From: "Sreekanth" <sreekanth@redlinenetworks.com> To: "'Petri Helenius'" <pete@he.iki.fi>, "'Ruslan Ermilov'" <ru@freebsd.org> Cc: akanwar@digitarchy.com Subject: RE: gratuitous ARP with em interface. Message-ID: <001101c325f7$607b29a0$ae28a8c0@SREELAPTOP> In-Reply-To: <3ED5F14E.8070205@he.iki.fi>
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Could be attributed to the spanning tree in the switch.I have seen it happening(especially with cisco switches).I bet you are not able to send out any packet(Not just Garp). Sreekanth > -----Original Message----- > From: owner-freebsd-net@freebsd.org > [mailto:owner-freebsd-net@freebsd.org] On Behalf Of Petri Helenius > Sent: Thursday, May 29, 2003 4:39 AM > To: Ruslan Ermilov > Cc: freebsdnic@mailbox.cps.intel.com; akanwar@digitarchy.com; > freebsd-net@freebsd.org > Subject: Re: gratuitous ARP with em interface. > > > > I haven't looked that deep into why, but em is quite slow on > coming up > compared to > fxp for example. Probably something to do with hardware > re-initialization. > > Pete > > > Ruslan Ermilov wrote: > > >On Wed, May 28, 2003 at 07:57:07PM -0400, > akanwar@digitarchy.com wrote: > > > > > >>Hi all, > >> > >>Is there a known issue with alias IPs on em interfaces not > sending out > >>gratuitous arps ? > >> > >>The situation is as follows: > >> I am running a custom redundancy daemon that migrates the > IP address > >>of a server from one interface to another in case the > active network > >>path fails. Till now I was experimenting with two fxp > interfaces and > >>everything worked perfectly. i.e. when the ip address moved over > >>(using a perl script to run ifconfig commands) it sent out > grat. arps > >>for each of its alias IPs. This allowed the router to > update its Arp > >>table and talk to the newly active interface. > >> > >>Now when I try running the code with em (gigabit Ethernet > over copper) > >>NICs, I simply do not see the gratuitous arps come out of the new > >>interface. > >> > >>I am at a loss to understand what has changed. Could it be that the > >>line DOWN -> UP time of the em interface is longer thereby > causing a > >>loss of ARPs ? Any suggestions ? > >> > >> > >> > >Yes, I can reproduce this too, no gratuitous ARP is sent. > > > > > >Cheers, > > > > > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/free>; bsd-net > To > unsubscribe, send any mail to > "freebsd-net-unsubscribe@freebsd.org" > > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.483 / Virus Database: 279 - Release Date: 5/19/2003 > >
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