Date: Thu, 29 May 2003 11:32:23 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: "akanwar@digitarchy.com" <akanwar@digitarchy.com>, Prafulla Deuskar <pdeuskar@FreeBSD.org> Cc: freebsd-net@FreeBSD.org Subject: Re: gratuitous ARP with em interface. Message-ID: <20030529083223.GA52253@sunbay.com> In-Reply-To: <63340-22003532823577384@M2W054.mail2web.com> References: <63340-22003532823577384@M2W054.mail2web.com>
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[-- Attachment #1 --] 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, -- Ruslan Ermilov Sysadmin and DBA, ru@sunbay.com Sunbay Software AG, ru@FreeBSD.org FreeBSD committer. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+1cWXUkv4P6juNwoRAp2CAJ9/+UGvcS65PByxUOYkJYwoR8ZJMgCdG6NP 1FKPKstk7WQiWlwbRL8QjVs= =JAvd -----END PGP SIGNATURE-----
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