Date: 25 Apr 1998 17:13:37 -0500 From: Dave Marquardt <marquard@zilker.net> To: freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD HA configuration / Ethernet address takeover Message-ID: <85yawtim7i.fsf@localhost.zilker.net> In-Reply-To: Mattias Pantzare's message of "Sat, 25 Apr 1998 23:15:34 %2B0200" References: <199804252115.XAA14964@zed.ludd.luth.se>
next in thread | previous in thread | raw e-mail | index | archive | help
Mattias Pantzare <pantzer@ludd.luth.se> writes: > > >As others have suggested, though, all of the services that you've > > >described already support redundant servers. > > I'm aware of that. I'd prefer failing over the ethernet address > > because it would also simplify the implementation of redundant > > servers. This is because the server processes themselves only need > > to support orderly shutdown. Designing a high availabilty mechanism > > at the application level is bound to be more problematic than failing > > over the server processes at the operating system level. > > Why do it at the eternet level and not at the IP level? Doing it at the IP > level will give the same functionality if the only protocol that you are > using is IP. All the support is already there. Just set up two IP adresses > on the server that is covering for the failing server, the normal IP and the > IP of the failing server. A lot of ARP caches will retain the original server's MAC address for some number of minutes, so being able to take over the MAC address is a very good thing. -Dave To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?85yawtim7i.fsf>