Date: Sat, 25 Apr 1998 09:42:56 +0000 (GMT) From: Alfred Perlstein <perlsta@fang.cs.sunyit.edu> To: Hans Huebner <hans@artcom.de> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD HA configuration / Ethernet address takeover Message-ID: <Pine.BSF.3.95.980425093556.7767A-100000@fang.cs.sunyit.edu> In-Reply-To: <Pine.BSF.3.96.980425145610.11665A-100000@transrapid.artcom.de>
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a combination of MX records (DNS), proper NIS slave servers and DNS secondaries should take care of your problem. Afaik, the MAC level address is burnt into the card. there is also a way of using DNS to round robin IP addresses, i _think_ you can define multiple PTR records and if one IP "times out" the resolver library tries the next IP in the list of PTRs. I've only heard of this, you'd have to look into the implementation. All the services you talk about offer thier own versions of redundancy, you need to read more about the features offered by DNS and NIS and thier slave system capabilities. -Alfred On Sat, 25 Apr 1998, Hans Huebner wrote: > Hello there, > > we're running some of our critial LAN services (NIS, DNS, mail etc.) on > FreeBSD. The systems are quite stable, but from time to time we need to > take a system down for maintenance purposes. Also, hardware problems can > cause unplanned down times. > > I'm currently looking for a solution to configure a PC as a warm-standby > fallback server for the most important services (NIS and DNS). To make a > failover to the fallback server as transparent to the users as possible, > it would be best if the fallback system could take over the ethernet > address of the failed server. I've seen this work with certain > (expensive) Solaris configurations, and I'd like to do something similar > with FreeBSD. > > I tried to implement DNS failover by moving our name service IP address to > another machine, but this resulted in severe client problems (most clients > fail to renegotiate the MAC adress with ARP within finite time). > > Looking at the ifconfig manpage, I could not find a general way to set a > Ethernet card's MAC address. Is there a documented solution to this > problem? If not, would adding such functionality be problematic? > > Any pointers, hints or suggestions are greatly appreciated. I'd also be > interested in any reports on running two FreeBSD systems on one shared > SCSI bus. I suppose the disk driver would need to be changed quite a bit > to make use of the RESERVE UNIT SCSI command to prevent access collisions. > > Thanks, > Hans > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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