Date: Thu, 13 May 2004 19:57:48 +0200 (CEST) From: Olaf Hoyer <ohoyer@ohoyer.de> To: Adam Seniuk <adams@techweavers.net> Cc: freebsd-questions@freebsd.org Subject: Re: Dual Homed IP's Message-ID: <20040513195357.X4304@gaff.hhhr.ision.net> In-Reply-To: <hxmw10.sp8zl8@dev10.techweavers.net> References: <hxmw10.sp8zl8@dev10.techweavers.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 12 May 2004, Adam Seniuk wrote: > I have 2 mail servers, I would like to give those servers 2 ips so if one card > dies the other will pick it up. > > But I am having a problem since most of the configurations that i have read > up on have 2 different ip blocks. I have one large block that i can pick > from. > > Example: > em0 192.168.1.200 > em1 192.168.1.201 > Hi! For automated failover, there are kinda tricky solutions available. for manual failover, simply bind the other address as an alias on the same physical interface on one card, or use a /32 subnet mask on the second NIC. BTW: in case of mailers, you could also solve the problem with different mx records: >host yahoo.de yahoo.de has address 217.12.3.11 yahoo.de mail is handled (pri=5) by mx4.mail.yahoo.com yahoo.de mail is handled (pri=1) by mx1.mail.yahoo.com yahoo.de mail is handled (pri=1) by mx2.mail.yahoo.com So you could simply specify some fallback mailer that picks it up, no fiddling with different IP... HTH Olaf -- Olaf Hoyer ohoyer@gaff.hhhr.ision.net Fuerchterliche Erlebniss geben zu raten, ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist. (Nietzsche, Jenseits von Gut und Boese)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040513195357.X4304>