I've used "heartbeat" successfully for a few years on two-node active/passive failover setups. Gratuitous ARPs are sent out when the "standby" takes over. We've been able to get extremely quick failover, to the point where running a ping of the virtual IP while causing a failover results in missing, at most, one reply.
These are RHEL4 web servers, BTW, and they also have a back-to-back serial port link for monitoring the heartbeat. -- Jeremy L. Gaddis Network Administrator Ivy Tech Community College of Indiana 812.330.6156 (w) 812.330.6212 (f) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Stewart Sent: Friday, April 11, 2008 7:31 AM To: 'Robert Blayzor' Cc: [email protected] Subject: Re: [c-nsp] Virtual IP Question Thanks... used it before and had good success.... will suggest....:) -----Original Message----- From: Robert Blayzor [mailto:[EMAIL PROTECTED] Sent: Thursday, April 10, 2008 10:22 PM To: Paul Stewart Cc: [email protected] Subject: Re: [c-nsp] Virtual IP Question On Apr 10, 2008, at 9:42 PM, Paul Stewart wrote: > Thanks... was going to go down that route previously but the server > admin > doesn't want to do NAT and the servers are in a large subnet with > other > servers so using public IP dispatch isn't an option neither if I > understand > SLB properly...;) Looked at both modes and didn't see how either > would work > unfortunately.... If these are Linux or *BSD servers, you could look at CARP. -- Robert Blayzor, BOFH INOC, LLC [EMAIL PROTECTED] http://www.inoc.net/~rblayzor/ Mac OS X. Because making Unix user-friendly is easier than debugging Windows. -- No virus found in this incoming message. Checked by AVG. Version: 7.5.519 / Virus Database: 269.22.11/1368 - Release Date: 4/9/2008 4:20 PM _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
