Date: Tue, 06 Oct 1998 22:29:23 +0100 From: Manar Hussain <manar@ivision.co.uk> To: freebsd-isp@FreeBSD.ORG Subject: Re: IP Load balancing Message-ID: <3.0.5.32.19981006222923.009d2330@stingray.ivision.co.uk>
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The really cute way to do this is with a layer 4 switch ... something like an alteon @10k odd + so it needs to be a serious solution requirement. The switch itself has the ip address that is publically accessed and behind it sits a network with it's on set of ip addresses etc. The switch farms out the traffic as required in a pretty clever way, including tracking sessions, having load balancing ruels, making sure the servers are up with both pings and response checks on port 80 blah blah. Something a few people do that's also useful is to have the site set-up/configured on two servers but only running on one with requests coming in on a virtual interface. If this server goes down you have systems in place to bring that ip address up on your back up server and things start to work again with very little down time. Variations are possible of course ... At 14:22 06/10/98 GMT, Steven Fletcher wrote: >I've recently encountered a product on WinNT, named Convoy and I am >wondering if there is anything at all like this for FreeBSD... I'll >explain. > >It basically is a way of 2 machines and 2/4 network cards sharing one >IP address. They talk to each other (via MAC I belive) and also talk >to the router which they are connected to via the network, answering >ARP requests in a kind of you-me order. > >If one server crashes then the other one takes over regardless. > >Now; FreeBSD has never - in over a year now of using it crashed for me >:).... but as a service to our customers we do boast high levels of >redundancy - You get the picture.... so basically is there any kind of >sharing system like this for FreeBSD ? Round-Robin DNS is not the >answer - if we take one server offline then every 2nd user gets a duff >connection. > >Any suggestions most appreciated... thanks. > >Steven Fletcher >steven@shellnet.com > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-isp" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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