Date: 04 May 2001 15:37:08 +0100 From: Wayne Pascoe <wayne.pascoe@realtime.co.uk> To: Edwin Groothuis <edwin@mavetju.org> Cc: , freebsd-questions@freebsd.org Subject: Re: Purpose of serial number in zone files (BIND) Message-ID: <m1k83xdvu3.fsf@zaphod.realtime.co.uk> In-Reply-To: <20010504163252.D50786@d9168.upc-d.chello.nl> References: <m1wv7xdww5.fsf@zaphod.realtime.co.uk> <20010504163252.D50786@d9168.upc-d.chello.nl>
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Edwin Groothuis <edwin@mavetju.org> writes: > In the DNS setup, you have one master server and one or more slave > servers. The slave servers try to keep as up to date as possible > with the data on the master server. They do this by requesting the > SOA record of a zone, which hold data like the Time To Live of the > data, the expire time and the serial number. If the serial of a > zone on the slave is smaller than the serial number of a zone on > the master, it means the data on the master has been changed and > that the slaves have to download the whole zone again. I understand that, as per my original statement. > >'Is it only so that secondary name servers know that a change > > has happened' I am only wondering if it has any other uses. I am planning to do away with propogating zone changes using bind's zone transfer solution, and just want to know if the serial number has any use other than this. Thanks, -- - Wayne Pascoe E-mail: wayne.pascoe@realtime.co.uk Phone : +44 (0) 20 7544 4668 Mobile: +44 (0) 788 431 1675 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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