Date: Sat, 10 Jun 2000 19:48:34 +0200 From: Martin Heinen <mheinen0@wiesbaden-online.de> To: Mikhail Teterin <mi@privatelabs.com> Cc: questions@FreeBSD.ORG Subject: Re: secondary DHCP servers Message-ID: <20000610194834.B94155@Moses.earth.sol> In-Reply-To: <200006091719.NAA14802@misha.privatelabs.com>; from mi@privatelabs.com on Fri, Jun 09, 2000 at 01:19:31PM -0400 References: <200006091719.NAA14802@misha.privatelabs.com>
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On Fri, Jun 09, 2000 at 01:19:31PM -0400, Mikhail Teterin wrote: > We were recently inconvenienced by the downtime of the machine acting as > the DHCP server. So I'm wondering if it is possible to have more then > one DHCP server support the same family of clients. > > My primary concern is, of course, to ensure no server assigns to a > client an IP address that's already assigned by another server to > another client. It all depends on your setup :-). As long as multiple DHCP servers serve different IP addresses, there is no problem. The client selects one of the DHCP offers received. If the servers all serve the same range IP addresses, the clients can verify if the IP obtained from a server is already in use. They could do this with a DHCP ARP request, but I think it isn't supported widely. > But I'd also prefer to only administrate one of the servers > and have the other pick up the changes much like secondary > DNServers pick the updates from the primary. DNS and DHCP could be very involved. By that time the DHCP server allocates an IP address, it should show up in DNS. There are commercial products around handling multiple DHCP servers and DNS. OTOH you could always keep all served IP addresses in DNS. May be someone else could point to a public available product feeding DNS with current information from DHCP servers. -- use Perl; To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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