Classes and failover

[Austin Gabel]

The secondary would show a "peer holds all free leases" message and the
primary should respond.


On Fri, Jun 27, 2008 at 7:13 AM, Rene Joergensen <rgj at fzr.dk> wrote:

> On Fri, Jun 27, 2008 at 12:56:01PM +0200, Leif Arne Neset wrote:
>
> > Use Wireshark or something similar to have a look at the DHCPDISCOVER
> > packets. My guess is that the field "seconds elapsed" in the packets are
> > either 0 (zero) or larger than the value in the configuration option
> > "max-response-delay". If this is true both servers are supposed to
> > answer the discoverpackets.
>
> As i read the man-page, max-response-delay is for the interconnect
> between the two servers. "load balance max seconds" seems to be the
> option you're refering to. But why would they respond to the
> DHCPDISCOVER/DHCPREQUEST if seconds elapsed is 0? Then it should be
> decided via split and/or who owns the lease. Again that is, if i
> understand it correctly.
>
> How do dhcpd respond to the following scenario?:
> Two servers have a pool with a range of only one IP. That IP is balanced
> to the primary, so the secondary holds 0 leases in that pool.
> The client then sends the request to both of them, via the split
> statement dhcpd then calculates it to be the secondary who should
> respond to the request, but the secondary holds no leases.
> Will the primary then respond or is the IP balanced on-the-fly to the
> secondary?
>
> --
> -René
>
>
>
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