[Babel-users] Ahcpd update in OpenWrt (quick HOWTO)

Mitar mmitar at gmail.com
Mon May 31 21:41:43 UTC 2010


Hi!

On Mon, May 31, 2010 at 8:52 PM, Gabriel Kerneis <kerneis at pps.jussieu.fr> wrote:
> More seriously, you can have as many servers as you like, but be aware
> that:
> 1° the client will pick ONE server (the closest) and get every
>   information from it. Consequence: you cannot use one server to
>   distribute ip addresses and another one to distribute the dns and
>   ntp servers.
> 2° the client will try to stick with one server as much as possible. If
>   this server is unavailable when the lease expires, it will look for
>   another one.
> 3° as a consequence, if you want to have several servers, you should:
>   - duplicate the ipv6, dns and ntp fields on every server,
>   - split your ipv4 address range in n (where n = your number of
>     servers) and make each one distribute leases for (1/n)th of the
>     range.  This is due to the lack of synchronisation between the ahcp
>     servers (necessary to survive a network split).

OK. But what is then difference with running a dnsmasq on every node
with DHCP where every node has its own IPv4 pool for clients? dnsmasq
does not yet support IPv6 but is this then the only difference?


Mitar



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