Am Freitag 27 November 2009 16:31:57 schrieb Juliusz Chroboczek: > > If I got the README file right every node in a mesh needs to run AHCP in > > client mode and you can install any number of AHCP-servers. > > Yes. > > (Just to be pedantic: a mesh node can also be configured statically, in > which case it only needs to run ahcpd in forwarder mode.) Okay.
(If the network would have a mesh-wide multicast implementation, you could just use it and forget about the forwarders, right ?) > > Every server needs it's own IP range which cannot be shared with other > > AHCP- servers. > Yes, for IPv4 stateful configuration. > > For IPv6 stateless configuration, it is okay if all servers announce the > same prefix. IPv6 can be a lot less painful. > > Does this mean I have to reconfigure the olsr AHCP-servers to add more > > AHCP- servers to the net, because they must give away some of their IPs ? > For IPv4 stateful configuration, yes, that's the case. > > > What happens when one AHCP-server is dropping of the net ? Do every > > client of it's IP range gets a new address from another servers IP range > > ? > Yes, but only after trying really hard to contact the original server. > > Suppose a client C has been configured by server S1. A few minutes > before its lease expires, C will try to contact S1 using unicast to > renew its lease. If that fails, after a few minutes it will assume that > something bad has happened to routing, and it will try to contact S1 > using flooding. If that still fails, it will try to contact any server > using flooding. My problem with AHCP for IPv4 is that it's a little bit difficult to manage in a mesh with a "distributed" administration. Do you ever planned to add the possibility that AHCP-servers could somehow "trade" free IP space so you don't need the totally strict IP separation of servers. Or maybe to distribute the leases to other AHCP-servers so you have some redundancy ? Henning Rogge
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