[pve-devel] dhcp : lease a mask with 255.255.255.255 is not possible

[Alexandre DERUMIER]

Hi,

I have asked to my network engineer friend,

about if it's possible to allow with dhcp a mask 255.255.255.255.
(for point to point ip routing).

He said me, that it was a trick (not rfc compliant), and was working some year ago with old os. (old linux,winxp).
But not anymore with new os.(ubuntu for example or winvista/7).

I have tried to do it with ubuntu client, and indeed, the mask goes to 255.255.255.0 instead 255.255.255.255.

So for this kind of routed ip, dhcp is really not possible. 
(But defined the ip in proxmox is good to create the route to the tap interface)





I'll send a resume mail today with schemas, with differents routing possible.


I see 3 cases:

1) guest ip is is then same network than proxmox host external network (need proxy-arp)

2) guest ip routed point to point.(guest 255.255.255.255 mask) (proxmox host don't have ip in the network of the guest)


3) guest ip routed in a block range.(proxmox host have an ip in the network of guest which is gateway for guest)



Alexandre