Oct 26 2005 c. 20:42 Graham Toal wrote:
> I wanted to set up a system which has two ether cards (it's part of
> a transparent bridge so it'll be inline with someone's connection)
> such that it'll pick up a DHCP address on *both* cards ... the
> trick comes from not knowing in advance whether the DHCP server
> will be on the inside connection or the net-facing one. (i.e. if
> the bridge is deployed near the network edge, the DHCP server is
> inside; but if it is deployed immediately in front of a single
> server, then it will see DHCP facing outwards).
>
> It *ought* to be possible to configure both hostname.xl0 and
> hostname.fxp1 as dhcp, and whichever one comes up first, will then
> bridge through the DHCP server for the other. Unfortunately it
> just happens by luck of alphabetical order, that the one which
> comes up first is *not* looking at a DHCP server. So after a
> relatively short period of retries it goes to sleep. Then the
> other interface asks for its dhcp address and gets it quickly.
> What I expected was that the first would sleep for a short time
> then ask again, and get it OK. I haven't seen that happen - about
> 30 minutes later and the interface still has no IP.
>
> What's the best way to ensure that they both get IPs as quickly as
> possible? I can think of some dirty hacks, but I don't like the
> solutions I've come up with. (For example, if I kick off the dhcp
> client requests in the background, that interferes with the rest of
> the boot sequence).
>
> Has anyone had this configuration before and come up with an
> elegant solution?
May be I'm wrong (only one OBSD box with two NICs with different
networks attached I heve this time is production box and cannot be
switched off now), but maybe this helps:
1) Disable sysctl net.inet.ip.forwarding in sysctl.conf
Then, in rc.local:
2) Initialize network manually (call dhclient)
3) Enable forwarding
4) Configure and wake up bridge
IMHO, this'll look like static IP address given to bridge
interfaces...
--
With my best,
Pereresus ne Vlezaet Buggy
