Re: [lwip-users] DHCP: IF not connected on power up

[Bernhard 'Gustl' Bauer]

Simon Goldschmidt schrieb:
> "Bernhard \'Gustl\' Bauer" wrote:
> > Maybe I'm not patient enough. What is the longest time from
> > plugging the cable to getting an IP?
>
> Was that really what you wanted to do? DHCP increases its retry
> timeout for every retry, so when you just start DHCP and plug the
> cable after some minutes, the retry timeout will already be quite
> high and thus it might take a long time until DHCP retries to find a
> server.

Ahhh! One time I had this 'failure' LWIP had run for hours before I 
plugged in!

> Instead, you should monitor your PHY and when it detects a link, call
> dhcp_start (or dhcp_reboot?). This ensures that the time from
> plugging the cable to getting an IP address is (nearly) constant.

I will do so. Is there already a structure in LWIP to show a linked PHY 
or do you plan to add one. I'd like to be compatible.

Gustl