Re: [lwip-users] Strategy Question for DHCP

[Robert Deschambault]

Any suggestions are appreciated!  We are using straight Ethernet through a managed switch.  I can attach the record if it might help. DHCP and static IP work with no problems. But when I set the switch to disable DHCP or put it in unmanaged mode and enable autoip I see the assignment but no pings work. I notice someone else had the same problem but I wasn't able to figure out if there was a solution. I will try your suggestion to break on the switch to stop mode and see how the code got there. Could the switch be doing something?

On Jun 17, 2015 6:38 PM, "Zach Smith" <address@hidden> wrote:

That is strange. What is your physical interface - Ethernet? Wi-Fi? Are you possibly getting your own probes reflected back to you thus thinking that someone else out there already has your address – long shot.

Sorry I can’t help more. I would put a breakpoint where you see the state get set back to STOP (I think there is only a couple places):

netif->autoip->state = AUTOIP_STATE_OFF;

Then work backwards from there to see how you got there.

-Zach

 

From: lwip-users-bounces+zsmith=address@hidden [mailto:lwip-users-bounces+zsmith=address@hidden] On Behalf Of Robert Deschambault
Sent: Tuesday, June 16, 2015 7:48 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Strategy Question for DHCP

 

Hi,

 

I have been doing some additional checking using the built in debug messages from lwip during my autoip sequence.  What I have found that the autoip moves to state 1 (probing) to state 2 (announcing).  But when the IP is assigned, it goes to state 0 (stop) and never gets to state 3 (bound).  I am calling autoip_tmr() every 100 ms.  I can see the autoip_bind() call getting executed.  Any ideas?

 

Thanks,

Bob

 

-- 

Bob Deschambault

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