Cisco WLAN controller 4400 and dhcp relay

[karczewski cyrill]

Hi everyone,

so, I have resolved my problem with my cisco WLAN controller 4400 and his famous dhcp relay.

In order to my cisco understand where chilli is, I had a command in the chilli crontab which is executed every minutes.

In fact, Instead of my cisco controller ask me who chilli is, Chilli ask him before who cisco is.

the command is: arping -b -c 2 -I eth1 -s 192.168.172.1(chilli) 192.168.172.2(cisco)

then, cisco controller had chilli mac adress and ip in his arp table. then, he answers chilli who he is.

When it is done, cisco transmit dhcp requests.

So, I hope that the problem will be resolve in the future chilli 1.0.14, but now we have a solution.

Cyrill KARCZEWSKI
Service Informatique
Hôpital Saint-Louis
1 Avenue Claude Vellefaux
75010 PARIS
0142499208

----- Message d'origine -----
De: wlanmac <wlan at mac.com>
Date: Lundi, Juillet 6, 2009 7:40 pm
Objet: Re: Cisco WLAN controller 4400 and dhcp relay
À: chilli at coova.org


> > There are no checks on the target address for ARP replies. The arp 
> reply 
>  > is btw not send as a broadcast, there is the WLC's ARP address 
> specified 
>  > as the destination address in the ethernet header.
>  > 
>  > I'd just checked Linux's implementation on sending ARP replies, it 
> sets 
>  > the target IP address to the original request source address. Maybe 
> it 
>  > should be fixed in cc to perform as other common ARP 
> implementations 
>  > perform.
>  
>  Easy enough... care to create a patch?! :)  If not, I'll try to get it
>  in there before releasing 1.0.14. 
>  
>  David
>  
>  
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