dhcpcd-discuss

On 08/02/2013 18:01, Kobi Cohen-Arazi wrote:
> > dhcpcd should remove the old ip address fine and should do this when 
> > the interface is down, however there are some scenarios where this 
> > won't occur.
>
> Wait a sec - so I do need to ifdown + ifup the device in order for
> the secondary to be promoted and old IP address to be removed? That
> might be my issue. I'm not doing it.

Yes, this is the issue, or sounds like it. But read below before doing 
anything.

> > Basically dhcpcd will not do this if persistent address is enabled 
> > or carrier detection is disabled.
> > Can you tell me how dhcpcd is started and what your configuration 
> > file is?
>
> I should have mention this in my previous email. I'm using dhcpcd on
> Android JellyBean device. Android is using dhcpcd as DHCP client.
> dhcpcd is started with:
> dhcpcd -ABKLG -h <hostname>
>
> There is no dhcpcd.conf file on the OS filesystem.

Really? I'm suprised it works for the most part then.
I would install the default dhcpcd.conf dhcpcd ships with into /etc

>  
> Here is what I see in if-options.c:
>
>         case 'A':
>                 ifo->options &= ~DHCPCD_ARP;
>                 /* IPv4LL requires ARP */
>                 ifo->options &= ~DHCPCD_IPV4LL;
>                 break;
>         case 'B':
>                 ifo->options &= ~DHCPCD_DAEMONISE;
>                 break;
>
>         case 'K':
>                 ifo->options &= ~DHCPCD_LINK;
>                 break;
>         case 'L':
>                 ifo->options &= ~DHCPCD_IPV4LL;
>                 break;
>
>         case 'G':
>                 ifo->options &= ~DHCPCD_GATEWAY;
>                 break;

Interesting.
I would try this
dhcpcd -h <hostname>

Do you know what starts dhcpcd? If it's just started as a system daemon 
and left to itself then it should be fine.
Otherwise I would convert your 'droid to do this.

Thanks

Roy