[OpenWrt-Devel] odhcp sending RAs to wrong interface

Karl Palsson karlp at tweak.net.au
Fri Oct 28 05:50:44 EDT 2016

"Brian J. Murrell" <brian at interlinx.bc.ca> wrote:
> I have an OpenWRT router that has been running stably for many
> many (many!) months if not years on BB (r42625).
> When I reboot it, it sends a couple of initial RAs to the
> br-lan interface but subsequently switches to sending them out
> of (one of) the WAN interfaces.
> To be clear, it is sending the RAs that should be going to
> br-lan to wan0 which is eth0.2.
> Restarting odhcpd doesn't even fix it. It continues to send the
> RAs to the WAN interface.
> Some configuration files:
> #  cat /etc/config/dhcp
> config dhcp 'wan0'
>         option interface 'wan0'
>         option ignore '1'
> config dhcp 'wan1'
>         option ignore '1'
>         option interface 'wan1'
>         option dynamicdhcp '0'

Note that odhcpd doesn't actually observe that "ignore" setting.
See http://patchwork.ozlabs.org/patch/676305/ (and maybe help
push for it to be actually merged)

Karl P
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