accept_rtadv

[Karl Denninger]

On 2/27/2021 02:20, Doug Hardie wrote:
>  From the Handbook:
>
> 32.9.2. Configuring IPv6
> To configure a FreeBSD system as an IPv6 client, add these two lines to rc.conf:
>
> ifconfig_rl0_ipv6="inet6 accept_rtadv"
> rtsold_enable="YES"
>
> This does not work.  I have in rc.conf:
>
> ifconfig_bge0_ipv6="inet6 accept_rtadv"
> ifconfig_ue0_ipv6="inet6 accept_rtadv"
> ifconfig_ue1_ipv6="inet6 accept_rtadv"
>
> On all three interfaces, ifconfig shows:
> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>
> ACCEPT_RTADV is not listed and sure enough router advertisements are ignored.  I have to manually enter:
> ifconfig bge0 ipv6 accept_rtadv
> for each interface.  Then ifconfig shows:
>
> nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
>
> and the interface now accepts router advertisements.  This is a bug, but I don't know if it's in the code or the handbook.
>
> -- Doug
>
I'm running 12.2-STABLE and have no problem with this; snippet from 
/etc/rc.conf:

#
# IPv6 on internal interface, autoconfigure
#
ifconfig_igb0_ipv6="inet6 accept_rtadv"
rtsold_enable="YES"

And it does.

.....

         (addresses and options)
         status: active
         nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>

-- 
Karl Denninger
karl at denninger.net <mailto:karl at denninger.net>
/The Market Ticker/
/[S/MIME encrypted email preferred]/
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