Re: 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
k...@denninger.net <mailto:k...@denninger.net>
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