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From: Johann Hugo <jhugo@meraka.csir.co.za>
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Date: Tue, 18 Oct 2011 22:00:11 +0200
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Subject: IPv6 accept_rtadv + bfe0
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Hi

The only way that I can get bfe0 to enable ACCEPT_RTADV is to manually do it 
with ifconfig bfe0 inet6 accept_rtadv. Even if I add it to ifconfig_bge0 in 
rc.conf it does nothing. 

grep bfe /etc/rc.conf
ifconfig_bfe0="DHCP accept_rtadv"

ifconfig bfe0
bfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80008<VLAN_MTU,LINKSTATE>
        ether 00:1d:09:a7:41:a8
        inet6 fe80::21d:9ff:fea7:41a8%bfe0 prefixlen 64 scopeid 0x9 
        inet 146.64.80.134 netmask 0xffffff00 broadcast 146.64.80.255
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

ifconfig bfe0 inet6 accept_rtadv
ifconfig bfe0
bfe0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=80008<VLAN_MTU,LINKSTATE>
        ether 00:1d:09:a7:41:a8
        inet6 fe80::21d:9ff:fea7:41a8%bfe0 prefixlen 64 scopeid 0x9 
        inet 146.64.80.134 netmask 0xffffff00 broadcast 146.64.80.255
        inet6 2001:4200:7000:100:21d:9ff:fea7:41a8 prefixlen 64 autoconf 
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

uname -a
FreeBSD pcbsd-615 9.0-BETA3 FreeBSD 9.0-BETA3 

grep v6 /etc/rc.conf
ipv6_activate_all_interfaces="YES"

grep rtadv /etc/sysctl.conf 
net.inet6.ip6.accept_rtadv=1

Is there anything else that I need to do ?

Johann