Re: IPv6 tunnel problem

On 15/04/11 23:58, Marcin Cieslak wrote:
>>> Mattia Rossi<mrossi_at_swin.edu.au>  wrote:
>> I have accept_rtadv enabled if it's not a router. See my post.
>
> I think I have a similar setup (only using sixxs-aiccu). Since
> my machine is a gateway to the outside IPv6 world (via www.sixxs.net)
> I am not accepting router adverisements there, but I'm running
> rtadvd and sending them to other hosts on the LAN:
>
> 	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
>

Having ACCEPT_RTADV doesn't change anything. I can disable it by hand, 
so my options are 21<PERFORMNUD,AUTO_LINKLOCAL> as well and it doesn't work.

>> ifconfig with tunnel up is:
>>
>> ifconfig
>> bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST>  metric 0 mtu 1500
>>
>> options=8009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,LINKSTATE>
>>           ether 00:0d:9d:51:d4:7e
>>           inet 136.186.229.112 netmask 0xffffff00 broadcast xxx.xxx.xxx.xxx
>>           inet6 fe80::xxxx:xxxx:xxxx:xxxx%bge0 prefixlen 64 scopeid 0x5
>>           inet6 xxxx:xxxx:xxxx:xxxx::xxxx prefixlen 64 duplicated
>                                                          **********
>                                                       what's up here?
>>           nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
>>           media: Ethernet autoselect (1000baseT<full-duplex>)
>>           status: active
>
> Why is this address "duplicated"? If this machine *is* the gateway
> to the outside IPv6 world, should *not* it be accepting rtadv
> and have a global IPv6 address configured statically
>
There's no duplicate, maybe obfuscating the IPv6 address was not so 
smart.. There's a link local address (scopeid 0x5) starting with fe80 
installed by auto_linklocal, and the proper address set by the tunnel

>
>> tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST>  metric 0 mtu 1280
>>           options=80000<LINKSTATE>
>>           inet6 fe80::xxxx:xxxx:xxxx:xxxx%tun0 prefixlen 64 scopeid 0x9
>>           inet6 xxxx:xxxx:xxxx::xxxx -->  xxxx:xxxx:xxxx::xxxx prefixlen 128
>>           nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>                                       **********
>                                       Does "ifconfig tun0 inet6 -ifdisabled" help?
>
> I don't know why gateway6 (I don't use this software) leaves it as "IFDISABLED"
>
Haven't realized there was an ifdisabled set. But it doesn't change 
anything unsetting it. Still no IPv6

> This is /etc/rc.conf from my tunnel gateway machine (two tunnels, tun0 and
> tun1) - it runs a few-month-old -CURRENT:
>
> ipv6_gateway_enable="YES"
> rtadvd_enable="YES"
> # Internal WLAN
> rtadvd_interfaces="wlan0"
> ifconfig_wlan0_ipv6="inet6 aaaaa:bbbb:cccc::1/64"
> # Tunnel via tun0 is configured automatically by aiccu
> # and has NO /etc/rc.conf entry at all
> # Tunnel via tun1 is configured statically (it serves only some networks)
> ifconfig_tun1_ipv6="inet6 aaaaa:bbbb:cccc:8000::1"
>
> //Marcin
>
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