Linux and ULA support and default route

Erik Kline ek at google.com
Thu Oct 13 06:19:58 CEST 2016


If the RA included an RIO (and your kernel has RIO support built in)
then you should have also seen installed a /48 for that ULA prefix.
That would be the preferable thing for homenet purposes, IMHO.

On 13 October 2016 at 13:16, Brian E Carpenter
<brian.e.carpenter at gmail.com> wrote:
> This creates a tricky problem for homenet, I think, but I agree that my CE
> is doing what that requirement says. This also creates a truly annoying
> coding problem for me, which I won't go into here (except to gripe that Linux
> makes it very annoying indeed to discover your own global unicast address).
>
> Thanks
>    Brian
>
> On 13/10/2016 16:55, Lorenzo Colitti wrote:
>> The linux host is correctly not adding a default route because the RA
>> specifies a router lifetime of 0, likely due to RFC 7084 requirement G-4.
>>
>> On Wed, Oct 12, 2016 at 8:25 PM, Brian E Carpenter <
>> brian.e.carpenter at gmail.com> wrote:
>>
>>> I'll send you the RA packet off-list.
>>>
>>>     Brian
>>>
>>> On 13/10/2016 14:10, Brian E Carpenter wrote:
>>>> On 13/10/2016 13:47, Lorenzo Colitti wrote:
>>>>> On Wed, Oct 12, 2016 at 5:39 PM, Brian E Carpenter <
>>>>> brian.e.carpenter at gmail.com> wrote:
>>>>>
>>>>>> But what it says (before I install the correct default route) is
>>>>>>
>>>>>> fd00::/64 via fe80::be05:43ff:fe8e:ce39 dev wlp2s0  proto ra  metric
>>> 600
>>>>>> pref medium
>>>>>> fe80::/64 dev wlp2s0  proto kernel  metric 256  pref medium
>>>>>>
>>>>>> No default, as you can see.
>>>>>>
>>>>>
>>>>> Do you have a tcpdump of the RA?
>>>>
>>>> No. Any suggestions how I can catch one? Would a Wireshark capture be
>>> useful?
>>>>
>>>>     Brian
>>>>
>>>
>>


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