Op 6 nov. 2013, om 15:26 heeft Mark Townsley <[email protected]> het volgende
geschreven:
>
> The derived requirements from draft-baker-rtgwg-src-dst-routing-use-cases
> (copied below) were based upon the outcome of a meeting at the last IETF in
> Berlin among the various "source plus destination routing" draft authors.
> Fred will be presenting this draft tomorrow in homenet. This functionality is
> fundamental to the operation of a multihomed homenet, so I'd like to get
> feedback (on list and during the meeting) on whether these are indeed the
> agreed upon requirements between the two groups.
>
>
> o The routing protocol or mechanism includes a source prefix. It is
> acceptable that a default source prefix of ::/0 (all addresses)
> applies to routes that don't specify a prefix.
>
> o The routing protocol or mechanism includes a destination prefix,
> which may be a default route (::/0) or any more specific prefix up
> to and including a host route (/128).
For homenets and having ingress filtering as BCP, I think ::/0 routes with ::/0
source prefixes shall not be used. Also, for homenets I do not see a use case
for non-::0 destination prefixes with non-::/0 source prefixes.
>
>
> o The FIB lookup yields the route with the most specific (e.g.
> longest-match) destination prefix that also matches the source
> prefix constraint, or no match.
I think this needs better specification. Something like:
o The FIB lookup yields the route with the most specific (e.g.
longest-match) destination prefix, and thereafter use the most
specific (e.g. longest-match) source prefix.
Or from troan-homenet-sadr:
First a longest match lookup is done in the routing table for the
destination address, then for the resulting set a longest matching
lookup is done for the source address.
This is running code with recent Linux kernel, with enabled CONFIG_IPV6.
Teco
>
>
> Thanks,
>
> - Mark
>
> On Nov 5, 2013, at 7:47 AM, Teco Boot wrote:
>
>> I’m happy to confirm recent stable Linux kernel IPv6 subtrees cache problem
>> is fixed. No need to do something special here, just give in some ip -6
>> route add default from PREFIX [ via ADDRESS ] [ dev STRING ] commands.
>> Sure we need to have a distribution mechanism having all routers know some
>> form of (source_prefix, exit_link) mapping. If we take the limitation to
>> support only default routes, a simple border router discovery and recursive
>> FIB lookup will do. Select the route to the border router, or, on the border
>> router, use the right exit link.
>> @Fred: I suggest you add my BRDP proposal in your list of efforts. No code
>> yet. It is the blueprint for MultiSmartGateway for v6 in olrsd2, to replace
>> SmartGateway tunnels which are used in current olsrd.org code.
>>
>> Teco
>>
>> Op 5 nov. 2013, om 07:19 heeft Fred Baker (fred) <[email protected]> het
>> volgende geschreven:
>>
>>> Yes, pretty much.
>>>
>>> On Nov 5, 2013, at 6:39 AM, Acee Lindem <[email protected]> wrote:
>>>
>>>> Hi Mark,
>>>> I attended and the majority of the discussion centered on whether the
>>>> problem could be solved with a simpler model such as a FIB per provider.
>>>> Fred pointed out that this would not handle overlapping source subnets and
>>>> the fact that it was possible to solve the general problem with a Patricia
>>>> tree and the installation disambiguating routes. Alvaro also commented
>>>> that there are use cases beyond homenet. As you'd expect, the next step
>>>> was that there needs to be more discussion on the RTG WG list (copied).
>>>> Thanks,
>>>> Acee
>>>>
>>>> On 11/4/13 11:05 PM, "Mark Townsley" <[email protected]> wrote:
>>>>
>>>>>
>>>>> Was anyone on this list able to attend the rtgwg meeting today where Fred
>>>>> presented draft-baker-rtgwg-src-dst-routing-use-cases-00? I missed it,
>>>>> and would be interested in the reaction, feedback, or next steps (if any).
>>>>>
>>>>> Thanks,
>>>>>
>>>>> - Mark
>>>>> _______________________________________________
>>>>> homenet mailing list
>>>>> [email protected]
>>>>> https://www.ietf.org/mailman/listinfo/homenet
>>>>
>>>
>>> ----------------------------------------------------
>>> The ignorance of how to use new knowledge stockpiles exponentially.
>>> - Marshall McLuhan
>>>
>>> _______________________________________________
>>> homenet mailing list
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>>> https://www.ietf.org/mailman/listinfo/homenet
>>
>
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