Hi Mark,
On 2010-08-03 15:13, Mark Andrews wrote:
> In message <4c573194.5040...@gmail.com>, Brian E Carpenter writes:
>> On 2010-08-03 01:52, Etienne Gallet de Santerre wrote:
>>> Hi Brian,
>>>
>>> I am a PhD student working on home networking, and especially on
>>> multihoming.
>>>
>>> I agree Ole and think that multihoming will be no longer the privilege
>>> of industries, but will be available to home networks too.
>>>
>>> As a home network is not be managed by an administrator in most cases,
>>> the solutions have to be simple and automatic.
>>> So, these networks will have to deal with PA prefixes, renumbering,
>>> internal routing and so on.
>>> Finally, if home networks have solutions to deal with it, why industries
>>> can't do the same?
>> Etienne,
>>
>> I believe, and hope, that we can devise solutions that work more or less
>> transparently for off-the-shelf home deployment, and maybe even for
>> small offices. (That's assuming I believe that SOHO users will have
>> multiple ISPs; I have my doubts about that, but never mind.) The
>> reason is that SOHO users in general absolutely don't care what their
>> address is; they may renumber every time they reboot, so why would they
>> care if they have two addresses? So yes, as Ole says, this is solvable.
>
> We can't use the IPv4 experience as a guide here. 99.9% of home
> networks are behind a NAT so they have stable internal addressing
> even when the external address changes on every reboot of the NAT.
> We need to ensure that there is stable internal addressing (ULA
> helps here). Addresses used to reach external servers however can
> change without much worry.
Yes, I agree, as long as ULAs become common practice for internal
traffic. My point exactly.
Brian
>
>> The problem for larger corporate networks, especially multi-office
>> companies, is *much* harder. They don't add or change IP prefixes
>> easily. Please see RFC 5887. Almost all of it applies to the multi-prefix
>> case as well as to simple renumbering.
>>
>> Brian
>
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