On Friday 09 January 2004 14:54, you wrote:
> Lorin wrote:
> >>Au unii oameni un talent in a-si complica viata, ceva de speriat!
> >
> >De ce complicat ?
>
> Scuza-ma dar mi se pare cel putin ciudat faptul ca te chinui sa
> natuiesti o retea IPv6 la o adresa IPv4. Esuez in a vedea scopul unei
> asemenea constructii.
De fapt lucrurile stau la modul urmator:
(internet ipv4)-------(router)-----(lan ipv6)
|
(internet ipv6 - gre)------|
Deci pentru accesul in retele ipv6 se merge direct fara NAT prin GRE, iar
pentru ipv4 se face translare pe router.
> NAT a aparut datorita crizei IPv4; isi pierde scopul in eventualitatea
> trecerii la adrese pe 16 octeti.
Cum am spus si intr-un mail anterior e vorba in principal de un experiment
plus ca datorita dispunerii fizice a echipamentelor facilitatile de
securitate oferite de ipv6 sunt de dorit.
>
> Sau poate tu te chinui sa realizezi interconectarea unui LAN IPv6 cu
> cele 2 retele existente acum (sa zicem; IPv6 e aproape inexistent)! Ar
> fi totusi o problema pe care nu o poti rezolva, si anume natuirea
> conexiunilor realizate dinspre Internet spre hosturile din LAN.
Normal, pentru conexiuni internet/ipv4 -> lan/ipv6 toata configuratia o sa se
comporte ca un NAT chior pe 192.168..., in schimb lan-ul o sa fie vizibil in
6bone &co...
>
> Eu zic sa mai astepti vreo 2-3 ani inainte de a te repezi sa pui LAN-uri
> IPv6.
Acu' privind articolul ala http://cr.yp.to/djbdns/ipv6mess.html si in IMHO:
1. "Suppose someone sells you a public IPv6 address. You put your computer on
that address. You find that you can't reach the CNN servers or the Google
servers or your company's web servers. How will you react?
This is an example of what's called an interoperability failure. Right now,
many---in fact, most---Internet servers can't talk to clients on public IPv6
addresses. Until this changes, using a public IPv6 address instead of a
public IPv4 address will be a disaster for clients. "
Ma indoiesc ca google o sa treaca brusc pe ipv6. Probabil o sa functioneze pe
ambele retele si o sa apara ceva de genul www.google6.com pentru ipv6 iar
pentru ipv4 www.google.com (doh:). Proiecte gen deep space 6 sau moon 6 nu
sunt chiar marunte (i.e. am citit cu ceva timp in urma us army lucreaza la un
backbone pe ipv6). Am observat ca tranzitia se face de sus in jos in general,
de la backbone-uri mari cu tunele spre lan-uri s.a. De ce sa nu fie si in
sens invers ? Cat timp clientul are asigurata conectivitate full si in retele
ipv4 nu vad de ce l-ar putea deranja un lan ipv6 care e suportat bine mersi
de multe aplicatii desktop.
2. "It gets worse. The IPv6 designers don't have a transition plan. They've
taken some helpful steps, but they typically declare success (``IPv6
support'') when the real problem---making public IPv6 addresses work just as
well as public IPv4 addresses---still hasn't been solved."
Trecerea se face treptat pana cand providerii majori o sa aiba o
infrastructura puternica ipv6 si o sa ofere o alternativa de conectare pentru
clienti. Parerea mea e ca in viitor o sa ajunga la o situatie exact inversa:
retele+aplicatii pentru ipv6 dar incompatibile ipv4, asa ca nu cred ca exista
o solutie perfecta pentru niste schimbari majore, doar ceva compromisuri (a
se citi manareli). Cam ceea ce vreau sa fac io.
3. "Wake up, folks: The ``combined v4/v6 network'' is a bad joke. Without a
coherent transition plan, IPv6 has no credibility. I'm certainly not going to
waste time implementing half-baked plans; I want to see a plan that, if
implemented and universally deployed, will produce the magic moment."
Bad joke ? Ma indoiesc ca pe 13/13/2013 la ora 13:13, cand o sa deschid
calcatorul nu o sa mearga dintr-o data pingu' clasic, doar ping6...
4. "For example, some people make quite a fuss about replacing IPv4 with IPv6
as a mechanism for computers that aren't on the Internet to talk to the local
proxies. Wake up, folks: That isn't the problem we need to solve. We can, and
do, use private 10.* IPv4 addresses to talk to proxies. The address crunch
involves public IPv4 addresses; to fix it, we need public IPv6 addresses that
can talk to all the same sites."
Se poate trece oare mai usor de la o retea cu ip-uri private v4 la o retea cu
ip-uri publice v6, decat una cu ipv6 ?
5. "As another example, some people focus on building optional connections
from the IPv4 Internet to a big new IPv6 network. (If you see discussion of
how ``IPv6-only'' computers might talk to ``IPv4-only'' computers, you're
looking at one of those plans.) Wake up, folks: Nobody will join your IPv6
network if it can't talk to Google, CNN, etc. We need practically every
computer on the Internet to talk to the IPv6 network."
Chestia asta poate fi rezolvata de configuratia care am propus-o.
>
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