re: [RRG] What does incremental deployment mean

[Xu Xiaohu <xuxh@huawei.com>]

> >In the above approach, IPv6 should also play the role of locator in
> site
> >networks which implies that the site network should support IPv6.
> >
> >Have most of the site networks been ready for IPv6?  Is it easy to
> upgrade
> >the routers in all the site networks to support IPv6? If the answers to
> the
> >above questions are "No", How about using IPv4(globally
> unique)+IPv4(locally
> >unique) or LD ID/AS num + IPv4(locally unique) as locator whereas using
> IPv6
> >just as identifier?
> 
> There is already a name for this; it is called ISATAP:
> 
>   http://www.ietf.org/rfc/rfc5214.txt
> 
Hi Fred,

ISATAP is indeed an interesting point. However, there is still some work to
do for ISATAP to act as a scalable Internet routing architecture. Suppose
that the whole Internet is composed of many independent IPv4 address spaces,
which are connected via ISATAP routers. The ISATAP router still needs to
route packets based on the EID (IPv6), which is not scalable since the EID
should be topology-irrelevant. Besides, in a multi-homed IPv4-enabled site
network, the dual-stack host will obtain multiple IPv6 addresses from
different ISATAP gateways, which one should be used as EID?

Best wishes,
Xiaohu XU


> fred.l.templin@boeing.com
> 
> >
> >Best wishes,
> >Xiaohu XU
> >
> >> fred.l.templin@boeing.com
> >>
> >> >
> >> >> > End of story.
> >> >> >
> >> >> > (For one, earler versions of Windows don't use/support Windows
> >> >> > Update, and a
> >> >> > lot of people have it turned off anyway, from paranoia/prudence/
> >> >> > whatever. But
> >> >> > just in general, there's a lot of old stuff out there, not just
> >> >> > Windows.)
> >> >>
> >> >> Even if everyone had Windows Update enabled, it would take
> >> >too long to
> >> >> get every system upgraded.
> >> >
> >> >Most of today's core routers have already been able to support
> >> >more than 1
> >> >million routing entries, is there enough incentive for the
> >carriers to
> >> >deploy map&encap scheme within a short period.
> >> >
> >> >Should we take a survey to reach an agreement on when the new
> >> >address and
> >> >routing scheme should be deployed?
> >> >
> >> >> The most popular network-based application is your
> >favorite browser.
> >> >> How many of them are not on the latest rev?
> >> >>
> >> >> Upgrading roughly 2 to 4 CE routers at every site on the
> >> >Internet will
> >> >> happen in far less time than changing every host.
> >> >
> >> >The approach that map implemented by hosts and encapsulation
> >> >implemented by
> >> >ITRs is incremental deployable. If hosts have not been changed
> >> >to support
> >> >this capability, the ITR can implement the map and
> >> >encapsulation together.
> >> >The upgraded hosts will not suffer the initial packet
> >> >loss/latency pain. And
> >> >the ITR with upgraded site network doesn't need a cache.
> >> >
> >> >Best wishes,
> >> >Xiaohu XU
> >> >
> >> >
> >> >
> >> >--
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> >> >archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
> >> >
> >
> >
> >
> 
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