domain
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... tunnel setup, and for them to communicate with native IPv6 domains
via relay routers. Effectively it treats the wide area IPv4 network ...
... wide area network which has no native IPv6
support, to communicate with other such IPv6 domains or hosts with
minimal manual configuration ...
... router acting as a relay between the 6to4
domain and a given native IPv6 domain. There is nothing special
about it; it is simply a normal router ...
... 6to4
domain and a given native IPv6 domain. There is nothing special
about it; it is simply a normal router which happens to have at least
...
... 6to4 site;
2. an exterior IPv6 routing domain interconnecting
a given set of 6to4 border routers ...
... IPv6 exterior routing domain. It is a matter of routing policy how
far this routing advertisement ...
... interface, but
these are independent routing domains with separate policies, even if
the same protocol, probably BGP4+, is used in both cases.
...
... Routing policy within the native IPv6 routing
domain determines the scope of that advertisement, thereby limiting
the visibility of the relay router in that domain ...
... domain determines the scope of that advertisement, thereby limiting
the visibility of the relay router in that domain.
...
... If BGP4+ is not deployed in the 6to4 exterior routing domain (option
2.1 of Section 5.2), the relay router will be configured to accept
...
... If BGP4+ is deployed in the 6to4 exterior routing domain (option 2.2
of Section 5.2), the relay router advertises IPv6 ...
... routing
prefix into the native IPv6 domain and MUST NOT advertise any native
IPv6 routing prefixes ...
... domain.
Within the 6to4 domain it will behave exactly as in the basic 6to4
scenario of Section 5.1.
...
... routing
protocol is in use in the 6to4 exterior routing domain, the site's
6to4 router will be configured with a default IPv6 ...
... prefix from relay routers into the native IPv6 domain, whose scope is
limited by routing policy. This is the only non-native IPv6 prefix ...
... It will be necessary for 6to4 routers to obtain routes to relay
routers in order to access the native IPv6 domain. In the simplest
case there will be a manually configured default IPv6 route ...
... prefix may be legitimately advertised into the
native IPv6 routing domain by a relay router, and into an IPv6 site's
...
... IPv6 site's
local IPv6 routing domain; hence there is a risk of misconfiguration
causing it to be advertised into a 6to4 exterior routing ...
... traffic once it leaves the 6to4
domain. Therefore, implementing IPv6 security is required even if
...
... Marques, P. and F. Dupont, "Use of BGP-4 Multiprotocol Extensions for IPv6 Inter-Domain Routing", RFC 2545prop, March 1999. ...
... Carpenter, B. and C. Jung, "Transmission of IPv6 over IPv4 Domains without Explicit Tunnels", RFC 2529prop, March 1999. ...