Anyone want to post on well know addresses approach, please
read the draft
draft-ohta-preconfigured-dns-00.txt
which is only 4 pages long.
In addition, please keep in mind that anycast itself does not
offer robustness/redundancy though load sharing can be, depending
on configuration, expected to some degree.
Reading RFC1546, in addition, may also be, though too old, helpful,
which states:
DNS resolvers would
no longer have to be configured with the IP addresses of their
servers, but rather could send a query to a well-known DNS anycast
address.
and
When an anycast server fails,
some datagrams may continue to be mistakenly routed to the server,
Note also that even the RFC made a mistake to state:
the ARP
hack, requires ARP cache timeouts for the anycast addresses be kept
small (around 1 minute), so that if an anycast server goes down,
hosts will promptly flush the ARP entry and query for other servers
supporting the anycast address.
which actually is a useless configuration to be avoided, failure to
do so affected several points of the RFC.
Masataka Ohta
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