ietf
[Top] [All Lists]

Re: [dnsext] RFC 3484 section 6 rule 9 causing more operational problems

2009-03-04 12:30:56
On Wed, Mar 4, 2009 at 4:17 PM, Paul Vixie <vixie(_at_)isc(_dot_)org> wrote:

dns-based load balancing is an unfortunate overloading and
should never be done.


Here I agree.


RFC 3484 is correct as it is.


Here I don't. The idea behind is good, the implementation is not.
Client would have to know BGP path to DA + DB and decide on
basis of routing protocol. Selection based on longest matching
prefix will work in only very small percent of case, all other cases
are based on pure luck.

Ondrej.


It seems that Vista implements RFC 3484 address selection, including the
requirement to sort IP addresses. This breaks a great deal of operational
dependence on DNS-based load balancing, as well as being based on an
incorrect understanding of how IP addresses are allocated.

RFC 3484 needs to be updated to delete this rule, so that the order
returned from the DNS is honoured when the client has no better knowledge
about which address is appropriate.

See
http://drplokta.livejournal.com/109267.html
http://www.ietf.org/mail-archive/web/ietf/current/msg51874.html
http://www.ietf.org/mail-archive/web/discuss/current/msg01035.html
http://www.ietf.org/mail-archive/web/dnsop/current/msg05847.html
http://lists.debian.org/debian-ctte/2007/11/msg00029.html

Tony.
--
f.anthony.n.finch  <dot(_at_)dotat(_dot_)at>  http://dotat.at/
GERMAN BIGHT HUMBER: SOUTHWEST 5 TO 7. MODERATE OR ROUGH. SQUALLY
SHOWERS.
MODERATE OR GOOD.

--
to unsubscribe send a message to 
namedroppers-request(_at_)ops(_dot_)ietf(_dot_)org with
the word 'unsubscribe' in a single line as the message text body.
archive: <http://ops.ietf.org/lists/namedroppers/>

--
to unsubscribe send a message to 
namedroppers-request(_at_)ops(_dot_)ietf(_dot_)org with
the word 'unsubscribe' in a single line as the message text body.
archive: <http://ops.ietf.org/lists/namedroppers/>




-- 
Ondrej Sury
technicky reditel/Chief Technical Officer
-----------------------------------------
CZ.NIC, z.s.p.o.  --  .cz domain registry
Americka 23,120 00 Praha 2,Czech Republic
mailto:ondrej(_dot_)sury(_at_)nic(_dot_)cz  http://nic.cz/
sip:ondrej(_dot_)sury(_at_)nic(_dot_)cz 
<sip%3Aondrej(_dot_)sury(_at_)nic(_dot_)cz> tel:+420.222745110
mob:+420.739013699     fax:+420.222745112
-----------------------------------------
_______________________________________________
Ietf mailing list
Ietf(_at_)ietf(_dot_)org
https://www.ietf.org/mailman/listinfo/ietf
<Prev in Thread] Current Thread [Next in Thread>