[124181] in North American Network Operators' Group
Re: IPv4 ANYCAST setup
daemon@ATHENA.MIT.EDU (Jeroen Massar)
Fri Mar 26 09:57:27 2010
Date: Fri, 26 Mar 2010 14:55:20 +0100
From: Jeroen Massar <jeroen@unfix.org>
To: Max Larson Henry <maxlarson.henry@mtptc.gouv.ht>
In-Reply-To: <90155a1e1003260640o30471802u884af64208873684@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enig7E5637082645F08ADABE0313
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Max Larson Henry wrote:
>=20
> > has someone experience in anycast ipv4 networks (to support DNS)?=
>=20
> "Never been done" "Dangerous" "TCP does not work" etc etc etc.
>=20
>=20
> - Yes but as for DNS, anycast is essentially used for user requests
> (UDP) not to perform zone transfer(TCP).
Also that would work, unless you have a very unstable routing table that
makes the node swap all the time.
Please also note that if a DNS answer does not fit inside a a UDP packet
(default 512, MTU with EDNS0) that the fallback is TCP mode...
John Payne wrote:
[..]
> Can't really tell if you're being serious here due to caffeine
> underrun.
As it is already almost 15:00 in Europe (and it is a friday), take a
guess ;) Also note the next line I wrote and the point to the google,
which you now have done for the person, who probably is also having a
lazy friday afternoon ;)
Greets,
Jeroen
--------------enig7E5637082645F08ADABE0313
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.12 (MingW32)
iEYEARECAAYFAkusvMsACgkQKaooUjM+fCNLlgCgrNWKEuUxnZvbvixENlwBBhic
QRMAn3kj2aGeOsdOOy2CB4xWPEc2nGip
=TmO7
-----END PGP SIGNATURE-----
--------------enig7E5637082645F08ADABE0313--
