[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

IPv4 ANYCAST setup

Subject: IPv4 ANYCAST setup
From: owen at delong.com (Owen DeLong)
Date: Fri, 26 Mar 2010 10:01:30 -0700
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>

On Mar 26, 2010, at 6:40 AM, Max Larson Henry wrote:

>>> has someone experience in anycast ipv4 networks (to support DNS)?
>>
>> "Never been done" "Dangerous" "TCP does not work" etc etc etc.
>>
>
> - Yes but as for DNS, anycast is essentially used for user requests  
> (UDP)
> not to perform zone transfer(TCP).
>
> -M

The number of DNS queries for user requests that are in UDP in IPv4
is nearly all.  When you start seeing hosts with more than a couple
of AAAA records, you will start seeing more user requests in TCP.

FWIW, World of Warcraft authentication actually involves some hosts
with enough A records to require TCP.

Owen

References:
- IPv4 ANYCAST setup
  - From: lutz.muehlig at internetx.de (InterNetX - Lutz Muehlig)
- IPv4 ANYCAST setup
  - From: jeroen at unfix.org (Jeroen Massar)
- IPv4 ANYCAST setup
  - From: maxlarson.henry at mtptc.gouv.ht (Max Larson Henry)

Prev by Date: IPv4 ANYCAST setup
Next by Date: IPv4 ANYCAST setup
Previous by thread: IPv4 ANYCAST setup
Next by thread: IPv4 ANYCAST setup
Index(es):
- Date
- Thread