A SOA Problem

[Stephane Bortzmeyer]

On Wed, May 14, 2008 at 10:24:39AM +0800,
  ??  <desccie at gmail.com> wrote 
 a message of 84 lines which said:

> [root at redhat ~]# dig @202.96.209.5 sonystyle.com.cn
...
> sonystyle.com.cn.       1800    IN      SOA     scnns.sony.com.cn.
> root.scnns.sony.com.cn. 2008042218 60 300 172800 1800

> [root at redhat ~]# dig @202.106.196.115 sonystyle.com.cn
...
> sonystyle.com.cn.       1035    IN      SOA     ns2.sony.com.cn.
> root.sony.com.cn. 2008042218 60 300 172800 3600

> Why the SOA record are different in the above ?

They are not really different. Only the name of the master server
(MNAME, says the RFC 1035) changes. It is a common practice to use the
name of the machine on which the zone file generator ran, so it may be
different between authoritative name servers. (Remember, for many
zones, primary/secondary name servers is a concept of the past.)