master and slave on the same server

[Rajesh Bandar]

Hi All,
 I am running Bind 9.3.1 on two solaris 9 boxes. One is configured as master
and the other one as slave
for the domain name au.ap.company.com <http://au.ap.company.com>. My parent
zone ap.company.com <http://ap.company.com> has delegated 2 name servers
for au.ap.company.com <http://au.ap.company.com>
(NS1.AU.AP.COMPANY.COM<http://NS1.AU.AP.COMPANY.COM>&
NS2.AU.AP.COMPANY.COM <http://NS2.AU.AP.COMPANY.COM>). Below are the name
servers for au.ap.company.com <http://au.ap.company.com>:
 au.ap.company.com <http://au.ap.company.com>. IN NS
ns1.au.ap.company.com<http://ns1.au.ap.company.com>
.
au.ap.company.com <http://au.ap.company.com> IN NS
ns2.au.ap.company.com<http://ns2.au.ap.company.com>
 ns1.au.ap.company.com <http://ns1.au.ap.company.com>. IN A
172.26.70.1<http://172.26.70.1>
ns2.au.ap.company.com <http://ns2.au.ap.company.com> IN A
172.26.70.2<http://172.26.70.2>
 I have configured ns1 as master and ns2 as slave. Everythig is working fine
at the moment. Now my manager
has asked me to configure another master server for DR purpose. Basically
rsync the master server config file
and zone files to another machine. We dont have any spare machine to do
this. Can I do the following:
  1. Configure a virtual interface (hme0:1) on ns2 server with the IP
address 172.26.70.3 <http://172.26.70.3>.
 2. Setup ns3.au.ap.company.com <http://ns3.au.ap.company.com> as another
master server for au.ap.company.com <http://au.ap.company.com> on
ns2.au.ap.company.com <http://ns2.au.ap.company.com> with
the IP 172.26.70.3 <http://172.26.70.3>.
 eg: ns3.au.ap.company.com <http://ns3.au.ap.company.com>. IN A
172.26.70.3<http://172.26.70.3>
 3. Ask the parent zone administrator to update the delegation information.
 4. Copy/rsync named.conf file and zone files from
ns1.au.ap.abnamro.com<http://ns1.au.ap.abnamro.com>
.
 5. Run 2 named instances on
ns2.au.ap.abnamro.com<http://ns2.au.ap.abnamro.com>.
One for master (ns3) and one for slave (ns2).
 This is just for DR test, we are not going to have this setup running all
the time. We want to have both
master and slave running in the DR test and we dont have any spare machines
to do this. Could someone
tell me if this works or not. When we do the DR test ns1 server will be
shutdown. So, I have to run
both master and slave on one machine (on ns2).
 What should be the soa for
ns3.au.ap.company.com<http://ns3.au.ap.company.com>master? If someone
has tried a similar setup please help me.
 Thanks.