nsupdate and round robin

[Mark Andrews]

> Masters,
> 
> i need setup dns with option of "round robin" and this is my actual
> zone file (only relevant lines):
> 
> --------------------------------------------
> $TTL 3600               ; 1 day
> @       IN      SOA     mamalluca.sitio.cl.         root.sitio.com. (
>                                2006112801; serial
>                                7200; refresh (12 hours)
>                                7200; retry (2 hours)
>                                2419200; expire (30 days)
>                                3600; minimum (1 day)
>                                )
> @       IN      NS      mamalluca.sitio.cl.
> @       IN      NS      ns0.xname.org.
> @       IN      NS      ns1.xname.org.
> 
> @       IN      A       200.200.200.200
> @       IN      MX      10 mamalluca.sitio.cl.
> @       IN      TXT     "v=spf1 a"
> 
> 
> www     60      IN      A       200.200.200.201
> www     60      IN      A       200.200.200.202
> www     60      IN      A       200.200.200.203
> --------------------------------------------
> 
> 
> but my original idea was use multiples CNAMEs, for example:
> --------------------------------------------
> www     60      IN      CNAME      server1
> www     60      IN      CNAME      server2
> www     60      IN      CNAME      server3
> 
> server1    60      IN      A       200.200.200.201
> server2    60      IN      A       200.200.200.202
> server3    60      IN      A       200.200.200.203
> --------------------------------------------
> 
> but... restarting the bind daemon with this options (multiples cnames)
> i get this errors:
> (now.. I understand that BIND9 not permit multiples-cnames options !!!)    :-
> (
> --------------------------------------------
> sitio.cl-local:46: TTL set to prior TTL (60)
> dns_master_load: sitio.cl-local:46: www.sitio.cl: multiple RRs of singleton t
> ype
> zone sitio.cl/IN/interno: loading master file sitio.cl-local: multiple
> RRs of singleton type
> --------------------------------------------
> 
> 
> and now.. my system work fine con the first example (no multiples
> CNAMEs), but i have a new problem !!!
> 
> i need append one new machine in this configuration, but this new
> machine have one dynamic IP, for example:
> 
> www     60      IN      A       DINAMIC_IP
> 
> I'm using "nsupdate" for update the host in other zone file without round rob
> in,
> # nsupdate
> > update delete www A
> > update add www 60 A 200.100.50.204
> > send
> 
> 
> but, i don't know how delete/update the specific host (www 60 IN A
> DINAMIC_IP) and not other www hosts for this zone with round robin
> options !!!

nsupdate
update delete www.<zone> A <oldaddress>
update add www.<zone>. 60 A <newaddress>
send

> they understand my doubt? somebody already passage by this problem?
> suggestion of like solving this ???
> 
> thanks
> 
> -- 
> -- 
> Victor Hugo dos Santos
> Linux Counter #224399
> 
> 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org