HP-UX IP Address and Client Management Administrator's Guide HP-UX 11i v2, HP-UX 11i v3

6. Slave master is unable to load from another master. This may be caused by a configuration
error or problems with network connectivity. Verify that the domain being loaded and the
address of the remote server are correct in the configuration file.
• syslogd
An error message is logged indicating the master server for the secondary zone is
unreachable.
• Name server debugging output
Start the slave server at debugging level 2 or 3. Watch for error messages in the debug
output. These could show that the other server is unreachable, the other server is not
authoritative for the domain, or the local SOA serial number is higher than the remote
SOA serial number for this zone.
• ping IP_address
Verify connectivity to the server the secondary is trying to load from. If the host is
temporarily unreachable, the slave server will load when it is reachable.
• nslookup
Use nslookup and set the name server to the master the secondary is trying to load
from.
$ nslookup
> server server_name or IP_address
> ls domain
The ls command initiates a zone transfer. If the error message is No response from
server, then no server is running on the remote host. If the ls command succeeds,
the secondary should be able to load the data from this server.
7. Incorrect subdomain delegation may be caused by missing or incorrect NS or A records in
the parent server for the subdomain.
• nslookup
Use nslookup to query the parent server for delegation information. Execute the
following:
$ nslookup
> server parent_server_name or
IP_address
> set type=ns
> subdomain_name
This must show you the NS and A records for the subdomain servers, as seen in the
following example. In the example, the subdomain is delegated correctly.
hershey.div.inc.com:rootk> nslookup
Default Name Server: hershey.div.inc.com
Addresses: 15.19.14.100, 15.19.15.100
hershey is the default name server for this host.
> server eduardo.doc.inc.com.
Default Name Server: eduardo.doc.inc.com
Address: 15.19.11.2
Set the default name server to be this subdomain’s parent server, eduardo.
> set type=ns
> div.inc.com
Name Server: eduardo.doc.inc.com
Address: 15.19.11.2
94 Configuring and Administering the BIND Name Service