HP-UX IP Address and Client Management Administrator's Guide HP-UX 11i v2, HP-UX 11i v3
7 This level logs the journals added and deleted, and a count of the number of bytes returned
by a zone transfer.
8 This level logs the following dynamic update messages: prerequisite checks, writing journal
entries, and rollbacks. This level also logs several low-level zone transfer messages and the
resource records sent in a zone transfer.
10 This level logs zone timer activity messages.
20 This level logs updates to a zone’s refresh timer.
90 This level logs low-level operation of the BIND 9 task dispatcher.
At certain debugging levels, the actual packets are displayed. See RFC 1035 (Domain Names –
Implementation and Specification) for the format of DNS packets.
Dumping the Name Server Database
You can also track BIND problems by understanding the name server’s internal database dump.
You can use the rndc command to dump named’s authoritative data, cached data, and hints
data to the file, named_dump.db, in BIND’s working directory.
Issue the following command to generate the dump file, named_dump.db:
# rndc dumpdb
For more information on the rndc command, type man 1M rndc at the HP-UX prompt.
Problem Symptoms
This section describes symptoms of common name server problems, and lists possible problems
to check for. A description of the problems appears in “Name Server Problems” (page 92).
• After configuring the master server for the first time, names in the local domain cannot be
found. Check the following:
— Problem 2, Syntax Errors
— Problem 1, Incorrect hosts_to_named Parameters
— Problem 8, Local Domain Not Set
• After configuring the master server for the first time, names in the local domain can be
found, but names in remote domains fail. Check the following:
— Problem 3, Missing Cache Information
— Problem 5, Network Connectivity
— Problem 7, Incorrect Delegation of Subdomain
• After configuring the local host to use a remote server, all name lookups fail, or only names
in the NIS database or /etc/hosts are found. The server on the remote host is configured
properly. Check the following:
— Problem 4, Syntax Errors in /etc/resolv.conf
— Problem 8, Local Domain Not Set
— Problem 9, /etc/nsswitch.conf Not Configured Correctly
• A remote name lookup now fails that has completed successfully before. Check the following:
— Problem 5, Network Connectivity
— Problem 2, Syntax Errors
— Problem 4, Syntax Errors in /etc/resolv.conf
— Problem 10, /etc/hosts or NIS contains Incorrect Data
• A local name lookup now fails that has completed successfully before. Check the following:
— Problem 2, Syntax Errors
— Problem 6, Slave Server Unable to Load from Another Slave Server
— Problem 4, Syntax Errors in /etc/resolv.conf
Troubleshooting the BIND Name Server 91