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326 Chapter 14 ClusterCATS Utilities
btcfgchk DNS errors
The
btcfgchk
utility reports on DNS configuration problems. ClusterCATS requires
that your DNS be configured with correct forward and reverse mappings. A forward
mapping (AName record) translates the host name to an IP address. Conversely, a
reverse mapping (PRT record) translates an IP address to its host name. ClusterCATS
expects the mapping to be one-to-one (one host name to one IP Address).
Error Description
Host name does not map to
a single IP address The main host name for this system is not mapping to
one IP address. Possible problems are:
•
The main host name of the system could not be
resolved to any IP address.
Your fully qualified host name is the combination of the
host name and the domain name. Make sure no typos
appear in these names in your DNS definitions, both on
the DNS server and on each cluster member’s DNS
definition.
To verify that the host name is correct, enter
nslookup
< FQHN >
at a command-line prompt.
•
The host name is a round-robin DNS name. Run the
ClusterCATS
hostinfo
utility to see if more than one
IP address is configured for the domain. For more
information on using
hostinfo , see “Using hostinfo”
on page 328 .
No adapter associated with
host name found
btcfgchk
is unable to find the primary network adapter.
The primary network adapter should be the network
adapter containing the IP address of the main host name.
Duplicate Primary Adapter
btcfgchk
found two network adapters with the same IP
address. Use the
ifconfig -a
command to see
information about your adapter.
Name lookup for
<hostname> failed btcfgchk was not able to determine the IP address for
the specified host. Your DNS server may be down. Use
nslookup
to see if it can contact your DNS server.
<IP_address1> reverse
maps to <hostname> which
then forward maps to
<IP_address2> btcfgchk did a lookup on <IP_address1> and found a
host name to which it is mapped. It then attempted to
verify that this host name maps back to the IP address
specified, and the verification failed.
There is likely an issue with your DNS configuration. Use
the ClusterCATS
hostinfo
utility to gather more
information on how the names and IP address are
configured. For more information on using
hostinfo
,
refer to “Using hostinfo” on page 328 .