HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004, rev 2)

Configuration
Host Names and IPv6 Addresses
Chapter 3 31
System name in swinstall screen: host3
/etc/hosts file:
3ffe:ffff:101::230:6eff:fe04:d9ff host3 host3.site2.region4
192.1.2.34 hpfcrm loghost
NOTE HP-UX 11i v2 IPv6 bundled as part of TOUR 2.0 is a dual stack
implementation. A single host name can have entries for both an IPv6
address and an IPv4 address in /etc/hosts.
Name and Address Lookup for IPv6
/etc/nsswitch.conf (nsswitch.conf(4)) is a configuration file for the
name service switch. The ipnodes entity specifies which name services
resolve IPv4 and IPv6 addresses and host names on HP-UX 11i v2 IPv6
bundled as part of TOUR 2.0.
More specifically, on HP-UX 11i v2, the ipnodes keyword specifies the
resolver policy for the library functions getnameinfo(3N),
getaddrinfo(3N), getipnodebyname(3N) and getipnodebyaddr(3N)
for both IPv4 and IPv6 addresses. The existing keyword “hosts” specifies
the resolver policy for the library functions gethostbyname() and
gethostbyaddr() for IPv4 addresses.
NOTE Internet Services applications (such as telnet, r-commands, etc.) use
these library functions to resolve IPv4 and IPv6 addresses.
By default, the /etc/nsswitch.conf is not on the system. The default
ipnodes policy (same as default hosts policy) is as follows:
dns [NOTFOUND=return] files
This policy implies that dns is the authoritative resolver and will only
try files if dns is down. If dns is available but returns NOTFOUND, the
search stops.
Thus, if DNS has not been set up as the definitive source, and files
(/etc/hosts) may need to be used for address and host name resolution,
HP recommends adding the following entry to /etc/nsswitch.conf: