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

Troubleshooting

Diagnostic Flowcharts

Chapter 4 41

Flowchart 3 Procedures

A. Check /etc/hosts and /etc/nsswitch.conf ﬁles. If needed, add a missing host

name or IPv6 address. If the IPv6 address for the host is in /etc/hosts,

ensure that you have an /etc/nsswitch.conf ﬁle entry with an

appropriate ipnodes policy. For example,

ipnodes: DNS [NOTFOUND=continue] files

and start again with Flowchart 3.

B. Using DNS? If your name and IPv6 address resolution policy use DNS as

the primary resolver, go to C. Otherwise, proceed to E.

C. Can you add a Host Name to the DNS Server? Are you a DNS

administrator? If so, continue on to D, otherwise proceed to F.

D. Add Entry to DNS Server. Refer to the BIND 9.2.0 information in the

HP-UX IP Address and Client Management Administrator’s Guide for

details (available at http://docs.hp.com). Then retry Flowchart 2.

E. Add entry to /etc/hosts. If your name and IPv6 address resolution policy

uses /etc/hosts as the primary resolver, add a correct IPv6 address and

host name to the local /etc/hosts ﬁle. Then retry Flowchart 2.

F. Add entry to /etc/hosts and ensure that nsswitch.conf is conﬁgured properly.

Add a correct IPv6 address and host name to the local /etc/hosts ﬁle.

Ensure that your IPv6 address resolution policy, speciﬁed with the ipnodes

keyword in /etc/nsswitch.conf includes using “ﬁles” (/etc/hosts) in the

policy. Then retry Flowchart 2.

G. ping -f inet6 hostname. Test connectivity to the remote host using the ping

command.

H. ping successful? If ping -f inet6 <hostname> succeeds using a host name

and IPv6 address from /etc/hosts, DNS needs updating, proceed to I. If

ping fails, examine the /etc/hosts, /etc/resolv.conf, and

/etc/nsswitch.conf ﬁles on both the local and remote hosts. If all look

correct, call your HP representative for help.

I. Work with DNS Administrator to add entry to DNS Server. When entry is

added, retry Flowchart 2 to ensure that DNS correctly resolves host names

and IPv6 addresses.