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

Troubleshooting

Diagnostic Flowcharts

Chapter 4 39

Flowchart 2 Procedures

A. Execute ping to remote IPv6 “host name”. Using ping, send an ICMPv6

message to the remote host with which you are having problems connecting.

For example, the remote host name is hpindon. Enter:

ping -f inet6 hpindon

B. ping successful? A message is printed on stdout for each ping packet

returned by the remote host. If packets are being returned, your system has

network level connectivity to the remote host.

C. Execute ping to remote IPv6 address. Using ping, send a message to the

IPv6 address of the remote host. For example,

ping -f inet6 8:7:6:5:4:3:2:1

D. Network unreachable? If so, examine the status of the local LAN interface

ﬁrst. If not, proceed to F.

E. Local LAN interface up? Execute ifconfig on the local interface to be sure

it is conﬁgured up. If it is not, go to G. If it is up, call your HP representative

for help.

F. Command hangs? If a message is not returned after executing ping, go to

Flowchart 4, otherwise go to H.

G. Conﬁgure interface up. If you ﬁnd the local interface is not up, execute

ifconfig with the appropriate ﬂags set. Begin Flowchart 2 again. If the

problem persists, go to Flowchart 4.

H. Unknown host? (Error= Unknown host <hostname>?) If so, there is a

problem with the IPv6 address conﬁguration for the host <hostname> in the

/etc/hosts ﬁle or on the name server. Go to Flowchart 3. Otherwise,

proceed to I.

I. No route to host? (Error= Sendto: No route to host?) Use netstat -rn to

examine the routing table. If there is no route to host, go to J. Otherwise,

call your HP representative for help.

J. Check IPv6 Router or add route table entry. Add a route table entry to that

host, or ensure that the IPv6 router advertises correct preﬁxes. Then try

Flowchart 2 again. If the problem persists, go to Flowchart 6.