HP ProCurve 2610-24, Management And Configuration Manual

Page: 432 / 464

Troubleshooting
Diagnostic Tools
Intermediate router hops
with the time taken for the
switch to receive
acknowledgement of
each probe reaching each
router.
Destination IP Address
Figure C-18. Example of a Completed Traceroute Enquiry
Continuing from the previous example (figure C-18, above), executing
traceroute with an insufficient maxttl for the actual hop count produces an
output similar to this:
Traceroute does not reach
destination IP address
because of low
maxttl
setting.
The asterisk indicates there was a
timeout on the second probe to the third
hop.
Figure C-19. Example of Incomplete Traceroute Due to Low Maxttl Setting
If A Network Condition Prevents Traceroute from Reaching the
Destination.
Common reasons for Traceroute failing to reach a destination
include:
■
Timeouts (indicated by one asterisk per probe, per hop; refer to figure
C-19, above.)
■ Unreachable hosts
■ Unreachable networks
■
Interference from firewalls
■
Hosts configured to avoid responding
C-42