HP PROCURVE 6600 Manual de usuario descargar pdf (Pagina 754)

100

101

Troubleshooting

Diagnostic Tools

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-25, above.)

■ Unreachable hosts

■ Unreachable networks

■ Interference from firewalls

■ Hosts configured to avoid responding

Executing traceroute where the route becomes blocked or otherwise fails

results in an output marked by timeouts for all probes beyond the last detected

hop. For example with a maximum hop count of 7 (maxttl = 7), where the route

becomes blocked or otherwise fails, the output appears similar to this:

At hop 3, the first and

third probes timed out

but the second probe

reached the router.

All further probes

within the maxttl

timed-out without

finding a router or the

destination IP

address.

An asterisk indicates a timeout

without finding the next hop.

Figure C-26. Example of Traceroute Failing to Reach the Destination Address

C-70

1 2 ... 749 750 751 752 753 754 755 756 757 758 759 ... 853 854

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