C-63
Troubleshooting
Diagnostic Tools
A Low Maxttl Causes Traceroute To Halt Before Reaching the
Destination Address. For example, executing traceroute with its default
values for a destination IP address that is four hops away produces a result
similar to this:
Figure C-14. Example of a Completed Traceroute Enquiry
Continuing from the previous example (Figure C-14, above), executing
traceroute with an insufficient maxttl for the actual hop count produces an
output similar to this:
Figure C-15. Example of Incomplete Traceroute Due to Low Maxttl Setting
[source <ip-addr | vlan-id> | oobm]
The source IP address or VLAN. The source IP address must
be owned by the router. If a VLAN is specified, the IP address
associated with the specified VLAN is used. For switches that
have a separate out-of-band management (OOBM) port,
oobm specifies that the traffic originates from the out-of-
band management port.
Intermediate router hops
with the time taken for the
switch to receive
acknowledgement of
each probe reaching each
router.
Destination IP Address
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.
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