Using Tdr; Understanding Tdr - Cisco Catalyst 3120 Software Manual
Catalyst blade switch for hp
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Also See for Catalyst 3120:
- Command reference manual (982 pages) ,
- Hardware installation manual (76 pages) ,
- Manual (42 pages)
Table of Contents
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Chapter 47
Troubleshooting
This example shows how to perform a traceroute to an IP host:
Switch# traceroute ip 171.9.15.10
Type escape sequence to abort.
Tracing the route to 171.69.115.10
1 172.2.52.1 0 msec 0 msec 4 msec
2 172.2.1.203 12 msec 8 msec 0 msec
3 171.9.16.6 4 msec 0 msec 0 msec
4 171.9.4.5 0 msec 4 msec 0 msec
5 171.9.121.34 0 msec 4 msec 4 msec
6 171.9.15.9 120 msec 132 msec 128 msec
7 171.9.15.10 132 msec 128 msec 128 msec
Switch#
The display shows the hop count, the IP address of the router, and the round-trip time in milliseconds
for each of the three probes that are sent.
Table 47-2
Character
*
?
A
H
N
P
Q
U
To end a trace in progress, enter the escape sequence (Ctrl-^ X by default). Simultaneously press and
release the Ctrl, Shift, and 6 keys and then press the X key.
Using TDR
These sections contain this information:
•
•
Understanding TDR
You can use the Time Domain Reflector (TDR) feature to diagnose and resolve cabling problems. When
running TDR, a local device sends a signal through a cable and compares the reflected signal to the initial
signal.
TDR is supported only on 10/100/1000 copper Ethernet ports. It is not supported on 10-Gigabit Ethernet
ports and on SFP module ports.
OL-12247-01
Traceroute Output Display Characters
Description
The probe timed out.
Unknown packet type.
Administratively unreachable. Usually, this output means that an access list is
blocking traffic.
Host unreachable.
Network unreachable.
Protocol unreachable.
Source quench.
Port unreachable.
Understanding TDR, page 47-15
Running TDR and Displaying the Results, page 47-16
Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
Using TDR
47-15
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Chapters
Table of Contents
Troubleshooting
