Reference Guide

Usage
Information
If the TDR test has not been run, an error message is generated:
%Error: Please run the TDR test first
The following describes the TDR test status.
Status Definition
OK Status:
Terminated
TDR test is complete, no fault is detected on the cable, and the test is
terminated.
Length: 92 (+/- 1)
meters, Status:
Shorted
A short is detected on the cable. The location, in this Example is 92
meters. The short is accurate to plus or minus one meter.
Length: 93 (+/- 1)
meters, Status: Open
An opening is detected on the cable. The location, in this Example is
93 meters. The open is accurate to plus or minus one meter.
Status: Impedance
Mismatch
There is an impedance mismatch in the cables.
Example
FTOS#show tdr gigabitethernet 10/47
Time since last test: 00:00:02
Pair A, Length: OK Status: Terminated
Pair B, Length: 92 (+/- 1) meters, Status: Short
Pair C, Length: 93 (+/- 1) meters, Status: Open
Pair D, Length: 0 (+/- 1) meters, Status: Impedance Mismatch
Related
Commands
tdr-cable-test — runs the TDR test.
UDP Broadcast
The user datagram protocol (UDP) broadcast feature is a software-based method to forward low throughput (not to
exceed 200 pps) IP/UDP broadcast traffic arriving on a physical or VLAN interface.
Important Points to Remember
• This feature is available only on the S4820T platform.
• Routing information protocol (RIP) is not supported with the UDP Broadcast feature.
• If you configure this feature on an interface using the ip udp-helper udp-port command, the ip
directed-broadcast command becomes ineffective on that interface.
• The existing show interface command has been modified to display the configured broadcast address.
debug ip udp-helper
Enable UDP debug and display the debug information on a console.
S4820T
Syntax
debug ip udp-helper
To disable debug information, use the no debug ip udp-helper command.
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