That is funny I have it running on another 3560 on a FastE port. The main differece is that the switch it works on is running EMI and not SMI

Port Name Status Vlan Duplex Speed Type

Fa0/8 connected trunk a-full a-100 10/100BaseTX

#test cable-diagnostics tdr interface fastEthernet 0/8

Link state may be affected during TDR test

TDR test started on interface Fa0/8

A TDR test can take a few seconds to run on an interface

Use 'show cable-diagnostics tdr' to read the TDR results.

sh cable-diagnostics tdr interface fastEthernet 0/8

TDR test last run on: March 04 14:54:44

Interface Speed Local pair Pair length Remote pair Pair status

--------- ----- ---------- ------------------ ----------- --------------------

Fa0/8 100M Pair A 4 +/- 15 meters Pair B Normal

Pair B 4 +/- 15 meters Pair A Normal

Pair C N/A Pair D Not Supported

Pair D N/A Pair C Not Supported

Why would it give you the option for FastE if you can't use it?

#test cable-diagnostics tdr interface ?

FastEthernet FastEthernet IEEE 802.3

GigabitEthernet GigabitEthernet IEEE 802.3z

Anyone????

That is strange. My source came straight from the release notes/command reference. I am surprised that it does work on the EMI image and not the SMI image.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_see/command/reference/cli3.html#wp2168243

Mark

What is odd is that does work on 10/100 ports. I though it was the different between SI and EI code but it doesn't seem to be. The switch it is working on is a 3560-8 and we also have a 2960 that it is working on.

2960

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 and 10/100/1000 copper Ethernet ports. It is not supported on SFP module ports.

http://www.ciscosystems.com/en/US/docs/switches/lan/catalyst2960/software/release/12.2_25_fx/configuration/guide/swtrbl.html

3560

Understanding TDR

In Cisco IOS Release 12.2(25)SE or later, 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 10/100 ports or on SFP module ports.

http://www.ciscosystems.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_sed/configuration/guide/swtrbl.html#wp1186482

I'd guess the 3560-8 isn't in the same boat as the rest of the 3560's. It is probably more of a 2960-8 then a 3560.