Failure to disable auto-MDIX will interfere with the TDR test and generate false results.
Do not start the test at the same time on both ends of the cable.The valid values for interface type are fastethernet and gigabitethernet.See the Release Notes for Cisco IOS Release 12.2SX on the Catalyst 6500 and Cisco 7600 Supervisor Engine 720, Supervisor Engine 32, and Supervisor Engine 2 for the list of the modules that support TDR.
Support for this command on the Supervisor Engine 2 was extended to Release 12.2(17d)SXB.
This command was changed to provide support for the 4-port 10GBASE-E serial 10-Gigabit Ethernet module (WS-X6704-10GE).
Support for this command was introduced on the Cisco 7600 series routers. Specifies the interface type see the "Usage Guidelines" section for valid values. Test cable-diagnostics tdr interface type number Syntax DescriptionĪctivates the TDR test for copper cables on 48-port 10/100/1000 BASE-T modules. To test the condition of 10-Gigabit Ethernet links or copper cables on 48-port 10/100/1000 BASE-T modules, use the test cable-diagnostics command in privileged EXEC mode.