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Catalyst 6500 Series Switch Command Reference—Release7.6
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Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands
test cable-diagnostics
test cable-diagnostics
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.
test cable-diagnostics prbs {start | stop} mod/port
test cable-diagnostics tdr mod/port
Syntax Description
Defaults This command has no default settings.
Command Types Switch command.
Command Modes Privileged.
Usage Guidelines The PRBS test is currently available onl y on th e 1-port 10GBASE-E serial 10-Gigabit Ethernet module
(WS-X6502-10GE).
To run the PRBS test properly between two devices, you must start it on both ends of the cable. If the cable
is looped back, a single end can generate the test sequence (on the Tx) as well as verify it and count the errors
(on the Rx).
Before the PRBS test starts, the port is automatically put in errdisable state. The errdisable timeout is
disabled for the port so that the port is not automatically reenabled after the timeout interval concludes.
The errdisable timeout is automatically reenabled on the port after the PRBS test finishes.
When the PRBS test is running, the system will not you permit you to enter the set port enable and set
port disable commands.
The TDR test is currently available only on the 48-port 10/100/1000 BASE-T modules
(WS-X6148-GE-TX and WS-X6548-GE-TX).
Note When you run the TDR test, we recommend that you do not make any configurations on the port
that you are testing or enter the show port command for that port. If you make any port-related
configurations or enter the show port command, the TDR test results might be inaccurate or the
module might fail.
prbs Specifies the Pseudo Random Binary Sequence (PRBS) test on a 10-Gigabit
Ethernet link.
start Activates the test.
stop Deactivates the test.
mod/port Number of the module and the port on the mod ule.
tdr Activates the Time Domain Reflectometer (TDR) test for copper cables on
48-port 10/100/1000 BASE-T modules.