Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 247

To test the condition of cables on 100/1000/10000 BASE-T modules, following these steps using the tdr-cable-test command. Step Command Syntax 1 tdr-cable-test tengigabitethernet / Command Mode EXEC Privilege 2 show tdr tengigabitethernet / EXEC Privilege Usage To test for cable faults on the TenGigabitEthernet cable. • Between two ports, you must not start the test on both ends of the cable. • Enable the interface before starting the test. • The port must be enabled to run the test or the test prints an error message. Displays TDR test results. Splitting QSFP Ports to SFP+ Ports The MXL 10/40GbE switch supports splitting a 40GbE port on the base module or a 2-Port 40GbE QSFP+ module into four 10GbE SFP+ ports using a 4x10G breakout cable. Note: By default, the 40GbE ports on a 2-Port 40GbE QSFP+ module come up in 4x10GbE (quad) mode as eight 10GbE ports. On the base module, you must convert the 40GbE ports to 4x10GbE mode as described below. Command Syntax stack-unit stack-unit port number portmode quad Command Mode Purpose CONFIGURATION Split a single 40G port into 4-10G ports. stack-unit: Enter the stack member unit identifier of the stack member to reset. Range: 0 to 5 To display the stack-unit number, enter the show system brief command. port : Enter the port number of the 40G port to be split. Valid values on base module: 33 or 37; OPTM SLOT 0: 41 or 45; OPTM SLOT 1: 49 or 53. portmode quad: Identifies the uplink port as a split 10GbE SFP+ port. Then save the configuration and reload the switch. FTOS# write memory FTOS#reload Interfaces | 245