Dell S6000-ON, Configuration Manual

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Maintenance Using TDR
The time domain reflectometer (TDR) is supported on all Dell Networking switch/routers.
TDR is an assistance tool to resolve link issues that helps detect obvious open or short conditions within
any of the four copper pairs. TDR sends a signal onto the physical cable and examines the reflection of
the signal that returns. By examining the reflection, TDR is able to indicate whether there is a cable fault
(when the cable is broken, becomes unterminated, or if a transceiver is unplugged).
TDR is useful for troubleshooting an interface that is not establishing a link; that is, when the link is
flapping or not coming up. TDR is not intended to be used on an interface that is passing traffic. When a
TDR test is run on a physical cable, it is important to shut down the port on the far end of the cable.
Otherwise, it may lead to incorrect test results.
NOTE: TDR is an intrusive test. Do not run TDR on a link that is up and passing traffic.
To test and display TDR results, use the following commands.
1. To test for cable faults on the TenGigabitEthernet cable.
EXEC Privilege mode
tdr-cable-test tengigabitethernet slot/port/subport
Between two ports, do not start the test on both ends of the cable.
Enable the interface before starting the test.
Enable the port to run the test or the test prints an error message.
2. Displays TDR test results.
EXEC Privilege mode
show tdr tengigabitethernet slot/port/ subport
Fanning out 40G Ports Dynamically
The device supports the Fan-out Interfaces without reboot on Dell Networking OS. It aims at converting
the 40G ports into 10G mode without reboot. The switch has the facility to dynamically change the 40G
port to 4X10G port and vice-versa without reload.
By adding this feature, the number of reloads are reduced and traffic disruption is only seen in fanned out
or fanned in ports.
• On a device, fan-out profile constructs automatically with default 24 ports
(2,4,6,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,27,29,31) . These ports can be changed to
40G to 10G mode or vice-versa without reload.
• When a non-supported profile release is upgraded to a supported profile release, the fan-out
configured ports get automatically included in the profile. In fan-out mode, if a system is upgraded
with 25 or 26 ports, only 24 ports get upgraded to fan-out mode. The rest of the ports put to default
40G mode.
• In stacking, configure profile first before provisioning for new units. Otherwise it is mandatory to
reload for profile to take effect.
Interfaces
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