Dell Force10 E300, Configuration Manual

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1202 | E-Series TeraScale Debugging and Diagnostics
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If the RPM-SFM or line card-SFM loopback test detects an SFM failure, an attempt is made to isolate a
single faulty SFM by automatically
walking the SFMs. For this failure case, error messages similar to the
runtime loopback test error are generated.
In the example in Figure 61-2 , the manual loopback tests is successful, and no SFM failure is detected.
Figure 61-2. diag sfm all-loopback command Example
If the test passes when the switch fabric is down and there are at least (max-1) SFMs in the chassis, then
the system will bring the switch fabric back up automatically. Like the runtime loopback test, the manual
loopback test failure will not bring the switch fabric down.
Power the SFM on/off
If you suspect that an SFM is faulty and would like to manually disable it to determine whether any packet
loss or forwarding issues are resolved, execute the following command.
Task Command Mode
Execute a manual dataplane
loopback test:
• all-loopback – Both the RPM
and the line card dataplane
loopback test is done.
• rpm-loopback – Only the RPM
dataplane loopback test is done.
This test can be run when the switch
fabric is in either an operational or a
non-operational state.
diag sfm
[
all-loopback | rpm-loopback
] EXEC
Note: The dataplane runtime loopback configuration does not apply to this manual loopback test.
Note: Line card-SFM loopback test failure, during the manual test, will trigger an SFM walk.
Task Command Mode
Power on or off a specific SFM.
power-
{
off | on
}
sfm
slot-number
EXEC
FTOS#diag sfm all-loopback
Proceed with dataplane loopback test [confirm yes/no]:yes
SFM loopback test completed successfully.
FTOS#