Reference Guide

1082 | E-Series TeraScale Debugging and Diagnostics
www.dell.com | support.dell.com
• If a line card runtime loopback test fails, the system does not launch an SFM walk. A message is
logged indicating the failure.
The runtime dataplane loopback test is enabled by default. To disable this feature, use the following
command.
Disable RPM-SFM walk
If a full set of SFMs are online during the runtime loopback test and an RPM-SFM runtime loopback test
failure occurs, an automatic SFM walk is launched in an attempt to determine if the failure is due to a
faulty SFM. If confirmed, the single faulty SFM is identified and disabled by default.
To disable the automatic SFM walk that is launched after an RPM-SFM runtime loopback test failure, use
the following command in CONFIGURATION mode.
RPM-SFM bring down
If a full set of SFMs are online during the runtime loopback test and a RPM-SFM runtime loopback test
failure occurs, an automatic SFM walk is launched in an attempt to determine if the failure is due to a
faulty SFM. If confirmed, the single SFM is identified and disabled (bringdown) by default.
To disable the automatic bring-down of an SFM that is identified by the SFM walk during the RPM-SFM
runtime loopback test, use the following CONFIGURATION mode command.
Message 3 Loopback test failure
%TSM-2-RPM_LOOPBACK_FAIL: Linecard-SFM dataplane loopback test failed on linecard 6
Task Command Mode
Disable the runtime loopback test on the primary RPM and line cards.
To re-enable, use the
no dataplane-diag disable loopback command
dataplane-diag
disable loopback
CONFIGURATION
Note: Disabling the runtime loopback test prevents the sfm-walk command and sfm-bringdown
commands from taking effect.
Task Command Mode
Disable the automatic SFM walk that is launched after an
RPM-SFM runtime loopback test failure.
To re-enable the automatic SFM walk, use the no
dataplane-diag disable sfm-walk
command.
dataplane-diag disable sfm-walk
CONFIGURATION
Note: Disabling the sfm-walk command prevents the sfm-bringdown command from taking effect.