Users Guide

NOTE: This is true even if the unit is the master (in a HA chassis environment – as in the case of RPM) or a Stack
master or standby (as in case of S3048-ON).
LBQA (LPC Bus Quality Analyzer) Failure Detection mode
The following functions are performed as a part of this mode:
1. The LBQA will be started as part of FTOS application init (typically as a poller in sysd).
2. The LBQA will run as a fast poller (typically 1 sec) in failure detection mode.
3. During every fast poll cycle, LBQA will be the first poller to run.
4. In failure detection mode, the LBQA will issue a single IOCTL for each poll interval, which may in-turn issue multiple LPC
operations (write & read-back) to check the sanity of the LPC bus using the scratch register.
5. The LBQA will use an extended walking 1s/0s test along with a pattern based test (0x00, 0x55, 0xAA, 0xFF) that is
staggered across several polls.
6. The LBQA will limit each sanity check to a maximum of 16 operations (read + write).
7. LBQA will use a variable number of sanity checks over time, it would perform at least 1 check during every poll interval but
will perform 8 checks during a signal poll once in 5 seconds.
8. The LBQA can be disabled on a system wide basis (i.e all stack-units or line cards as applicable) through a CLI command.
Reloading the system
You can reload the system using the reload command. To reload the system, follow these steps:
● Reload the system into Dell EMC Networking OS.
EXEC Privilege mode
reload
● Reload the system if a configuration change to the NVRAM requires a device reload.
EXEC Privilege mode
reload conditional nvram-cfg-change
● Reload the system into the Dell diagnostics mode.
EXEC Privilege mode
reload dell-diag
● Reload the system into the ONIE mode.
EXEC Privilege mode
reload onie [install | uninstall | rescue]
Use the install parameter to reload the system and enter the Install mode to install a networking OS.
Use the uninstall parameter to reload the system and enter the Uninstall mode to uninstall a networking OS.
Use the rescue parameter to reload the system and enter the Rescue mode to access the file system.
The following example shows how to reload the system:
DellEMC# reload
Proceed with reload [confirm yes/no]: yes
The following example shows how to reload the system into Dell diagnostics mode:
DellEMC#reload dell-diag
Proceed with reload [confirm yes/no]: yes
The following example shows how to reload the system into ONIE mode:
DellEMC#reload onie
Proceed with reload [confirm yes/no]: yes
Management
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