Troubleshooting guide
11
Special Considerations
LSCle00710 Checking Software
No procedure is described for checking software on the standby NP.
When you verify a software installation using the ckswinstall utility on a redundant-NP system, the
software installation on each of the two NPs must be checked explicitly. Here are the procedures for
doing so:
Step 1 Run ckswinstall on the current primary NP.
Step 2 Run ckswinstall on the current backup NP.
bash# rsh other-np ckswinstall ...
LSCle00711 rdist
Periodic rdist to the secondary NP doesn’t check for disk space available.
On a redundant NP system, an automatic mechanism updates software and configuration
information, taking data from the current primary NP and applying it to the current secondary NP.
If the current secondary NP runs out of disk space, the secondary NP is not kept consistent with the
primary NP. Furthermore, no error is reported.
Workaround: Establish a regular maintenance procedure for checking disk space availability on
both NPs.
LSCle00726 Disk Tray Assembly
Insertion of the disk tray assembly can cause damage to connectors.
Rapid insertion of the disk tray assembly can defeat the guiding mechanism and may damage the
pins of the connectors. Use care when inserting or removing the disk tray.
LSCle00760 Switch Fault LED
The Switch Fault LED lights when a redundant power supply is inserted.
The switch fault LED lights if a power tray is present, but is not generating 48 volts. When a power
supply is inserted, it can take up to 750 ms to produce 48 volts after AC power is supplied. If the
system checks the power supply during these 750 ms, it finds that the system is not generating
48 volts and sets the DC OK signal to False. In this circumstance, ignore the fault LED. Normal
operation is never interrupted.
LSCle00767 SC-HUB (with Release 1 Switch Card)
You do not need to enable the NP after a power-off/power-on sequence (Release 1 switch cards
only).
The proper sequence to bring up a card from the TCS HUB after a power slot off command is to
issue the reset slot command. This turns on the card power and initiates the card boot sequence.
Issuing a power slot on command only turns the card VCC on; it does not initiate the card boot
sequence.