Allied Telesis AT-SBx8, Installation Manual

Page: 208 / 248

Chapter 11: Troubleshooting
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AT-SBx81CFC400 Controller Fabric Card
If the chassis has one controller card and the card fails, all network
operations stop. The Ethernet line cards stop forwarding all network traffic
until the controller card is replaced.
If the chassis has two controller cards and one fails, the Ethernet line
cards continue to forward traffic, but the bandwidth of the backplane is
reduced, which, depending on the number of Ethernet line cards present
and the amount of traffic traversing the backplane, may result in slower
network operations.
If the chassis has one controller card, examine the M/S LED on the card.
The LED should be solid green. If the LED is flashing amber, the card is
initializing its management software. Wait one or two minutes for the card
to complete the process and check the LED again. If it has not changed to
solid green, the card cannot complete the initialization process. Try
moving the controller card to the other controller card slot, slot 5 or 6, to
see if it works in a different slot. You might also try connecting a terminal
or PC with a terminal emulator program to the Console RS232 port to
watch for any error messages.
If the chassis has two controller cards, check the M/S LEDs on both cards.
The LEDs should be solid green on one card and solid or flashing amber
on the other card. If the LEDs are both flashing amber, they are initializing
their management software. Wait one or two minutes for the cards to
complete the process and check the LEDs again. If both LEDs are still
flashing amber, the cards cannot complete the initialization process. Try
replacing the cards.
The controller card has an onboard battery to maintain the date and time
when the chassis is powered off or reset. If you manually set the date and
time but the card loses the information after you power off or reset the unit,
you may have forgotten to remove the battery insulator when you installed
the card in the chassis. The insulator is shown in Figure 65 on page 124.
The only way to remedy the problem is to remove the controller card from
the chassis and remove the battery insulator. If the chassis has only one
controller card, removing the card causes the Ethernet line cards to stop
forwarding traffic.