2–12
DECbridge 500/600 Problem Solving
Table 2–1 (Cont.): Problem Solving Via the LEDs
Symptom
Probable Cause
Corrective Actions
FI Module LEDs:
FI_BAD remains on
External Loopback
Check the Enable External Loopback switch.
(and AP_BAD is off).
switch
The switch must be in the OFF (up) position for
normal bridge operation.
(and PHY_1 or 2 red).
Port broken
Perform loopback test, as described in Section 2.4.6.
If port is OK during loopback test, check transmit
and receive power, as described in Section 2.4.7.
Bad FI module
Replace the FI module (Section 3.3.2).
FI_BAD blinking.
Incompatible
Load compatible firmware or replace the AP module
firmware loaded
with one containing a compatible firmware revision
(Section 3.3.2).
FWD1 blinking green.
FI port in broken
Perform loopback test, as described in Section 2.4.6.
state
FWD1 off.
FI Port in pre-
Wait 1 minute and verify that the bridge goes into
forwarding or
forwarding state, indicating proper bridge operation.
backup state
Check line costs and enable state using network
management software.
Check the spanning tree topology using network
management software.
PHY_1 or 2 remains off.
Bad LED
Replace FI module.
PHY_1 blinking red
Bad module or
Install the FI loopback connector. If this corrects the
(SAS bridges).
cable
problem, check the interface cable. If this does not
correct the problem, replace the FI module (and the
AP module, if necessary).
PHY_1 or PHY_2 blinking
Illegal topology
Notify the system manager. Reconfigure the cable
red (DAS bridges).
connections or ring topology.
