Problem Solving
2–13
Table 2–1 (Cont.): Problem Solving Via the LEDs
Symptom
Probable Cause
Corrective Actions
PHY_1 or 2 solid red
Port failed Line
Test is continuously repeated at 0.5, 5, and 50
(and FI_BAD off).
Confidence Test
second intervals until it passes. If error condition
(LCT)
persists, perform loopback test, as described in
Section 2.4.6. Also check optical power.
PHY_1 or 2 blinking green. Connection in
Connection may take up to 1 minute to achieve.
progress
PHY_1 or 2 remaining in this state may be caused
by very poor signal quality.
Make sure the cable is fully connected and the
connecting unit on the far end is powered up.
If PHY_1 or 2 is still blinking green, perform the
loopback test, as described in Section 2.4.6.
QM Module LEDs:
QM_BAD remains on
QM module failed
Replace the QM module (Section 3.3.2).
(and AP_BAD is off).
self-test diagnostic
FI module is causing Replace the FI module (Section 3.3.2).
QM module to fail
QM_BAD blinking.
Incompatible
Load compatible firmware or replace the AP module
firmware loaded
with one containing a compatible firmware revision
(Section 3.3.2).
2.4.5
If the Problem Still Exists
If none of the corrective actions shown in Table 2–1 solves the problem, try the fol-
lowing additional steps:
1. Reset the NVRAM by placing switch 2 to the ON (down) position and cycl-
ing the ac power off, then back on. This will clear the memory and restore
default parameters for the bridge.
2. Replace all four logic modules in the unit with known good modules. If the
failure disappears, reinsert the modules you’ve just removed, one at a time,
until the problem returns. Then, replace that module with a good module.
