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Chapter 3 Diagnostics
Status and Activity Indicators
Front Panel LED Port Indicators
The color and flash speed of each port's LED, as described in Table 3-2, indicates the
individual port's status.
Table 3-2
F
RONT
No light showing
Steady yellow
Slow* yellow
Fast* yellow
Steady green
Slow green
Fast green
Flickering green
* Slow -- 2 second interval, Fast - 1/2 second interval
Each switch port includes an LED indicator. A port with no GBIC installed that if
functioning properly will have no light showing on the LED. If a problem has been
detected with the port, the LED indicators above will provide some indication of the type
of problem. Faults and problems are depicted with a yellow port indicator.
When a GBIC is installed and a cable is connected to a properly functioning Fibre
Channel device, the LED indicator will be steady green. If a slow green flash is observed
it indicates the port is seeing light but cannot make a proper fabric connection. This could
indicate a loopback cable is installed, the fabric is segmented (a E port connection to
another switch cannot be completed and the switches cannot form a fabric), or the
SilkWorm has been connected to an incompatible switch.
When frame traffic is being transferred on a port, the LED flickers fast green showing
the port is active and transferring data.
3-4
Front Panel LED Status Indicators
P
LED
D
ANEL
S
EFINITION
No light or signal carrier (no module, no cable) for media interface
LEDs
Receiving light or signal carrier, but not yet online
Disabled (result of diagnostics or portDisable command). Flashes
every 2 seconds.
Error, fault with port. Flashes every 1/2 second.
Online (connected with device over cable)
Online, but segmented (loopback cable or incompatible switch) flash
every 2 seconds.
Internal loopback (diagnostic). Flashes every 1/2 second.
Online and frames flowing through port.
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