Example Local Statistics

The following output was recovered from a single-attached station using the command shown. A temporary fault condition was simulated by disconnecting the FDDI cable from the SunFDDI card and then reconnecting it.

# <basedir>/pf_stat pf0 1 20
Ring	ECM	RMT	PCMS	Ring_OP	XmitP	RecvP
UP	IN	RING_OP	ACTIVE	2	26	1d
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
DOWN	IN	ISOLATED	CONNECT	0	1	1
DOWN	IN	ISOLATED	CONNECT	0	0	0
DOWN	IN	ISOLATED	NEXT	0	0	0
UP	IN	RING_OP	ACTIVE	1	0	0
UP	IN	RING_OP	ACTIVE	0	1	1

Ring	ECM	RMT	PCMS	Ring_OP	XmitP	RecvP
UP	IN	RING_OP	ACTIVE	3	29	20
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	1	1
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	0	0
UP	IN	RING_OP	ACTIVE	0	1	1

Note the following observations regarding this example:

• Accumulated statistics are displayed automatically after every tenth interrogation.

• The combination of Ring=DOWN and RMT=ISOLATED indicate that the station is disconnected from the network.

• The minimum interval of one second is not fast enough to recover and display the complete sequence of PCM states during the path re-establishment phase.

• A Ring_OP signal is received when the path is re-established indicating that the ring is operational.

The link status indicator mounted on the SunFDDI card displays the following sequence of events:

Green (connected) -> Amber (disconnected) --> Green (connected)