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55
Viewing Ordered Sets
This page displays the Ordered Sets that are being transmitted on the switch for each port since
the last time the page was displayed. Ordered Sets are used when communicating data across
networks to indicate actions, events, or status regarding the data. A list of detected Ordered Sets
and their indications is provided below.
To view ordered sets:
1. Click
Advanced Functions > Diagnostics > Ordered Sets
.
The Ordered Sets page appears.
Detection
Indication
End of Frame
(EOF)
An End-of-Frame (EOF) delimiter has been detected; frames are present. (An EOF
immediately follows the CRC of a frame and signals the frame’s end.)
Start of Frame
(SOF)
A Start-of-Frame (SOF) delimiter has been detected; frames are present.
Idle
Sequences of IDLEs are being transmitted to maintain link activity; no other data
is being transmitted.
ARB(FF)
ARB(FF)s are being transmitted to maintain link activity; no other data is being
transmitted.
ARB
A port is arbitrating for network access to perform a task.
Read Ready
(RRDY)
The receiving node on this port has sent an R_RDY signal, indicating that it is
ready for a frame to be transmitted over the link.
Close (CLS)
The port is attempting to begin the process of closing the current FC-AL circuit.
Open (OPN)
The port is attempting to open communications with another port.
Note
: As is the case with some ordered sets, an OPN may not go all the way
around the FC-AL, instead stopping at its destination.
F8 Failure
A non-switching port has detected a failure on its receive input, is notifying other
ports, and is determining whether the network is still operational.
Some events that could cause the port to detect network failure follow:
• A device has failed or has been powered off.
• The physical connection between the transmitter and receiver is broken.
• Activating the port bypass circuit does not typically result in a network failure.
Figure 3-31: Advanced Functions: Ordered Sets page
