IBM 3745 Problem Determination Manual page 331

Token-Ring Problems
Field
fD
OPEN:
CLOSED:
FROZEN:
DISABLED:
(blank):
The TIC has been inserted into the tOken-ring and is in. normal
operation. Open parameters have been passed, and receive
and transmit operations have been started.
The TIC has been opened since initialization, but has since
been closed (by the host).
An error was detected by NCP and the foHowing actions were
taken by NCP:
• Interrupts from this TIC are disabled.
• DMA from this TIC is disabled.
• The TIC is reset.
The associated TRA has been disconnected by MOSS. NCP
will send no Pia to this TIC.
There is no TIC mode if NCP is not online.
The TIC mode is derived from NCP MAC layer status obtained from NCP. The
following table gives the correspondence:
Table 12-4. TIC Mode and MAC Status
Medium Access Control (MAC) Status TIC Mode
Idle
Idle
TIC resetting hard Idle
TIC resetting soft
Idle
Initialization list transfer Reset
Initialized Initialized
-
Open started Initialized
Receive initialization Initialized
Transmit initialization Initialized
Started Open
Transmit in progress Open
Close in progress Open
Closed Closed
Frozen Frozen
Disconnected Disabled
NCP TRS NOT AVAILABLE
Indicates that:
• At the IPL of NCP, the TRSS was not available and did not pass necessary
TRSS information to MOSS, or
• An error has occurred when trying to access NCP control blocks needed by
the TRSS services.
Several functions which depend upon NCP will not be available.
Otherwise, the
III
field is blank.
12-10
IBM 3745 Communication Controller: Problem Determination Guide
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