NonStop NS-Series Operations Guide (H06.12+)

15 <- DOWN
Y-FABRIC
TO 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
FROM
00 UP UP UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA
01 UP UP UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA UNA
02 <- DOWN
03 <- DOWN
04 <- DOWN
05 <- DOWN
06 <- DOWN
07 <- DOWN
08 <- DOWN
09 <- DOWN
10 <- DOWN
11 <- DOWN
12 <- DOWN
13 <- DOWN
14 <- DOWN
15 <- DOWN
In the preceding example of a 2-processor system:
• All ServerNet connections between processors 0 and 1 are up.
• Processors 2 through 15 do not exist on this system. As a result:
— The status from processors 0 and 1 to processors 2 through 15 is displayed as unavailable
(UNA) in both fabrics.
— The status from processors 2 through 15 is displayed as down.
Normal ServerNet Fabric States
Normal states for a path on the ServerNet fabrics can be one of:
• UP
The path from the processor in the FROM row to the processor in the TO column is up. The
status for all ServerNet connections between existing processors in a system should be UP.
• <-DOWN (for an entire row)
The processor in the FROM row is down or nonexistent. If the processor in the FROM row
does not exist on your system, this status is normal. Otherwise, refer to “Identifying ServerNet
Fabric Problems” (page 94).
• UNA (unavailable)
The processor in the TO column is down or nonexistent. Therefore, the path from the
processor in the FROM row to the processor in the TO column is down. If the processor in
the TO column does not exist on your system, this status is normal. Otherwise, refer to
“Identifying ServerNet Fabric Problems” (page 94).
Identifying ServerNet Fabric Problems
Depending on how your system is configured, these states for a path on the ServerNet fabrics
might indicate a problem:
• DIS (disabled)
The ServerNet fabric is down at the TO location. As a result, the path from the processor in
the FROM row to the processor in the TO column is down for receiving; that is, the processor
in the TO column cannot receive from any other processor or from I/O devices. DIS overrides
both UP and DN.
• DN (down)
94 ServerNet Resources: Monitoring and Recovery