ServerNet Cluster 6780 Operations Guide (G06.28+, H06.05+)

Contents
ServerNet Cluster 6780 Operations Guide—525606-003
iii
3. Troubleshooting and Replacement
Procedures (continued)
3. Troubleshooting and Replacement Procedures (continued)
Troubleshooting Expand-Over-ServerNet Line-Handler Processes and
Lines 3-16
Checking Communications With a Remote Node 3-18
Methods for Repairing ServerNet Connectivity Problems 3-18
Checking the Internal ServerNet X and Y Fabrics 3-20
Checking the External ServerNet X and Y Fabrics 3-23
Using the Internal Loopback Test Action 3-24
Using SCF to Check Processor-to-Processor Connections 3-25
Finding ServerNet Cluster Event Messages in the Event Log 3-25
MSEB LEDs 3-26
LEDs on the 6780 Switch 3-27
Logic Board Display on the 6780 Switch 3-28
Replacement Procedures 3-30
Replacing an MSEB 3-30
Replacing a PIC in an MSEB 3-30
Replacing a Fiber-Optic Cable Between an MSEB and a Switch-to-Node
Port 3-31
Replacing a Fiber-Optic Cable Between Cluster Switches 3-31
Replacing a 6780 Switch 3-32
Replacing a CRU in a 6780 Switch 3-33
Diagnosing Performance Problems 3-35
4. SCF Commands for SNETMON and the ServerNet Cluster
Subsystem
SCF Objects for ServerNet Cluster 4-2
Sensitive and Nonsensitive Commands
4-2
Summary States for the SCL SUBSYS Object
4-2
STARTSTATE Attribute for the ServerNet Cluster Subsystem 4-4
ALTER SUBSYS Command 4-5
Considerations 4-6
Example 4-6
INFO Command 4-7
Example 4-7
PRIMARY Command 4-9
Consideration 4-9
Example 4-10