OpenVMS Cluster Systems - OpenVMS Systems - HP

Troubleshooting the NISCA Protocol
F.3 Using SDA to Monitor LAN Communications
F.3 Using SDA to Monitor LAN Communications
This section describes how to use SDA to monitor LAN communications.
F.3.1 Isolating Problem Areas
If your system shows symptoms of intermittent failures during run time, you
need to determine whether there is a network problem or whether the symptoms
are caused by some other activity in the system.
Generally, you can diagnose problems in the NISCA protocol or the network using
the OpenVMS System Dump Analyzer utility (SDA). SDA is an effective tool for
isolating problems on specific nodes running in the OpenVMS Cluster system.
Reference: The following sections describe the use of some SDA commands
and qualifiers. You should also refer to the OpenVMS Alpha System Analysis
Tools Manual or the OpenVMS VAX System Dump Analyzer Utility Manual for
complete information about SDA for your system.
F.3.2 SDA Command SHOW PORT
The SDA command SHOW PORT provides relevant information that is useful in
troubleshooting PEDRIVER and LAN adapters in particular. Begin by entering
the SHOW PORT command, which causes SDA to define cluster symbols.
Example F–1 illustrates how the SHOW PORT command provides a summary of
OpenVMS Cluster data structures.
Troubleshooting the NISCA Protocol F–9