IBM Power Systems 775 Manual page 79

1.9.1 Integrated Switch Network Manager
The ISNM subsystem package is installed on the executive management server of a
high-performance computing cluster that consists of IBM Power 775 Supercomputers and
contains the network management commands. The local network management controller
runs on the server service processor as part of the system of the drawers and is shipped with
the Power 775.
Network management services
As shown in Figure 1-51 on page 66, the ISNM provides the following services:
ISR network configuration and installation:
– Topology validation
– Miswire detection
– Works with cluster configuration as defined in the cluster database
– Hardware global counter configuration
– Phased installation and Optical Link Connectivity Test (OLCT)
ISR network hardware status:
– Monitors for ISR, HFI, link, and optical module events
– Command line queries to display network hardware status
– Performance counter collection
– Some RMC monitor points (for example, HFI Down)
Network maintenance:
– Set up ISR route tables during drawer power-on
– Thresholds on certain link events, might disable a link
– Dynamically update route tables to reroute around problems or add to routes when
CECs power on
– Maintain data to support software route mode choices, makes the data available to the
OS through PHYP
– Monitor global counter health
Report hardware failures:
– Analyzes the EMS
– Most events that are forwarded to TEAL Event DB and Alert DB
– Link events due to CEC power off/power on are consolidated within CNM to reduce
unnecessary strain on analysis
– Events reported via TEAL to Service Focal Point™ on the HMC
Chapter 1. Understanding the IBM Power Systems 775 Cluster
65