Understanding The System Health Checker-Blackdiamond 8800 Family Of Switches Only; Enabling And Disabling Backplane Diagnostic Packets On The Switch - Extreme Networks ExtremeWare XOS Guide Manual

Status Monitoring and Statistics
Backplane diagnostic packets are disabled by default. If you enable this feature, the system health
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checker tests the packet path for a specific I/O module every 6 seconds by default. The MSM sends
and receives diagnostic packets from the I/O module to determine the state and connectivity. (The
other I/O modules with backplane diagnostic packets disabled continue polling every 60 seconds by
default.)
System health check errors are reported to the syslog. If you see an error, please contact Extreme
Networks Technical Support.
Understanding the System Health Checker—BlackDiamond 8800
Family of Switches Only
On the BlackDiamond 8800 family of switches, the system health checker tests the backplane, the CPUs
on the MSM modules, the I/O modules, the processes running on the switch, and the power supply
controllers by periodically forwarding packets and checking for the validity of the forwarded packets.
Two modes of health checking are available: polling (also known as control plane health checking) and
backplane diagnostic packets (also known as data plane health checking). These methods are briefly
described in the following:
Polling is always enabled on the system and occurs every 5 seconds by default. The polling value is
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not a user-configured parameter. The system health check polls the control plane health between
MSMs and I/O modules, monitors memory levels on the I/O module, monitors the health of the
I/O module, and checks the health of applications and processes running on the I/O module. If the
system health checker detects an error, the health checker notifies the MSM.
Backplane diagnostic packets are disabled by default. If you enable this feature, the system health
●
checker tests the data link for a specific I/O module every 5 seconds by default. The MSM sends and
receives diagnostic packets from the I/O module to determine the state and connectivity. If you
disable backplane diagnostics, the system health checker stops sending backplane diagnostic packets.
System health check errors are reported to the syslog. If you see an error, please contact Extreme
Networks Technical Support.
Enabling and Disabling Backplane Diagnostic Packets on the
Switch
To enable backplane diagnostic packets, use the following command:
enable sys-health-check slot <slot>
BlackDiamond 10K switch—By default, the system health checker tests the packet path every 6
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seconds for the specified slot.
BlackDiamond 8800 family of switches—By default, the system health checker tests the data link
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every 5 seconds for the specified slot.
NOTE
Enabling backplane diagnostic packets increases CPU utilization and competes with network traffic for resources.
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ExtremeWare XOS 11.3 Concepts Guide