BlackDiamond 8800 and BlackDiamond X8 Series Switches Only

On BlackDiamond 8800 and BlackDiamond X8 series switches, the system health checker tests the backplane, the CPUs on the MSM/MM 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 not a user-configured parameter. The system health checker polls the control plane health between MSM/MMs 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, you will be notified through the switch log.

    Here is an example from a BDX8:

    <Noti:HAL.SM.ChanDsbl> MM-A: Switch fabric channel 0 provided by Fabric slot FM-1 has been disabled due to failed connection with Slot-1

    If you find errors, refer to Contacting Extreme Networks Technical Support.

  • 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/MM 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.

    To see any results, you need to monitor the log to see if there are any errors detected when the backplane diagnostic packets system health checker is enabled.

    No log messages generated means no errors found.

    Here is an example of an error found on BDX8:

    <Warn:HAL.Sys.Warning> MM-A: Sys-Health-Check DataPath FM : slot/unit/port/modid F1-> 1/0->0/ 1-> 0/36-> 4 rc=3

    If you find errors, refer to Contacting Extreme Networks Technical Support.

For more information about enabling and configuring backplane diagnostics, see the following sections:

System health check errors are reported to the syslog. If you see an error, contact support (see to Contacting Extreme Networks Technical Support).