Cisco Catalyst 9500

This exhaustive ASIC memory test is run during normal switch operation. The corresponding switch utilizes
memory built-in self-test for this test. The memory test requires switch reboot after the test.
DescriptionAttribute
Very disruptive.Disruptive or Nondisruptive
Run this on-demand test only if you experience
memory-related problems in the system. Do not run
Recommendation
this test if you do not want to reload the Supervisor
engine that is under test.
Off.Default
Cisco IOS XE Everest 16.6.1.Intitial release
–Corrective action
Supervisors.Hardware support
TestUnusedPortLoopback
This test periodically verifies the data path between the supervisor module and network ports of a module
during runtime to determine if any incoming network interface ports are locked. In this test, a Layer 2 packet
is flooded on to the VLAN associated with the test port and the inband port of the supervisor engine. The
packet loops back into the test port and returns to the supervisor engine on the same VLAN. This test runs
only on unused (admin down, that is, the ports are shut down) network ports irrespective of whether a cable
is connected or not, and completes within a millisecond per port. This test substitutes the lack of a nondisruptive
loopback test in the current ASICs, and runs every 60 seconds.
DescriptionAttribute
Nondisruptive.Disruptive or Nondisruptive
Do not disable. This test is automatically disabled
during CPU usage spikes to maintain accuracy.
Recommendation
On.Default
Cisco IOS XE Fuji 16.9.1.Intitial release
Displays a syslog message indicating that a port has
failed. In modules other than supervisor engines, if
Corrective action
all port groups fail (for example, at least one port per
port ASIC fails more than the failure threshold for all
the port ASICs), the default action is to reset the
module and power down the module after two resets.
Supervisors and linecards.Hardware support
TestPortTxMonitoring
This test periodically monitors data-path traffic in the transmitted direction of each network port that is
physically connected to a device with status as UP. This test is completed within a millisecond per port. It
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
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Configuring Online Diagnostics
Generic Online Diagnostics (GOLD) Tests