This PHY loopback test verifies the PHY-level loopback functionality. In this test, a packet, which loops back
at the PHY level and is matched against the stored packet, is sent. It cannot be run as a health-monitoring test.
DescriptionAttribute
Disruptive.Disruptive or Nondisruptive
If the link to the external connector is down, run this
on-demand test to check the health of the link.
Recommendation
Off.Default
Cisco IOS XE Everest 16.6.1.Intitial release
–Corrective action
Supervisors and linecards.Hardware support
TestThermal
This test verifies temperature reading from a device sensor.
DescriptionAttribute
NondisruptiveDisruptive or Nondisruptive
Do not disable. Run this as an on-demand test, and as
a health-monitoring test if the administrator is down.
Recommendation
On.Default
Cisco IOS XE Everest 16.6.1.Intitial release
–Corrective action
Supervisors and linecards.Hardware support
TestScratchRegister
This Scratch Register test monitors the health of ASICs by writing values into registers and reading back the
values from these registers.
DescriptionAttribute
Nondisruptive.Disruptive or Nondisruptive
Do not disable. Run this test if the task of writing
values to the registers fails. This can be run as a
health-monitoring test and also as an on-demand test.
Recommendation
On.Default
Cisco IOS XE Everest 16.6.1.Intitial release
–Corrective action
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
273
Configuring Online Diagnostics
Generic Online Diagnostics (GOLD) Tests