Cisco 7604 Configuration Manual page 953

Appendix A Online Diagnostic Tests
modules, the diagnostic packet is sent from the supervisor engine's inband port through the switch fabric
and looped back from one of the DFC ports. The Index Learn feature is verified during the diagnostic
packet lookup by the Layer 2 forwarding engine.
Table A-16
Attribute
Disruptive/Nondisruptive
Recommendation
Default
Release
Corrective action
Hardware support
TestConditionalLearn
The TestConditionalLearn test verifies the ability to learn a Layer 2 source MAC address under specific
conditions. When running the test on the supervisor engine, the diagnostic packet is sent from the
supervisor engine's inband port and performs a packet lookup using the supervisor engine Layer 2
forwarding engine. For DFC-enabled modules, the diagnostic packet is sent from the supervisor engine's
inband port through the switch fabric and looped back from one of the DFC ports. The Conditional Learn
feature is verified during the diagnostic packet lookup by the Layer 2 forwarding engine.
Table A-17
Attribute
Disruptive/Nondisruptive
Recommendation
Default
Release
Corrective action
Hardware support
TestTrap
The TestTrap test verifies the ability to trap or redirect packets to the switch processor. This test verifies
that the Trap feature of the Layer 2 forwarding engine is working properly. When running the test on the
supervisor engine, the diagnostic packet is sent from the supervisor engine's inband port and performs
OL-4266-08
TestIndexLearn Test Attributes
Description
Disruptive for looped-back ports. Disruption is typically less
than one second. Duration of the disruption depends on the
configuration of the looped-back port (for example, Spanning
Tree Protocol).
This test runs by default during bootup or after a reset or OIR.
Off.
12.1(13)E, 12.2(14)SX.
None. See the system message guide for more information.
DFC-enabled modules.
TestConditionalLearn Test Attributes
Description
Disruptive for looped back ports. Disruption is typically less
than one second. Duration of the disruption depends on the
configuration of the looped-back port (for example, Spanning
Tree Protocol).
This test runs by default during bootup or after a reset or OIR.
Off.
12.1(13)E, 12.2(14)SX.
None. See the system message guide for more information.
DFC-enabled modules.
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
DFC Layer 2 Forwarding Engine Tests
A-11