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A-12

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

OL-4266-08

Appendix A Online Diagnostic Tests

DFC Layer 2 Forwarding Engine Tests

a packet lookup using the supervisor engine’s 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 Trap feature is verified during the diagnostic packet lookup

by the Layer 2 forwarding engine.

TestBadBpdu

The TestBadBpdu 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 a packet lookup using the supervisor engine’s 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 BPDU feature is verified during the diagnostic packet

lookup by the Layer 2 forwarding engine.

Ta b l e A- 1 8 Te s t Tr a p Te s t A tt r i b u te s

Attribute Description

Disruptive/Nondisruptive

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).

Recommendation This test runs by default during bootup or after a reset or OIR.

Default Off.

Release 12.1(13)E, 12.2(14)SX.

Corrective action None. See the system message guide for more information.

Hardware support DFC-enabled modules.

Ta b l e A-19 TestBadBpdu Test Attributes