Allied Telesis AT-2973SX, AT-2973T/4 manual Vpd, Group D Ethernet Traffic Tests

Chapter 12: User Diagnostics

Table 9. Diagnostic Tests (Continued)

	Test	Description
Number	Name
C8	DMA Engine	Verifies the functionality of the DMA engine
		block by performing numerous DMA read and
		write operations to various system and
		internal memory locations (and byte
		boundaries) with varying lengths (from 1 byte
		to over 4 KB, crossing the physical page
		boundary) and different data patterns
		(incremental, fixed, and random). CRC checks
		are performed to ensure data integrity. The
		DMA write test also verifies that DMA writes
		do not corrupt the neighboring host memory.
C9	VPD	Exercises the Vital Product Data (VPD)
		interface using PCI configuration cycles. You
		must program a proper bootcode into the non-
		volatile memory. If no VPD data is present
		(that is, the VPD NVM area is all 0s), the test
		first initializes the VPD data area with non-
		zero data before starting the test and restores
		the original data after the test completes.
C11	FIO Events	Verifies that the event bits in the CPU's Fast
		IO (FIO) interface are triggering correctly
		when a particular chip events occur, such as a
		VPD request initiated by the host, an
		expansion ROM request initiated by the host,
		a timer event generated internally, toggling
		any GPIO bits, or accessing NVM.
	Group D: Ethernet Traffic Tests
D1	MAC Loopback	Enables MAC loopback mode in the adapter
		and transmits 5000 Layer 2 packets of various
		sizes. As the packets are received by
		Broadcom NetXtreme II User Diagnostics,
		they are checked for errors. Packets are
		returned through the MAC receive path and
		never reach the PHY. The adapter should not
		be connected to a network.

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