NetXtreme II User Guide
January 2010
Broadcom Corporation
Page 234 Diagnostic Test Descriptions Document ENGSRVT52-CDUM100-R
D4 LSO Verifies the functionality of the adapter’s Large Send Offload (LSO) support by
enabling MAC loopback mode and transmitting large TCP packets. As the
packets are received back by Broadcom NetXtreme II User Diagnostics, they are
checked for proper segmentation (according to the selected MSS size) and any
other errors. The adapter should not be connected to a network.
D5 EMAC Statistics Verifies that the basic statistics information maintained by the chip is correct by
enabling MAC loopback mode and sending Layer 2 packets of various sizes.
The adapter should not be connected to a network.
D6 RPC Verifies the Receive Path Catch-up (RPC) block by sending packets to different
transmit chains. The packets traverse the RPC logic (though not the entire MAC
block) and return to the receive buffers as received packets. This is another
loopback path that is used by Layer 4 and Layer 5 traffic within the MAC block.
As packets are received back by Broadcom NetXtreme II User Diagnostics, they
are checked for errors. The adapter should not be connected to a network.
Table 3: Diagnostic Tests (Cont.)
Test
Description
Number Name
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