Broadcom NetXtreme II User Manual page 234

NetXtreme II
Test
Number Name
D4 LSO
D5 EMAC Statistics
D6 RPC
Page 234 Diagnostic Test Descriptions
Table 3: Diagnostic Tests (Cont.)
Description
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.
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.
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.
Bro adco m C orp or atio n
User Guide
January 2010
Document ENGSRVT52-CDUM100-R