Functional Description
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• Had a length of 64 to rx_maxlen bytes inclusive
• Had no CRC error, alignment error or code error.
See the Rx Align/Code Errors and Rx CRC errors statistic descriptions for definitions of alignment, code
and CRC errors. Overruns have no effect upon this statistic.
14.3.2.20.1.3 Multicast Rx Frames (Offset = 8h)
The total number of good multicast frames received on the port. A good multicast frame is defined to be:
• Any data or MAC control frame which was destined for any multicast address other than
0xFFFFFFFFFFFF
• Had a length of 64 to rx_maxlen bytes inclusive
• Had no CRC error, alignment error or code error
See the Rx Align/Code Errors and Rx CRC errors statistic descriptions for definitions of alignment, code
and CRC errors. Overruns have no effect upon this statistic.
14.3.2.20.1.4 Pause Rx Frames (Offset = Ch)
The total number of IEEE 802.3X pause frames received by the port (whether acted upon or not). Such a
frame:
• Contained any unicast, broadcast, or multicast address
• Contained the length/type field value 88.08 (hex) and the opcode 0x0001
• Was of length 64 to rx_maxlen bytes inclusive
• Had no CRC error, alignment error or code error
• Pause-frames had been enabled on the port (tx_flow_en = 1).
The port could have been in either half or full-duplex mode.
See the Rx Align/Code Errors and Rx CRC errors statistic descriptions for definitions of alignment, code
and CRC errors. Overruns have no effect upon this statistic.
14.3.2.20.1.5 Rx CRC Errors (Offset = 10h)
The total number of frames received on the port that experienced a CRC error. Such a frame:
• Was any data or MAC control frame which matched a unicast, broadcast or multicast address, or
matched due to promiscuous mode
• Was of length 64 to rx_maxlen bytes inclusive
• Had no code/align error,
• Had a CRC error
Overruns have no effect upon this statistic.
A CRC error is defined to be:
• A frame containing an even number of nibbles
• Failing the Frame Check Sequence test
14.3.2.20.1.6 Rx Align/Code Errors (Offset = 14h)
The total number of frames received on the port that experienced an alignment error or code error. Such a
frame:
• Was any data or MAC control frame which matched a unicast, broadcast or multicast address, or
matched due to promiscuous mode
• Was of length 64 to rx_maxlen bytes inclusive
• Had either an alignment error or a code error
Overruns have no effect upon this statistic.
1212
Ethernet Subsystem SPRUH73H–October 2011–Revised April 2013
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