54
Maxim Integrated
Evaluates: DS34S132
DS34S132 Evaluation Kit
Table 5-5. Ethernet Performance Data Descriptions
Figure 5-7. Ethernet Performance Data Menu
Ethernet Performance Data
1. Correct Bytes (RX) 0 Correct Bytes (TX) 0
2. Correct Frames (RX) 0 Correct Frames (TX) 0
3. Pause Packets (RX) 0 Pause Packets (TX) 0
4. FCS Error 0 Single Collision 0
5. Alignment Errors 0 Multiple Collision 0
6. Symbol Errors 0 Deferred Frames 0
7. Excessive Length Ers 0 Underrun 0
8. Jabbers Errors 0 Excessive Collision 0
9. Under size Packets 0 Late Collision 0
10. Classified Packets 0 Carrier Sense 0
11. Checksum Err Packets 0 Sqe Test Errors 0
12. Stray Packets 0
n: next screen, p: previous screen, ESC: previous menu
q: exit, r: manually update, c: reset
d: disable automatically update, e: enable automatically update
PARAMETER
DESCRIPTION
POSSIBLE VALUES
Correct Bytes (RX)
The number of ETH packet octets successfully received (not including
CRC). When a valid connection is established the number increases steadi-
ly.
This counter wraps around to 0 after reaching the maximum value.
32-bit number
Correct Frames (RX)
The number of ETH packets successfully received. When a valid connection
is established the number increases steadily. This counter wraps around to
0 after reaching the maximum value.
32-bit number
Pause Packets (RX)
The number of good ETH pause packets received. A good packet has a
length of 64 to 1518 (1536 if bit 8 is set in the network configuration register)
and has no FCS, alignment, or receive symbol errors.
0–511
FCS Error
Counts the number of packets received that do not pass the FCS check
(RFC 1643). An FCS check is a mathematical way to ensure that all the
frame bits are correct without the system having to examine each bit and
compare it against the original.
Recommendation:
Check for physical prob-
lem such as hardware problem, or a bad line, or noisy environment.
Alignment Errors
The number of packets received that are not an integral number of octets in
length (RFC 1643). All frames should end on an 8-bit boundary, but physical
problems on the network could cause the number of bits to deviate from the
multiple of eight.
Recommendation:
Check physical connections, devices
and configuration.
0–255
Symbol Errors
The number of packets from PHY that had Rx_err during reception.
0–255
Excessive Length Ers
The number of received packets where the length exceeds 1518 bytes, and
without CRC error, alignment error or symbol error.
0–255
Jabbers Error
The number of received packets exceeding 1518 bytes (1536 if bit 8 set in
network configuration register) in length and have either a CRC error, an
alignment error or a receive symbol error.
0–255
Under size Packets
The number of received packets where the length is less than 64 bytes,
without CRC error or alignment error.
0–255