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| 型號(hào)： | LXT9860AHC |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項(xiàng)-數(shù)據(jù)表參考 |
| 文件頁數(shù)： | 81/96頁 |
| 文件大小： | 1309K |
| 代理商： | LXT9860AHC |
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LXT980/980A Dual-Speed, 5-Port Fast Ethernet Repeater
Datasheet
81
5.1.2
RMON Counter Registers
The interface counter descriptions in
Table 52
are intended to be illustrative. For the exact
definition of these counters, refer to the RMON MIB, RFC 1757. All counters count events, octets
or packets that were received from the interface. Packet length never includes preamble or framing
bits (start of frame, end of frame, dribble bits, etc.).
rptrMonitorPortIsolates - Port 1
050
Counts the number of times a port auto isolates. NOTE:
When these counters increment, none of the other port
counters will increment since the frame never had a valid
start.
rptrMonitorPortIsolates - Port 2
051
rptrMonitorPortIsolates - Port 3
052
rptrMonitorPortIsolates - Port 4
053
rptrMonitorPortIsolates - Port 5
054
rptrMonitorSymbolErrorDuringPacket - Port 1
055
Counts the number of time a packet contained symbol errors.
Only one symbol error is counted per packet.
rptrMonitorSymbolErrorDuringPacket - Port 2
056
rptrMonitorSymbolErrorDuringPacket - Port 3
057
rptrMonitorSymbolErrorDuringPacket - Port 4
058
Table 51. Port Counter Registers (Continued)
Name
Offset
Addr
1
Description
1. Replace
“
X
”
in address with specific port to be addressed (offsets 0 through 4 correspond to Ports 1 through 5).
2. For 100M: the
“
Short Events
”
register counts events < 88 bit times; the
“
Port Runts
”
register counts events > 92. A 4-bit-time
differential exists because 100M operates with nibble boundaries, so data packets < 4 bits are counted as 4.
Table 52. RMON Counter Registers
Name
Type
Addr
Description
etherStatsOctets
R/W
05C,
05D
Number of data octets including those in bad packets and octets in
FCS fields, but does not include preamble or other framing bits.
etherStatsPkts
R/W
05E
Number of packets received (from network), including errored packets.
etherStatsBroadcastPkts
R/W
05F
Number of good broadcast packets received. Counter is not cleared
by ZeroCount bit.
etherStatsMulticastPkts
R/W
060
Number of good multicast packets received.
etherStatsCRCAlignErrors
R/W
061
Number of valid-length packets (64 to 1518 bytes inclusive) that had a
bad Frame Check Sequence (FCS).
etherStatsUndersizePkts
R/W
062
Number of well-formed packets that were smaller than 64 octets.
etherStatsOversizePkts
R/W
063
LXT980:
Number of well-formed packets that were longer than 1518
octets.
LXT980A:
Number of well-formed packets that were longer than 1518
octets and smaller than 2044.
etherStatsFragments
R/W
064
Number of ill-formed packets less than 64 octets. Note: Any event
without a start-of-frame delimiter (0-octet packet) will be counted as a
fragment, no matter how long it is.
etherStatsJabbers
R/W
065
LXT980:
Number of ill-formed packets longer than 1518 octets. An ill-
formed packet is one with an FCS error.
LXT980A:
Number of ill-formed packets longer than 1518 octets, and
number of packets (good and bad) greater than/equal to 2044. An ill-
formed packet is one with an FCS error.
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