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| 型號： | 9860 |
| 廠商： | Intel Corp. |
| 英文描述： | Advanced 10/100 Repeater with Intergrated Management |
| 中文描述： | 高級10/100中繼器與綜合管理 |
| 文件頁數(shù)： | 96/118頁 |
| 文件大?。?/td> | 1648K |
| 代理商： | 9860 |
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LXT9860/9880
—
Advanced 10/100 Repeater with Integrated Management
96
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
6.2.2
RMON Counter Registers
The interface counter descriptions in
Table 47
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.).
rptrMonitorPortFramesTooLong
0X5
Counts packets that had a length greater than 1518
octets.
rptrMonitorPortShortEvents
0X6
Counts events <
‘
ShortEventMax
’
.
10 Mbps:
74-82 bit times.
100 Mbps:
74-84 bit times.
rptrMonitorPortRunts
0X7
Counts events >
‘
ShortEventMax
’
, but <512 bits.
See Note 4.
rptrMonitorPortCollisions
0X8
Counts the number of collisions that occurred, not
including late collisions.
rptrMonitorPortLateEvents
0X9
Counts the number of times a collision is detected after
the
‘
LateEventThreshold
’
time (480-565 bits). This event
is counted here and also in the
‘
collisions
’
attribute.
rptrMonitorPortVeryLongEvents
0XA
Counts the number of times the transmitter is active for
greater than the MJLP time.
rptrMonitorPortDataRateMismatches
0XB
Counts the number of times the frequency or data rate
of the incoming signal is detectably different from that of
the local transmit frequency.
rptrMonitorPortAutoPartitions
0XC
Counts the number of times this port has been
partitioned from the network.
rptrTrackSourceAddrChanges
0XD
Counts the number of times the source address has
changed.
rptrMonitorPortBroadcastPkts
0XE
Counts the number of good broadcast packets received
by this port.
rptrMonitorPortMulticastPkts
0XF
Counts the number of good multicast packets received
by this port.
rptrMonitorPortIsolates
0A0
–
0A7
5
Counts the number of times a port auto isolates. NOTE:
When these counters increment, none of the other port
counters increment, since the frame never had a valid
start.
rptrMonitorSymbolErrorDuringPacket
0AA-0B1
6
Counts the number of time a packet contained symbol
errors. Only one symbol error is counted per packet. On
the MII ports this counter is invalid.
Table 46. Port Counter Registers (Continued)
Name
Offset
Addr
1,2
Description
1. All offset addresses are expressed in hex.
2. Replace
“
X
”
in address with specific port to be addressed (offsets 0 through 9 correspond to Ports 1
through 10).
3. The ReadableFrame counter max size threshold can either be 1518 or 1522. All counters expecting a MTU
size of 1518 can be changed to a new value of 1522 by setting the Extended Frame bit (13) in the
Repeater Configuration Register.
4. For 100 Mbps: the
“
Short Events
”
register counts events < 88 bit times; the
“
Port Runts
”
register counts
events > 92. A 4-bit-time differential exists because 100 Mbps operates with nibble boundaries, so data
packets < 4 bits are counted as 4.
5. A0 - A7 corresponds to Port 1 - Port 8.
6. AA - B1 corresponds to Port 1 - Port 8.
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