參數(shù)資料
型號(hào)： LXT9880AGE
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)： 29/96頁
文件大?。?/td> 1309K
代理商： LXT9880AGE
LXT980/980A Dual-Speed, 5-Port Fast Ethernet Repeater
Datasheet
29
Un-partition. The LXT980 supports two un-partition algorithms. The default algorithm, which
complies with the IEEE 802.3 specification, un-partitions a port when data can be either
received or transmitted from the port for 450-560 bit times without a collision on that port.
The LXT980 also provides an alternate un-partition algorithm, which is available through the
management interface. The alternate algorithm will un-partition a port only when data can be
transmitted to the port for 450-560 bit times without a collision on that port.
Jabber. The LXT980 will assert a minimum-IFG idle period when any port remains actively
transmitting for longer than 40,000 to 75,000 bit times.
2.1.5
Management Support
2.1.5.1
Configuration and Status
The LXT980 provides management control and visibility of the following functions:
Reset and Zeroing of counters
Auto-negotiation (Control, Status, Advertisement, Link Partner)
Device and Board Configuration
LED Functions
Source Address Tracking (per port)
Source Address Matching (per chip)
Device/Revision ID
2.1.5.2
SNMP and RMON Support
The LXT980 provides SNMP and RMON support through its statistics gathering function.
Statistics are gathered on all data that flow through the device for each of the ports, including the
MII. The LXT980 also maintains statistics for either the entire 10 or 100 Mbps repeater, depending
on the speed setting of the MII port. (Two LXT980s are required to maintain statistics on both
repeaters. Since cascaded LXT980s operate as a single logical 10/100 repeater, any device in the
cascade maintains the same 10 or 100 repeater statistics as any other device). All statistics are
stored as 32- or 64-bit quantities. Per-port counters include:
2.1.5.3
Source Address Management
The LXT980 provides two source address management functions for all ports: source address
tracking and source address matching. These functions allow a network manager to track source
addresses at each port, or to identify any port that sourced a particular source address.
Readable Frames
Readable Octets
FCS Errors
Alignment Errors
FramesTooLong
ShortEvents
Runts
Collisions
LateEvents
VeryLongEvents
DataRateMismatch
AutoPartitions
Broadcast
Multicast
SA Changes
Isolates
Symbol Errors
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