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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AR8327-AL1A-R 데이터시트(PDF) 43 Page - List of Unclassifed Manufacturers |
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AR8327-AL1A-R 데이터시트(HTML) 43 Page - List of Unclassifed Manufacturers |
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43 / 394 page  Atheros Communications, Inc. AR8327/AR8327N Seven-port Gigabit Ethernet Switch • 43 2.12 MIB/Statistics Counters The statistics counter block maintains a set of forty MIB counters per port. These counters provide a set of Ethernet statistics for frames received on ingress and transmitted on egress. A register interface allows the CPU to capture, read, or clear the counter values. The counters support: n RMON MIB n Ethernet-like MIB n MIB II n Bridge MIB n RFC2819 The CPU interface supports: n Autocast MIB counters after half-full n Autocast MIB counters after time out n Autocast MIB counters when requested n Clearing all MIB counters Table 2-30 describes the statistics counter for each port. Table 2-29. Application Cases 1 and 2 Member Application Case 1 Application Case 2 Ports Description Ports Description Ports Each port configured in 802.1Q secure mode Each port configured in 802.1Q secure mode Ports Create For Ports Create For VLAN1 Port 0, 1, 2 Create for LAN A Ports 0, 1, 2 LAN A VLAN2 Ports 0, 3, 4 Create for LAN B Ports 0, 3, 4 LAN B VLAN3 Ports 0, 5 Create for WAN — — Table 2-30. MIB Counters Counter Width Offset Description RxBroad 32bit 0x00 The number of good broadcast frames received RxPause 32bit 0x04 The number of PAUSE frames received RxMulti 32bit 0x08 The number of good multicast frames received RxFcsErr 32bit 0x0c The total number of frames received with a valid length, but an invalid FCS and an integral number of octets RxAllignErr 32bit 0x10 The total number of frames received with a valid length that do not have an integral number of octets and an invalid FCS RxUndersize 32bit 0x14 The number of frames received that are less than 64 bytes long and have a good FCS RxFragment 32bit 0x18 The number of frames received that are less than 64 bytes long and have a bad FCS Rx64Byte 32bit 0x1C The number of frames received that are exactly 64 bytes long including those with errors Rx128Byte 32bit 0x20 The number of frames received whose length is between 65 and 127 bytes, including those with errors Rx256Byte 32bit 0x24 The number of The number of frames received whose length is between 128and 255 bytes, including those with errors Rx512Byte 32bit 0x28 The number of frames received whose length is between 256 and 511 bytes, including those with errors |
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