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| 型号： | GT-48004A |
| 厂商： | Galileo Technology Services, LLC |
| 英文描述： | Four Port Switched Fast Ethernet Controller(四端口、交换式快速以太网控制器) |
| 中文描述： | 四端口交换式快速以太网控制器（四端口，交换式快速以太网控制器） |
| 文件页数： | 64/106页 |
| 文件大小： | 953K |
| 代理商： | GT-48004A |
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GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
60
15.
Network Management Support
The GT-48004A supports the following management features:
HP-EASE packet sampling technology
Repeater MIB and PCI counters
Port monitoring (sniffer) mode
This section describes the MIB counter, connectivity matrix and port mirroring functions. The HP-EASE functions are
described in the following section.
15.1
Repeater MIB and PCI Counters
The GT-48004A incorporates a full set of Repeater MIB counters for each Ethernet port, as well as counters for activity
on the PCI interface. Counters are accessed by the management CPU through the PCI interface.
The Repeater MIB counters include the following:
Bytes Received
Bytes Sent
Frames Received
Frames Sent
Total Bytes Received (Good and Bad)
Total Frames Received (Good and Bad)
Multicast Frames Received
Broadcast Frames Received
CRC + Alignment Error
Oversize Frames
Fragments
Jabber Frames
Collision
Late Collision
Frames with length of 64 Bytes
Frames with length of between 65-127 Bytes
Frames with length of between 128-255 Bytes
Frames with length of between 256-511 Bytes
Frames with length of between 512-1023 Bytes
Frames with length of between 1024-1522 Bytes
MAC Receive Error (received packets with RxEr asserted)
Dropped Frames
The global PCI counters are:
PCI Frames Received
PCI Frames Sent
Please see the register description section below for more information on the repeater MIB registers.
15.2
Monitoring (Sniffer) Mode
The CPU can program the GT-48004A to work in Monitoring mode for one of the two Fast Ethernet ports. In Monitoring
mode, the GT-48004A sends all receive (including local traffic) and transmit packets to the CPU or to a port in one of
the GT-48004A devices which was assigned to be the Sniffer. The packets that are forwarded to the Sniffer are not
necessarily in a linear time order.
Monitoring Mode is enabled by setting bit 2 in the Port Control register. The target sniffer is written into the CPU and
Sniffer Numbers register. Only one port of a single GT-48004A device can work in monitoring mode at a time.
15.3
Spanning Tree Support
The GT-48004A provides the hardware assistance for Bridge Spanning Tree Algorithm implementation. The Spanning
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