參數(shù)資料
型號(hào)： GT-48004A
廠商： Galileo Technology Services, LLC
英文描述： Four Port Switched Fast Ethernet Controller(四端口、交換式快速以太網(wǎng)控制器)
中文描述： 四端口交換式快速以太網(wǎng)控制器（四端口，交換式快速以太網(wǎng)控制器）
文件頁(yè)數(shù)： 66/106頁(yè)
文件大?。?/td> 953K
代理商： GT-48004A
GT-48004A Four Port Switched Fast Ethernet Controller
N:\Marketing\Docs\Archive\48004A\DATASHEET\Rev 1.0\484ads10.fm
Revision 1.0
62
16.
HP-EASE Packet Sampling Technology
Hewlett-Packard’s Embedded Advanced Sampling Environment (HP-EASE) is supported directly by custom hardware
in the GT-48004A device. HP-EASE provides many of the management functions that RMON provides, but at a greatly
reduced implementation cost. With the GT-48004A device, the switch OEM has the freedom to implement RMON,
sampled RMON, EASE, or any of the above.
The HP-EASE functionality is best understood using the familiar stack model, as shown in Figure 15. An HP-EASE
agent running on the management CPU, combines samples of packets passing through the switch, with snapshots of
the MIB counters and forwards these to a management console through SNMP “trap” messages. This approach is dif-
ferent from RMON, as RMON keeps all data within the switch until polled by the management console. The GT-
48004A provides the hardware packet sampling portion of the HP-EASE protocol. This capability can be used to imple-
ment a “true” HP-EASE compliant product, or as a method to implement sampled management such as statistical
RMON.
Figure 15: HP-EASE Stack
A system implementing HP-EASE provides network management functions similar to RMON. However, a network
device (or CPU) implementing HP-EASE is not required to have the extensive CPU or memory resources needed to
fully implement all groups of RMON. EASE significantly reduces the requirement for these resources by statistically
sampling data on network segments while RMON requires the processing of every network event. The philosophy of
EASE is to off-load the intelligence and processing power required for network monitoring to the network management
station rather than the network device.
16.1
HP EASE Technology Overview
A system with HP EASE provides network management functions similar to RMON. However, a network device (or CPU)
implementing HP EASE is not required to have the extensive CPU or memory resources needed to fully implement all
groups of RMON. EASE significantly reduces the requirement for these resources by statistically sampling data on net-
work segments. RMON requires the processing of every network event. The philosophy of EASE is to off-load the intel-
ligence and processing power required for network monitoring to the network management station rather than the
network device.
H/W PACKET SAMPLING
(BUILT INTO GT-48001A)
SOFTWARE ON
MANAGEMENT
PROCESSOR
SAMPLE
CONTROL
SAMPLE
PROCESSING
COUNTER
PROCESSING
SNMP
ENCAPSULATION
SNMP
AGENT
MANAGEMENT STATION
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