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參數資料
| 型號： | MVTX2802AG |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 網絡接口 |
| 英文描述： | Managed 4-Port 1000 Mbps Ethernet Switch |
| 中文描述： | DATACOM, LAN SWITCHING CIRCUIT, PBGA596 |
| 封裝： | 40 X 40 MM, 2.33 MM HEIGHT, MS-034, HSBGA-596 |
| 文件頁數： | 26/154頁 |
| 文件大?。?/td> | 1936K |
| 代理商： | MVTX2802AG |
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MVTX2802
Data Sheet
26
Zarlink Semiconductor Inc.
We assume that the network manager knows his applications, such as voice, file transfer, or web browsing, and
their relative importance. The manager can then subdivide the applications into classes and set up a service
contract with each. The contract may consist of bandwidth or latency assurances per class. Sometimes it may
even reflect an estimate of the traffic mix offered to the switch, though this is not required.
The table below shows examples of QoS applications with eight transmission priorities, including best effort
traffic for which we provide no bandwidth or latency assurances.
In our model, it is possible that a class of traffic may attempt to monopolize system resources by sending data at a
rate in excess of the contractually assured bandwidth for that class. A well-behaved class offers traffic at a rate no
greater than the agreed-upon rate. By contrast, a misbehaving class offers traffic that exceeds the agreed-upon
rate. A misbehaving class is formed from an aggregation of misbehaving microflows. To achieve high link utilization,
a misbehaving class is allowed to use any idle bandwidth. However, the quality of service (QoS) received by
well-behaved classes must never suffer.
As Table 1 illustrates, each traffic class may have its own distinct properties and applications. As shown,
classes may receive bandwidth assurances or latency bounds. In the example, P7, the highest transmission
class, requires that all frames be transmitted within 0.2 ms, and receives 30% of the 1 Gbps of bandwidth at that
port.
Best-effort (P1-P0) traffic forms a lower tier of service that only receives bandwidth when none of the other
classes have any traffic to offer.
In addition, each transmission class has two subclasses, high-drop and low-drop. Well-behaved users should
not lose packets. But poorly behaved users – users who send data at too high a rate – will encounter frame
Class
Example
Assured Bandwidth
(user defined)
Low Drop Subclass
(If class is
oversubscribed, these
packets are the last to be
dropped.)
High Drop Subclass
(If class is
oversubscribed, these
packets are the first to be
dropped.)
Highest transmission
priorities, P7
Latency < 200
μ
s
Highest transmission
priorities, P6
Latency < 200
μ
s
Middle transmission
priorities, P5
Latency < 400
μ
s
Middle transmission
priorities, P4
Latency < 800
μ
s
Low transmission
priorities, P3
Latency < 1600
μ
s
Low transmission
priorities, P2
Latency < 3200
μ
s
Best effort, P1-P0
TOTAL
300 Mbps
Sample application:
control information
200 Mbps
Sample applications:
phone calls; circuit
emulation
Sample application:
interactive activities
Sample application:
training video; other
multimedia
Sample application:
non-critical interactive
activities
125 Mbps
250 Mbps
Sample application:
web
business
80 Mbps
Sample application:
file
backups
45 Mbps
Sample application:
email
Sample application:
web
research
–
Sample application:
casual web browsing
1 Gbps
Table 1 - Two-dimensional World Traffic
相關PDF資料 |
PDF描述 |
|---|---|
| MVTX2803 | Unmanaged 8-Port 1000 Mbps Ethernet Switch |
| MVTX2803AG | Unmanaged 8-Port 1000 Mbps Ethernet Switch |
| MVTX2804 | 8-Port 1000 Mbps Ethernet Distributed Switch |
| MVTX2804AG | 8-Port 1000 Mbps Ethernet Distributed Switch |
| MVV200 | Analog IC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MVTX2803 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Unmanaged 8-Port 1000 Mbps Ethernet Switch |
| MVTX2803A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Unmanaged 8 port Gigabit Ethernet switch |
| MVTX2803AG | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Unmanaged 8-Port 1000 Mbps Ethernet Switch |
| MVTX2803AG2 | 制造商:Microsemi Corporation 功能描述: |
| MVTX2804 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:8-Port 1000 Mbps Ethernet Distributed Switch |
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