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VSC7440 Datasheet(PDF) 239 Page - Microsemi Corporation

Part # VSC7440
Description  L2/L3 Enterprise Gigabit Ethernet Switch with 10 Gbps Links
PDF  444 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC7440 Datasheet(HTML) 239 Page - Microsemi Corporation

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Functional Descriptions
VMDS-10492 VSC7440 Datasheet Revision 4.2
222
Figure 63 •
Group Scheduling Mode
Mode 2: Microwave Backhaul (MBH) mode. This mode is used when many queue groups need to be
arbitrated per queuing class, and they share a common outgoing quality of service policy. For example, it
may be possible to have 100 queues per queuing class arbitrated on level 0 and 1, and class selected on
level 2. In this case, the SE table is used by SE = QMAP_SE_TBL (qgrp – (qgrp MOD 16) + qc, dport),
inp = qgrp MOD 16.
The following illustration shows the Mobile Backhaul mode.
Figure 64 •
Mobile Backhaul Mode
qgrp 0, qos 0
qgrp
n, qos 7
qgrp 0, qos 1
qgrp 1, cos 0
qgrp
n, cos 7
qgrp 1, cos 1
qgrp 17, cos 0
qgrp
n, cos 7
qgrp 17, cos 1
Scheduler
Element
Super
prio
1
Scheduler
Element
Scheduler
Element
Scheduler
Element
Transmit
Requests
Scheduler
Element
Scheduler
Element
qgrp 0, qos 0
qgrp 15, qos 0
qgrp 1, qos 0
qgrp 112, qos 0
qgrp 113, qos 0
qgrp 127, qos 0
qgrp 112, qos 7
qgrp 127, qos 7
qgrp 113, qos 7
Scheduler
Element
Super
prio
1
Scheduler
Element
Scheduler
Element
Scheduler
Element
Transmit
Requests
Scheduler
Element
Scheduler
Element



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