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VSC7511 Datasheet(PDF) 156 Page - Microsemi Corporation

Part # VSC7511
Description  4-Port Layer-2 Gigabit Ethernet Switch
PDF  324 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC7511 Datasheet(HTML) 156 Page - Microsemi Corporation

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Functional Descriptions
VMDS-10488 VSC7511 Datasheet Revision 4.2
141
The swapping of MAC addresses is useful when implementing a general hairpinning functionality where
an IS2-identified flow is hardware looped back to the source port while swapping the MAC addresses.
In addition, VCAP IS2 can trigger replacement of the source MAC address by setting
IS2_ACTION.SMAC_REPLACE_ENA = 1. The new source MAC address is configurable per egress port
through SYS::REW_MAC_LOW_CFG and SYS::REW_MAC_HIGH_CFG.
The operations of swapping of MAC addresses and replacing the source MAC address are mutually
exclusive and must not be enabled at the same time.
3.14
CPU Port Module
The CPU port module connects the switch core to the CPU system so that frames can be injected from or
extracted to the CPU. It is also possible to use a regular front port as a CPU port. This is known as a
Node Processor Interface (NPI).
The following illustration shows how the switch core interfaces to the CPU system through the CPU port
module for injection and extraction of frames.
Figure 44 •
CPU Injection and Extraction
Switch Core
FDMA
VRAP
Engine
CPU
Port 11
CPU
Port 12
Analyzer
Switch port 11, QoS class 0-7
Injection
CPU
Port 11
CPU
Port 12
Extraction
Group 0
Extraction
Group 1
FDMA
VRAP
Engine
Strict/Round robin/Weighted
(Scheduler Element configuration)
Extraction
Extraction header included?
(SYS::PORT_MODE.INCL_XTR_HDR)
Injection header included?
(SYS::PORT_MODE.INCL_INJ_HDR)
Queue to port mapping
(QSYS::CPU_GROUP_MAP)
CPU extraction queues
Switch port 11
Rewriter
Rewriter
Fixed per channel
Switch port 11
Injection
Group 0
Injection
Group 1
Register
access
Register
access



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