VSC7440 datasheet(141/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

124

Figure 27 •

Example of QoS Mappings

3.16.4

Analyzer Classifier Diagnostics

The analyzer classifier contains a large set of sticky bits that can inform about the frame processing and

decisions made by ANA_CL. The following categories of sticky bits are available.

•

Frame acceptance filtering (ANA_CL::FILTER_STICKY, ANA_CL::VLAN_FILTER_STICKY).

•

VLAN and QoS classification (ANA_CL::CLASS_STICKY)

•

CPU forwarding (ANA_CL::CAT_STICKY)

•

VCAP CLM lookups and actions, QoS mapping tables (ANA_CL::ADV_CL_STICKY)

•

IP header checks (ANA_CL::IP_HDR_CHK_STICKY)

The sticky bits are common for all ports in the analyzer classifier. All sticky bits, except for VCAP CLM

sticky bits, have four corresponding sticky mask bits (ANA_CL:STICKY_MASK) that allow any sticky bit

to be counted by one of the four per-port analyzer access control counters. For more information, see

Analyzer Statistics, page 198.

3.17

VLAN and MSTP

The VLAN table and the MSTP table are the two main tables that control VLAN and Spanning Tree frame

processing.

Row: 0

Row: 255

Entry: 0

Entry: 7

ANA_CL:MAP_TBL

MAP_IDX

DEI=0

PCP=0

DEI=1

PCP=7

DEI=1

PCP=3

DSCP=0

DSCP=26

DSCP=63

Frame

DMAC

SMAC

VLAN

tag0

VLAN

tag1

VLAN

tag2

IPv4 header

FCS

128

135

Mapping 0:

VCAP CLM action MAP_KEY = 0

VCAP CLM action MAP_IDX = 8

Frame.DEI = 1

Frame.PCP = 3)

QOS_VAL = 3

DP_VAL = 1

PCP_VAL = 5

DEI_VAL = 1

DSCP_VAL = 45

Mapping 1:

VCAP CLM action MAP_KEY = 6

VCAP CLM action MAP_IDX = 128

Frame.DSCP = 26

MAP_IDX

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