KSZ9567R datasheet(194/233 Pages) MICROCHIP

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KSZ9567R

DS00002329E-page 194

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5.3.3.3

Reserved Multicast Address Table Entry 2 Register

5.3.4

VLAN TABLE

An internal VLAN Table is used for VLAN lookup. If 802.1Q VLAN mode is enabled (Switch Lookup Engine Control 0

Register), this table will be used to retrieve the VLAN information that is associated with the ingress packet. The table

holds 4096 entries - one for each possible VLAN. The table must be set up before 802.1Q VLAN is enabled. The VLAN

table is accessed one entry at a time using the following indirect registers:

• VLAN Table Entry 0 Register

• VLAN Table Entry 1 Register

• VLAN Table Entry 2 Register

• VLAN Table Index Register

• VLAN Table Access Control Register

The table data fields are described in Figure 5-4 and Table 5-4.

Address:

0x0424 - 0x0427

Size:

32 bits

Bits

Description

Type

Default

31:30

RESERVED

R/W

00b

29:7

RESERVED

0x000000

6:0

PORT FORWARD

Each bit corresponds to a device port.

Bit 0 is for port 1

Bit 1 is for port 2, etc.

1 = Forward to the corresponding port

0 = Do not forward to the corresponding port

R/W

0x00

FIGURE 5-4:

VLAN TABLE STRUCTURE

PORT FORWARD

FILTER ID

PORT UNTAG

MSTP INDEX

PRIORITY

FORWARD OPTION

VALID

Entry # 0

Entry # 4095

Entry # 4094

Entry # 1

Entry # 2

Entry # 3

Entry # 4

V FO PRIORITY MSTP FID UNTAG FORWARD

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