KSZ9563RNXC-TR datasheet(78/226 Pages) MICROCHIP

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KSZ9563R

DS00002419D-page 78

 2017-2018 Microchip Technology Inc.

5.1.4.13

Switch Lookup Engine Control 2 Register

Address:

0x0312

Size:

8 bits

Bits

Description

Type

Default

RESERVED

R/W

Double Tag Multicast Trap

1 = When double tagging mode is enabled, forward all reserved multicast

packets to the host port only.

0 = Normal forwarding

R/W

Dynamic Entry Egress VLAN Filtering

Egress VLAN filtering uses the forwarding port map from the VLAN table to

restrict the forwarding ports determined from the address lookup. This is the

recommended mode of operation when VLAN is enabled. The default value

is 0 only for backwards compatibility with previous switches.

1 = Enable. For successful lookup of a dynamic entry in the address table,

the forwarding ports are determined from the AND function of the address

table port map and the VLAN table port map.

0 = Disable. For successful lookup of a dynamic entry in the address table,

the forwarding ports are determined from the address table only.

R/W

Static Entry Egress VLAN Filtering

Egress VLAN filtering uses the forwarding port map from the VLAN table to

restrict the forwarding ports determined from the address lookup. This is the

recommended mode of operation when VLAN is enabled. The default value

is 0 only for backwards compatibility with previous switches.

1 = Enable. For successful lookup of a static entry in the address table, the

forwarding ports are determined from the AND function of the address table

port map and the VLAN table port map.

0 = Disable. For successful lookup of a static entry in the address table, the

forwarding ports are determined from the address table only.

R/W

3:2

Flush Option

Determines which address lookup table entries may be flushed by either of

the flush operations in the Switch Lookup Engine Control 1 Register.

00 = No flush or flush is done

01 = Flush only dynamic table entries

10 = Flush only static table entries

11 = Flush both static and dynamic table entries

R/W

00b

1:0

MAC Address Priority

00 = MAC Address (MACA) priority for a packet is determined from the

destination address (DA) lookup

01 = MACA priority for a packet is determined from the source address (SA)

lookup

10 = MACA priority for a packet is determined from the higher of the DA and

SA lookups

11 = MACA priority for a packet is determined from the lower of the DA and

SA lookups

R/W

00b

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