AR8327-AL1A-R datasheet(153/394 Pages) ETC2

153 / 394 page

Atheros Communications, Inc.

AR8327/AR8327N Seven-port Gigabit Ethernet

Switch

•

153

3.6.30

PORT3_LOOKUP_CTRL

Address 0x0684

SFT&HW RST

Table 3-136 summarizes the PORT3_LOOKUP_CTRL Register

R/W

IGMP_LEARN_LIMIT_DROP_EN

1'b1: if IGMP GROUP ADDR is not in

ARL table or IGMP GROUP ADDR in

ARL but port member is not the source

port, packet should be dropped when

Learned MAC address counter is equal

to IGMP_JOIN_CNT_2

1'b0: if IGMP GROUP ADDR is not in

ARL table or IGMP GROUP ADDR in

ARL but port member is not the source

port, packet should be redirect to cpu

when Learned MAC address counter

is equal to IGMP_JOIN_CNT_2

25:16

R/W

IGMP_JOIN_CNT_2

HARDWARE JOIN IGMP. WHEN

JOIN NEW ENTRY OR NEW PORT TO

IGMP +1, LEAVE OR AGE -1

15:12

R/W

SA_LEARN_STATUS_2

IF LESS THAN 0X7, DYNAMIC CAN

BE FRESH TO SETTING VALUE AND

AGE

R/W

SA_LEARN_LIMIT_EN_2

1'b1: SA Learn Limit enable.

R/W

SA_LEARN_LIMIT_DROP_EN_2

1'b1: if SA is not in ARL table or SA in

ARL but port member is not the source

port, packet should be dropped when

Learned MAC address counter is equal

to SA_LEARN_CNT_2

1'b0: if SA is not in ARL table or SA in

ARL but port member is not the source

port, packet should be redirect to cpu

when Learned MAC address counter

is equal to SA_LEARN_CNT_2

9:0

R/W

SA_LEARN_CNT_2

The MAC address can be learned and

written to the ARL table — only

dynamic entry is counted

0: indicates no MAC limit number is 1

1: indicates the MAC limit number is 2

2: indicates the MAC limit number is 3

... and so on ... until:

1023: indicates the MAC limit is 1024

Bit

R/W

Inital

Value

Mnemonic

Description

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