AR8327-AL1A-R datasheet(337/394 Pages) ETC2

337 / 394 page

Atheros Communications, Inc.

AR8327/AR8327N Seven-port Gigabit Ethernet

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337

Table 3-353.

HNAT Control Register

Bit

R/W

Inital

Value

Mnemonic

Description

31:23

R/O

RESERVED

R/W

NAPT_AGE_SPD_UP_STEP

0:Double

1:Quadruple

To control the speed up degree, if set as

0, double the aging speed, if set as

1,quadruple the aging speed;

21:20

R/W

NAPT_AGE_SPD_UP_THRESH

0:Disable;

1:1/4;

2:1/8,

3:1/16

The ratio of the remaining entry

number; when reach the ratio, aging

scheme will speed up

19:18

R/W

NAPT_UDP_AGE_STEP

0:1

1:2

2:3

3:4

To set the UDP aging step value

17:16

R/W

NAPT_TCP_AGE_STEP

0:1

1:2

2:3

3:4

To set the TCP aging step value,GRE

share the same setting;

15:8

R/W

0xa

NAPT_AGE_TIMER

28sxN

N=0, Aging Disable

NAPT and GRE share the same age

setting

R/W

NAPT_AGE_MODE

0:normal age mode;

1:stop age when napt age_flag is 1;

6:5

R/W

NAT_HASH_MODE

0: SP

1: SIP

2: SP+SIP

3: Reserved

R/W

NAPT_OVERWRITE_EN

1: when entry violation, new entry can

overwrite old entry;

0: Cannot overwrite;

3:2

R/W

NAPT_MODE

0: Full Cone Mode

1: Strict Cone Mode

2: Port strict mode/Symmetric Mode

3: Reserved

R/W

HNAT_EN

Enable or Disable Basic NAT

R/W

HNAPT_EN

Enable or Disable HNAPT

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