AR8327-AL1A-R datasheet(52/394 Pages) ETC2

52 / 394 page

52 • AR8327/AR8327N Seven-port Gigabit Ethernet Switch

Atheros Communications, Inc.

52 • June 2011

COMPANY CONFIDENTIAL

2.19.3

Router MAC Address

There are 8 entries in the Router MAC address table. Each entry is 74 bits wide. The detail format is

shown in Table 2-36.

97:96

ACTION

2'b00: Mirror

2'b01: Redirect

2'b10: Copy

2'b11: Forward

95:84

SIP

12bits private SIP.

The private IP is constructed under the control bit

PRIVATE_IP_BASE_SEL

1'b1: these 12 bits are the private IP bit [19:16] and [7:0].

1'b0: these 12 bits are the private IP bit [11:0].

When do SNAT, compare with frame SIP.

When do DNAT, frame DIP should be change to these bits.

83:80

TRANS IP INDEX

Translation IP index in public IP table.

When do DNAT, compare with frame DIP. Use these bits to select IP

address in public IP table.

When do SNAT, frame SIP should be change to IP, use these bits to select

IP address in public IP table.

79:64

TRANS PORT NUM

Translated Port number or Call ID

When do DNAT, compare with frame DP. or CALL ID

When do SNAT, frame SP should be change to these bits.

63:48

When do SNAT, compare with frame SP

When do DNAT, frame DP should be change to these bits

47:32

When do SNAT, compare with frame DP

When do DNAT, compare with frame SP

31:0

DIP

When do SNAT, compare with frame DIP

When do DNAT, compare with frame SIP

Table 2-36.

Router MAC Address Table

Bit

Name

Description

73:72

ROUTER_MAC_ACT

2'b00: invalid

2'b01: ipv4 router

2'b10: ipv6 router

2'b11: ipv4 & ipv6 router

71:60

VID_HIGH

VID range

59:48

VID_LOW

47:0

ROUTER MAC ADDR

Router mac addressNote: DA

Table 2-35.

NAPT Entry Table

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