AR8327-AL1A-R datasheet(141/394 Pages) ETC2

141 / 394 page

Atheros Communications, Inc.

AR8327/AR8327N Seven-port Gigabit Ethernet

Switch

•

141

R/W

1'b0

PORT_LOOPBACK_EN_0

1'b1: LOOP BACK. Packet sent in from

this port will be sent out from the same

port. This packet will not sent to other

ports

1'b0: NORMAL FORWARDING

R/W

1'b1

LEARN_EN_0

Enable learn operation.

1'b1: enable hardware learn new MAC

address into ARL table.

1'b0: won't learn new MAC address to

ARL table

R/O

RESERVED

18:16

R/W

3'h4

PORT_STATE_0

Port State. These bits are used to

manage the port to determine what

kind of frames are allowed to enter or

leave the port for simple bridge loop

detection or 803.1D Spanning Tree.

3'b000: Disable mode. The port is

completely disable, and can't receive or

transmit any frames.

3'b001: Blocking Mode. In this state, the

port forwards received management

frames to the designed port only. Any

other frames can't be transmitted or

received by the port, and without

learning any SA address.

3'b010: Listening Mode. In this state,

the port will receive and transmit only

management frames, but without

learning any SA address. Any other

frames can't be transmitted or received

by the port.

3'b011: Learning Mode. In this state,

the port will learning all SA, and

discard all frames except management

frames, and only management frames

allowed to be transmitted out.

3'b100: Forward Mode. In this state, the

port will learning all SA, transmit and

receive all frames like normal.

R/O

RESERVED

14:12

R/O

RESERVED

R/O

RESERVED

R/W

FORCE_PORT_VLAN_EN_0

1'b1: force to use port base vlan enable.

If this bit is set to 1'b1, use port base

vlan & vlan table result to determine

destination port.

Bit

R/W

Inital

Value

Mnemonic

Description

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