AR8327-AL1A-R datasheet(49/394 Pages) ETC2

49 / 394 page

Atheros Communications, Inc.

AR8327/AR8327N Seven-port Gigabit Ethernet

Switch

•

49

RESERVED

SA_DROP_EN

Drop packet enable when source address is in this entry. If this bit is set to 1’b1,

the packet with SA of this entry will be dropped.

MIRROR_EN

Indicates packets should be sent to mirror port and destination port.

Indicate packets should only be sent to destination port

PRI_EN

Priority override enable. 1: Indicates PRIORITY (ATU[58:56]) can override any

other priority determined by the frame’s data.

SVL_ENTRY

1’b1: SVL learned

1’b0: IVL learned

58:56

PRIORITY

The priority bits may be used as the frame’s priority when “PRI_OVER_EN”

(bit[60]) is set to one.

CROSS_PORT_STATE

_EN

1’b1: Cross port state enable

1’b0: Cross port state disable

54:48

DES_PORT

Indicate which ports are associated with this MAC address when they are set to

one. Bit [48] is assigned to port0, bit [49] to port1, bit [50] to port3, and so on. If

all bits are set to zero and the entry is static, the packet should be dropped.

For multicast address and unicast for link aggregation, more than one bit is set

to one.

47:0

ADDRESS

48-bit MAC address

Table 2-32.

Bit

Name

Description

Table 2-33.

RESERVED ATU Entry

Bit

Name

Description

STATUS

1’b1: static and valid

1’b0: invalid

COPY_TO_CPU

1’b1: packet received with the address should be copied to the CPU port

REDIRECT_TO_CPU 1’b1: packet received with this address should be redirected to the CPU port. If

no CPU is connected to the switch, the packet will be dropped.

LEAKY_EN

1’b1: use leaky VLAN enable for this MAC address

This bit can be used for unicast and multicast frames, controlled by

ARL_uni_leaky_en and ARL_multi_leaky_en

MIRROR_EN

1’b1: indicates packets should be sent to the mirror port and the destination

port

1’b0: indicates packets should be sent only to the destination port

PRI_OVER_EN

Priority override enable

1’b1: indicate PRIORITY (ATU[58:56]) can override any other priority

determined by the frame’s data

58:56

PRI

This priority bit may be used as a frame’s priority when PRI_OVER_EN is set

to one

CROSS_PORT_STATE

_EN

1’b1: cross port state enabled

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