AR8327-AL1A-R datasheet(28/394 Pages) ETC2

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28 • AR8327/AR8327N Seven-port Gigabit Ethernet Switch

Atheros Communications, Inc.

28 • June 2011

COMPANY CONFIDENTIAL

2.7.2

Action Definition

The action will be taken when the defined pattern is matched.

In the ACL rule matching, AR8327 support two match consolidation. If the key of ingress frame

matched with two entries in the ACL, then these two actions will consolidate. The basic rule for

consolidation is the first action will be the first priority if the related bit is active. If the related bit of the

first entry is inactive, then the second entry is used. But for ACL_MATCH_INT_EN, ACL_DP_ACT

and MIRROR_EN field will be the OR operation between two actions.

ENHANCED MAC Pattern

0UNVALID Pattern

Table 2-6.

Action Definition

Bits

Name

Description

ACL_MATCH_INT_EN

Generate interrupt

ACL_EG_TRNAS_BYPASS

Bypass egress QinQ result

ACL_RATE_EN

1'b1: use acl rate limit;

1'b0: don't use acl rate limit

77:73

ACL_RATE_SEL

Select acl rate limit (index)

72:70

ACL_DP_ACT

111:drop

011:redirect

001:copy to cpu

000:forward

MIRROR_EN

1'b1: mirror packet to mirror port

DES_PORT_OVER_EN

1'b1: use DES_PORT to determine packet Destination Port, can

cross VLAN.

67:61

DES_PORT

If DES_PORT_EN set to 1'b1, these bits will be used to

determine destination port.

ENQUEUE_PRI_OVER_EN

1'b1: use ENQUEUE_PRI to determine en-queue priority

59:57

ENQUEUE_PRI

En-queue priority

ARP_WCMP

1'b1: select hash

55:49

ARP_INDEX

Index of ARP table

ARP_INDEX_OVER_EN

Overwrite the ROUTER's Result

47:46

FORCE_L3_MODE

00: no force

01: SNAT

10: DNAT

11: RESERVED

LOOKUP_VID_CHANGE_EN

1'b1: lookup use VID in STAG or CTAG, determined by switch

tag mode. For S-TAG mode, use STAG; for C-TAG mode, use

CTAG.

TRANS_CTAG_CHANGE_EN

Enqueue egress translation key change en

TRANS_STAG_CHANGE_EN

Enqueue egress translation key change en

CTAG_DEI_CHANGE_EN

1'b1: frame should be send out by CTAG CFI be changed to

CTAG[12]

Table 2-5.

PatternTypes

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