KSZ9567R datasheet(46/233 Pages) MICROCHIP

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KSZ9567R

DS00002329E-page 46

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4.4.17.2

Matching Rule Description

The Matching Rule consists of several parameters. The first two parameters, MD[1:0] and ENB[1:0], determine the orga-

nization of the remainder of each Matching Rule.

When MD = 00, the Matching Rule is disabled.

Details for MD = 01, ENB = 00:

The 11 bits of the aggregated bit fields from PM, P, RPE, RP and MM in the Action rule entry specify a count value for

packets matching MAC Address and TYPE in the Matching Field.

The count unit is determined by the TU bit (located in the Action rule).

TABLE 4-16:

MATCHING RULE OPTIONS

MD[1:0]

ENB[1:0]

Matching Rule

Matching rule disabled

(Layer 2 matching:

MAC address,

EtherType)

Action field is used as count value for packets matching MAC address and

EtherType

Compare EtherType only

Compare MAC address only

Compare both MAC address and EtherType

(Layer 3 matching:

IP address)

Reserved

Compare IPv4 source and destination address (with mask)

Compare both source and destination IPv4 addresses (without mask)

Reserved

(Layer 4 matching:

TCP, UDP,

IP protocol)

Compare IPv4 protocol

Compare TCP source port or destination port

Compare UDP source port or destination port

Compare TCP sequence number

TABLE 4-17:

ACL MATCHING RULE PARAMETERS FOR MD = 01

Parameter

Description

MD[1:0]

MODE

00 = Matching rule is disabled

01 = Layer 2 MAC header or counter filtering

10 = Layer 3 IP header filtering

11 = Layer 4 TCP header (and IP protocol) filtering

ENB[1:0]

00 = Count Mode. Both the MAC Address and TYPE are tested. A count value (either

time or packet count) is also incorporated. Details are given below this table.

01 = Comparison is performed only on the TYPE value

10 = Comparison is performed only on the MAC Address value

11 = Both the MAC Address and TYPE are tested

S/D

Source / Destination

0 = Destination address

1 = Source address

Equal / Not Equal

0 = Not Equal produces true result

1 = Equal produces true result

MAC ADDRESS[47:0]

48-bit MAC address

TYPE[15:0]

EtherType

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