KSZ9567RTXI datasheet(46/232 Pages) MICROCHIP

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KSZ9567R

DS00002329D-page 46

 2017-2019 Microchip Technology Inc.

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).

• When 0, the unit is microsecond.

• When 1, the unit is millisecond.

The CA bit (located in the Action rule) determines the algorithm used to generate an interrupt when the count terminates.

• When 0, an 11-bit counter will be loaded with the count value from the list and start counting down every unit time.

An interrupt will be generated when the timer expires, i.e. the next qualified packet has not been received within

the period specified by the value.

• When 1, the counter is incremented with every matched packet received. An interrupt is generated when the ter-

minal count is reached. The count resets thereafter. Time units are not used in this mode.

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

TABLE 4-18:

ACL MATCHING RULE PARAMETERS FOR MD = 10

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 = Reserved

01 = IPv4 source or destination address (with mask)

10 = IPv4 source and destination address (without mask)

11 = Reserved

S/D

Source / Destination

0 = Destination address

1 = Source address

Equal / Not Equal

0 = Not Equal produces true result

1 = Equal produces true result

IP ADDRESS[31:0]

IPv4 address

Source or destination address (determined by S/D) when ENB = 01,

Source address when ENB = 10

TABLE 4-17:

ACL MATCHING RULE PARAMETERS FOR MD = 01 (CONTINUED)

Parameter

Description

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