KSZ9567R datasheet(45/233 Pages) MICROCHIP

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DS00002329E-page 45

KSZ9567R

The examples in Figure 4-7 are interpreted as follows:

• Rule #0: Test the matching rule entry #0. If true, apply action rule entry #0.

• Rule #1: Test the matching rule entry #1. If true, apply action rule entry #0.

• Rule #2: Test the matching rule entry #2. If true, apply action rule entry #1.

• Matching rule entry #3 is configured for the counter function. Action entry #3 is used to hold the corresponding

count value.

• Rule #4: Test the matching rule entries #4, 5 and 6. If all are true, apply action rule entry #4.

• Rule #6: Test the matching rule entry #6. If true, apply action rule entry #5.

• Rule #8: Test the matching rule entries #7 and 11. If both are true, apply action rule entry #9.

No more than one action can be taken for any packet. If the matching conditions are true for multiple RuleSets, then the

corresponding FRN field with the lowest value (highest priority) determines the action to be taken.

Note that processing entries #0 and 1 produce an OR function: action #0 is taken if RuleSet #0 or RuleSet #1 is true.

Notice that processing entries #4 and 6 have overlapping RuleSets, but different FRNs. This can be summarized as:

If match #4, 5 and 6 are all true, then apply action #4,

Else if match #6 is true, then apply action #5.

Table 4-16 summarizes the available matching options. The MD and ENB fields are used to select the desired matching

option. More configuration details are given in the following section.

FIGURE 4-7:

ACL STRUCTURE AND EXAMPLE RULE VALUES

FRN

#15

#14

#13

#12

#11

#10

none

4, 5, 6

none

7, 11

none

RuleSet

Processing Field

Entry Number

Entry #0

Entry #1

Entry #2

Entry #3

Entry #4

Entry #5

Entry #6

Entry #7

Entry #8

Entry #9

Entry #10

Entry #11

Entry #12

Entry #13

Entry #14

Entry #15

Entry #0

Entry #1

Entry #2

Entry #3

Entry #4

Entry #5

Entry #6

Entry #7

Entry #8

Entry #9

Entry #10

Entry #11

Entry #12

Entry #13

Entry #14

Entry #15

Action Rule

Matching Rule

Action Field

AND

When counter

function is enabled

in Matching Rule.

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