KSZ9567R datasheet(45/232 Pages) MICROCHIP

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KSZ9567R

• 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.

4.4.18.2

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.

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

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