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KSZ9567RTXI-TR 数据表(PDF) 44 Page - Microchip Technology |
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KSZ9567RTXI-TR 数据表(HTML) 44 Page - Microchip Technology |
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44 / 232 page  KSZ9567R DS00002329D-page 44 2017-2019 Microchip Technology Inc. Each of the 16 processing entries is used to link any number of matching rules (specified in RuleSet) to any one action rule (specified in FRN). When there are multiple matching rules in a RuleSet, those rules are AND'ed together. Only if all of those matching results are true will the FRN action be taken. It is also possible to configure the ACL table so that multiple processing entries specify the same action rule. In this way, the final matching result is the OR of the matching results from each of the multiple RuleSets. The 16 ACL rules represent an ordered list, with entry #0 having the highest priority and entry #15 having the lowest priority. All matching rules are evaluated. If there are multiple true match results and multiple corresponding actions, the highest priority (lowest numbered) of those actions will be the one taken. 4.4.18.1 Processing Entry Description The Processing Entry consists of two parameters as described in Table 4-15. 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. TABLE 4-15: ACL PROCESSING ENTRY PARAMETERS Parameter Description FRN[3:0] First Rule Number Pointer to an Action rule entry. Possible values are 0 to 15. If all Matching rules speci- fied in the RuleSet are evaluated true, then this is the resulting Action rule. RuleSet[15:0] Specifies a set of one or more Matching rule entries. RuleSet has one bit for each of the 16 Matching rule entries. If multiple Matching rules are selected, then all conditions will be AND'ed to produce a final match result. 0 = Matching rule not selected 1 = Matching rule selected FIGURE 4-7: ACL STRUCTURE AND EXAMPLE RULE VALUES FRN 0 0 1 4 5 9 #0 #15 #14 #13 #12 #11 #10 #9 #8 #7 #6 #5 #4 #3 #2 #1 0 1 2 none 4, 5, 6 none 6 none 7, 11 none none none none none none 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 OR AND When counter function is enabled in Matching Rule. |
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