Configuration guidelines
When you configure an ACL, follow these guidelines:
You cannot add a rule with, or modify a rule to have, the same permit/deny statement as an
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existing rule in the ACL.
You can only modify the existing rules of an ACL that uses the match order of config. When
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modifying a rule of such an ACL, you may choose to change just some of the settings, in which case
the other settings remain the same.
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