General editing rules
You can use the CLI to delete individual ACEs
from anywhere in an ACL, append new ACEs to the end of an ACL, and
insert new ACEs anywhere within an ACL.
When you enter a new ACE in an ACL without specifying a sequence number, the switch inserts the ACE as the last entry in the ACL.
When you enter a new ACE in an ACL and include a sequence number, the switch inserts the ACE according to the position of the sequence number in the current list of ACEs.
You can delete an ACE by using the
ipv6 access-list <identifier>command to enter the ACL's context, and thenno <seq–#>Deleting the last ACE from an ACL leaves the ACL in the configuration as an "empty" ACL placeholder that cannot perform any filtering tasks. (In any ACL, the implicit deny does not apply unless the ACL includes at least one explicit ACE.