Which action can change the order of entries in a named access-list?
- removing an entry
- opening the access-list in notepad
- adding an entry
Explanation: You can check the named access-list with the “show ip access-list” (or “show access-list”) command:
R1#show ip access-list Standard IP access list nat_traffic 10 permit 10.1.0.0, wildcard bits 0.0.255.255 15 permit 10.2.0.0, wildcard bits 0.0.255.255 20 permit 10.3.0.0, wildcard bits 0.0.255.255
We can resequence a named access-list with the command: “ip access-list resequence access-list-name starting-sequence-number increment“. For example:
R1(config)#ip access-list nat_traffic 100 10
Then we can check this access-list again:
R1#show ip access-list Standard IP access list nat_traffic 100 permit 10.1.0.0, wildcard bits 0.0.255.255 110 permit 10.2.0.0, wildcard bits 0.0.255.255 120 permit 10.3.0.0, wildcard bits 0.0.255.255
We can see the starting sequence number is now 100 and the increment is 10. But notice that resequencing an access-list cannot change the order of entries inside it but it is the best choice in this question. Adding or removing a n entry does not change the order of entries. Maybe we should understand this question “how to renumber the entries in a named access-list”.
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