Acl Rule Numbering - HP 1910 User Manual

Table 132 Depth-first match for ACLs
ACL category
IPv4 basic ACL
IPv4 advanced ACL
IPv6 basic ACL
IPv6 advanced ACL
Ethernet frame header ACL
NOTE:
A wildcard mask, also called an "inverse mask", is a 32-bit binary and represented in dotted decimal
notation. In contrast to a network mask, the 0 bits in a wildcard mask represent 'do care' bits, while the 1
bits represent 'don't care bits'. If the 'do care' bits in an IP address identical to the 'do care' bits in an IP
address criterion, the IP address matches the criterion. All 'don't care' bits are ignored. The 0s and 1s in
a wildcard mask can be noncontiguous. For example, 0.255.0.255 is a valid wildcard mask.

ACL rule numbering

What is the ACL rule numbering step
If you do not assign an ID for the rule you are adding, the system automatically assigns it a rule ID. The
rule numbering step sets the increment by which the system automatically numbers rules. For example, the
default ACL rule numbering step is 5. If you do not assign IDs to rules you are adding, they are numbered
0, 5, 10, 15, and so on. The wider the numbering step, the more rules you can insert between two rules.
By introducing a gap between rules rather than contiguously numbering rules, you have the flexibility of
inserting rules in an ACL. This feature is important for a config order ACL, where ACL rules are matched
in ascending order of rule ID.
Automatic rule numbering and re-numbering
The ID automatically assigned to an ACL rule takes the nearest higher multiple of the numbering step to
the current highest rule ID, starting with 0.
Sequence of tie breakers
6. More 0s in the source IP address wildcard (more 0s means a narrower IP
address range)
7. Smaller rule ID
8. Specific protocol type rather than IP (IP represents any protocol over IP)
9. More 0s in the source IP address wildcard mask
10. More 0s in the destination IP address wildcard
11. Narrower TCP/UDP service port number range
12. Smaller ID
13. Longer prefix for the source IP address (a longer prefix means a narrower IP
address range)
14. Smaller ID
15. Specific protocol type rather than IP (IP represents any protocol over IPv6)
16. Longer prefix for the source IPv6 address
17. Longer prefix for the destination IPv6 address
18. Narrower TCP/UDP service port number range
19. Smaller ID
20. More 1s in the source MAC address mask (more 1s means a smaller MAC
address)
21. More 1s in the destination MAC address mask
22. Smaller ID
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