Configuring Acls; Overview; Acl Categories; Match Order - HP 1910 User Manual

Configuring ACLs

Unless otherwise stated, ACLs refer to both IPv4 and IPv6 ACLs throughout this document.

Overview

An access control list (ACL) is a set of rules (or permit or deny statements) for identifying traffic based on
criteria such as source IP address, destination IP address, and port number.
ACLs are primarily used for packet filtering. You can use ACLs in QoS, security, routing, and other feature
modules for identifying traffic. The packet drop or forwarding decisions varies with the modules that use
ACLs.

ACL categories

Category
Basic ACLs
Advanced ACLs
Ethernet frame
header ACLs

Match order

The rules in an ACL are sorted in certain order. When a packet matches a rule, the device stops the match
process and performs the action defined in the rule. If an ACL contains overlapping or conflicting rules,
the matching result and action to take depend on the rule order.
The following ACL match orders are available:
Config—Sorts ACL rules in ascending order of rule ID. A rule with a lower ID is matched before a
•
rule with a higher ID. If you use this method, check the rule content and order carefully.
• Auto—Sorts ACL rules in depth-first order. Depth-first ordering ensures that any subset of a rule is
always matched before the rule.
uses to sort rules for each type of ACL.
ACL number IP version
IPv4
2000 to 2999
IPv6
IPv4
3000 to 3999
IPv6
4000 to 4999 N/A
Table 130
Match criteria
Source IPv4 address.
Source IPv6 address.
Source/destination IPv4 address, protocol number,
and other Layer 3 and Layer 4 header fields.
Source/destination IPv6 address, protocol number,
and other Layer 3 and Layer 4 header fields.
Layer 2 header fields, such as source and destination
MAC addresses, 802.1p priority, and link layer
protocol type
lists the sequence of tie breakers that depth-first ordering
475