Operation Manual – ACL
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 ACL Overview
1-6
z
auto
: where depth-first match is performed.
I. Depth-first match for a basic IPv6 ACL
The following shows how your device performs depth-first match in a basic IPv6 ACL:
1)
Sort rules by source IPv6 address wildcard first and compare packets against the
rule configured with a longer prefix in the source IPv6 address wildcard prior to
other rules.
2) If two rules are present with the same prefix length in their source IPv6 address
wildcards, compare packets against the rule configured first prior to the other.
II. Depth-first match for an advanced IPv6 ACL
The following shows how your device performs depth-first match in an advanced IPv6
ACL:
1) Sort rules by protocol range first, and compare packets against the rule with the
protocol carried on IPv6 specified prior to other rules.
2)
If two rules are present with the same protocol range, look at source IPv6 address
wildcard in addition. Then, compare packets against the rule configured with a
larger prefix length in the source IPv6 address wildcard prior to the other.
3)
If the prefix lengths in the source IPv6 address wildcards are the same, look at the
destination IPv6 address wildcards. Then, compare packets against the rule
configured with a larger prefix length in the destination IPv6 address wildcard prior
to the other.
4)
If the prefix lengths in the destination IPv6 address wildcards are the same, look at
the Layer 4 port number (TCP/UDP port number). Then compare packets against
the rule configured with the lower port number prior to the other.
5) If the port numbers are the same, compare packets against the rule configured
first prior to the other.
The comparison of a packet against an ACL stops once a match is found. The packet is
then processed as per the rule.
