Ipv6 Acl Naming; Ipv6 Acl Match Order - H3C S5500-EI series Operation Manual

Operation Manual – ACL
H3C S5500-EI Series Ethernet Switches

1.3.2 IPv6 ACL Naming

When creating an IPv6 ACL, you can specify a unique name for it. Afterwards, you can
identify the IPv6 ACL by its name.
An IPv6 ACL can have only one name. Whether to specify a name for an ACL is up to
you. After creating an ACL, you cannot specify a name for it, nor can you change or
remove the name of the ACL.
Note:
The name of an IPv6 ACL must be unique among IPv6 ACLs. However, an IPv6 ACL
and an IPv4 ACL can share the same name.

1.3.3 IPv6 ACL Match Order

Similar to IPv4 ACLs, IPv6 ACLs are sequential collections of rules defined with
different matching parameters. The order in which a packet is matched against the
rules in an IPv6 ACL may affect how the packet is handled.
Like in IPv4 ACLs, the following two match orders are available in IPv6 ACLs:
config: where rules are compared against in the order in which they are
configured.
auto: where depth-first match is performed.
I. Depth-first match for a basic IPv6 ACL
The following shows how your switch 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 switch 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.
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Chapter 1 ACL Overview