Consolidated Platform Configuration Guide, Cisco Ios Release 15.2(4)E (Catalyst 2960-X Switches - Cisco Catalyst 2960 series Configuration Manual

Information About Configuring IPv6 ACLs
• IPv6 router ACLs - Supported on outbound or inbound traffic on Layer 3 interfaces, which can be routed
ports, switch virtual interfaces (SVIs), or Layer 3 EtherChannels. Applied to only IPv6 packets that are
routed.
• IPv6 port ACLs - Supported on inbound traffic on Layer 2 interfaces only. Applied to all IPv6 packets
entering the interface.
If you configure unsupported IPv6 ACLs, an error message appears and the configuration does not take
Note
affect.
The switch does not support VLAN ACLs (VLAN maps) for IPv6 traffic.
You can apply both IPv4 and IPv6 ACLs to an interface.
As with IPv4 ACLs, IPv6 port ACLs take precedence over router ACLs:
• When an input router ACL and input port ACL exist in an SVI, packets received on ports to which a
port ACL is applied are filtered by the port ACL. Routed IP packets received on other ports are filtered
by the router ACL. Other packets are not filtered.
• When an output router ACL and input port ACL exist in an SVI, packets received on the ports to which
a port ACL is applied are filtered by the port ACL. Outgoing routed IPv6 packets are filtered by the
router ACL. Other packets are not filtered.
If any port ACL (IPv4, IPv6, or MAC) is applied to an interface, that port ACL is used to filter packets,
Note
and any router ACLs attached to the SVI of the port VLAN are ignored.
Supported ACL Features
IPv6 ACLs on the switch have these characteristics:
• Fragmented frames (the fragments keyword as in IPv4) are supported.
• The same statistics supported in IPv4 are supported for IPv6 ACLs.
• If the switch runs out of TCAM space, packets associated with the ACL label are forwarded to the CPU,
and the ACLs are applied in software.
• Routed or bridged packets with hop-by-hop options have IPv6 ACLs applied in software.
• Logging is supported for router ACLs, but not for port ACLs.
IPv6 ACL Limitations
With IPv4, you can configure standard and extended numbered IP ACLs, named IP ACLs, and MAC ACLs.
IPv6 supports only named ACLs.
The switch supports most Cisco IOS-supported IPv6 ACLs with some exceptions:

Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)

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