You cannot apply more than one IP access list and one MAC access list to a Layer 2 interface. If an IP
access list or MAC access list is already configured on a Layer 2 interface and you apply a new IP access
list or MAC access list to the interface, the new ACL replaces the previously configured one.
Note
Router ACLs
You can apply router ACLs on switch virtual interfaces (SVIs), which are Layer 3 interfaces to VLANs; on
physical Layer 3 interfaces; and on Layer 3 EtherChannel interfaces. You apply router ACLs on interfaces
for specific directions (inbound or outbound). You can apply one router ACL in each direction on an interface.
The switch supports these access lists for IPv4 traffic:
•
Standard IP access lists use source addresses for matching operations.
•
Extended IP access lists use source and destination addresses and optional protocol type information
for matching operations.
As with port ACLs, the switch examines ACLs associated with features configured on a given interface. As
packets enter the switch on an interface, ACLs associated with all inbound features configured on that interface
are examined. After packets are routed and before they are forwarded to the next hop, all ACLs associated
with outbound features configured on the egress interface are examined.
ACLs permit or deny packet forwarding based on how the packet matches the entries in the ACL, and can be
used to control access to a network or to part of a network.
VLAN Maps
Use VLAN ACLs or VLAN maps to access-control all traffic. You can apply VLAN maps to all packets that
are routed into or out of a VLAN or are bridged within a VLAN in the switch or switch stack.
Use VLAN maps for security packet filtering. VLAN maps are not defined by direction (input or output).
You can configure VLAN maps to match Layer 3 addresses for IPv4 traffic.
All non-IP protocols are access-controlled through MAC addresses and Ethertype using MAC VLAN maps.
(IP traffic is not access controlled by MAC VLAN maps.) You can enforce VLAN maps only on packets
going through the switch; you cannot enforce VLAN maps on traffic between hosts on a hub or on another
switch connected to this switch.
With VLAN maps, forwarding of packets is permitted or denied, based on the action specified in the map.
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
110 OL-29434-01
Configuring IPv4 ACLs
Supported ACLs
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