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Can ACL be applied to switch?
Port ACLs. Port ACLs are ACLs that are applied to Layer 2 interfaces on a switch. Port ACLs are supported only on physical interfaces and not on EtherChannel interfaces and can be applied only on interfaces in the inbound direction.
What is Port ACL?
The port ACL (PACL) feature provides the ability to perform access control on specific Layer 2 ports. A Layer 2 port is a physical LAN or trunk port that belongs to a VLAN. Port ACLs are applied only on the ingress traffic.
On which of the following interfaces can a port ACL be applied?
ingress traffic
Port ACLs are applied only on the ingress traffic. The port ACL feature is supported only in hardware (port ACLs are not applied to any packets routed in software). When you create a port ACL, an entry is created in the ACL TCAM.
What does a standard ACL make decisions on?
Standard ACLs: Standard IP ACLs follow a simple logic and can only filter traffic based on IP source address, network or subnet. They use only the source IP address in an IP packet as the condition test. All decisions are made based on the source IP address.
How does ACL VLAN work?
VLAN ACL (also called VLAN map) provides packet filtering for all types of traffic that are bridged within a VLAN or routed into or out of the VLAN. Unlike Router ACL, VACL is not defined by a direction (input or output). All packets entering the VLAN (bridged or routed) are checked against the VACL.
What’s the difference between router ACL and Port ACL?
Port ACL. Port ACLs are similar to Router ACLs but are supported on physical interfaces and configured on Layer 2 interfaces on a switch. Port ACL supports only inbound traffic filtering. Port ACL can be configured as three type access lists: standard, extended, and MAC-extended.
What kind of ACL do I need for my switch?
The switch supports the following four types of ACLs for traffic filtering: 1 Router ACL. As the name implies, Router ACLs are similar to the IOS ACL discussed in Chapter 2, “Access Control,” and can be used to filter network 2 Port ACL. 3 VLAN ACL (VACL) 4 MAC ACL.
Is the Cisco IOS ACL compatible with pacls?
If the packet is Layer 3 forwarded and is permitted by the VACL, it is filtered by the Cisco IOS ACL on the same VLAN. The same process happens in reverse in the egress direction. However, there is currently no hardware support for output PACLs.
Can a Cisco IOS ACL be merged with a VACL?
In prefer port mode, Cisco IOS ACL R1 and VACL V1 are ignored. In merge mode, Cisco IOS ACL R1, VACL V1 and PACL P1 are merged and applied on the port. Note The CLI syntax for creating a PACL is identical to the syntax for creating a Cisco IOS ACL.