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Access Control Lists (ACLs)
This chapter describes access control lists (ACLs), prefix lists, and route-maps.
The S5000 switch supports:
Access control lists (ACLs)
Ingress IP and MAC ACLs
Egress IP and MAC ACLs
At their simplest, access control lists (ACLs), prefix lists, and route-maps permit or deny traffic based on MAC and/or IP
addresses. This chapter describes implementing IP ACLs, IP prefix lists and route-maps. For MAC ACLS, refer to Layer 2.
An ACL is essentially a filter containing some criteria to match (examine IP, transmission control protocol [TCP], or user
datagram protocol [UDP] packets) and an action to take (permit or deny). ACLs are processed in sequence so that if a packet
does not match the criterion in the first filter, the second filter (if configured) is applied. When a packet matches a filter, the
switch drops or forwards the packet based on the filters specified action. If the packet does not match any of the filters in the
ACL, the packet is dropped (implicit deny).
The number of ACLs supported on a system depends on your content addressable memory (CAM) size. For more information,
refer to CAM Allocation and CAM Optimization.
Topics:
IP Access Control Lists (ACLs)
CAM Allocation and CAM Optimization
Implementing ACLs on Dell Networking OS
IP Fragment Handling
Configure a Standard IP ACL
Configure an Extended IP ACL
Established Flag
Configure Layer 2 and Layer 3 ACLs
Assign an IP ACL to an Interface
Configure Ingress ACLs
Configure Egress ACLs
Configure ACLs to Loopback
Applying an ACL on Loopback Interfaces
IP Prefix Lists
Creating a Prefix List
ACL Resequencing
Route Maps
IP Access Control Lists (ACLs)
In Dell Networking switch/routers, you can create two different types of IP ACLs: standard or extended.
A standard ACL filters packets based on the source IP packet. An extended ACL filters traffic based on the following criteria:
IP protocol number
Source IP address
Destination IP address
Source TCP port number
Destination TCP port number
Source UDP port number
Destination UDP port number
For more information about ACL options, refer to the Dell Networking OS Command Line Reference Guide.
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