Downloadable ACL

Feature History for Downloadable ACL

This table provides release and related information about the feature explained in this section.

This feature is also available in all the releases subsequent to the one in which they are introduced in, unless noted otherwise.

Table 1. Feature History for Downloadable ACL

Release

Feature

Feature Information

Cisco IOS XE Dublin 17.10.1

Downloadable ACL

The Downloadable ACL (dACL) feature defines and updates access control lists (ACLs) in one place (Cisco ISE) and allows ACL download to all the applicable controllers.

In Cisco IOS-XE 17.8 and earlier releases, you had to configure the name in Cisco ISE and define the ACL individually in each of the controllers.

Information About Downloadable ACL

ACLs are used to restrict network access to some users or devices based on predefined criteria. These criteria are specified as a list of Access Control Entries (ACEs).

Each ACE has a matching condition based on packet header fields as follows:

  • IP addresses

  • ports

  • protocols

  • combination of IP addresses, ports, and protocols

  • Result (permit or deny)

ACLs are applied to a controller on a per wireless client basis. Typically, you can configure ACLs in a controller itself. However, you can also configure ACLs to a connected Cisco ISE server and download them to the controller when a wireless client joins. Such ACLs are referred to as downloadable ACLs, per-user Dynamic ACLs, or dACLs.

Downloadable ACLs are easy to maintain because they define or update ACLs in Cisco ISE and can be downloaded to all the applicable controllers. (In Cisco IOS-XE 17.8 and earlier releases, you had to configure the name in Cisco ISE and define the ACL individually in each of the controllers.)

Scale Considerations for Downloadable ACL

The following table provides the ACL scale numbers for controllers.

Table 2. ACL Scale for Controllers

Controllers

ACL Scale

Cisco Catalyst 9800-40 Wireless Controller (small or medium)

Supports 128 ACLs with 128 ACEs.

Cisco Catalyst 9800-80 Wireless Controller (large)

Supports 256 ACLs and 256 ACEs.

Guidelines and Restrictions for Downloadable ACL

  • dACL does not support FlexConnect local switching.

  • IPv6 dACLs are supported only in Cisco ISE 3.0 or a later release.

Configuring dACL in a Controller (CLI)

Before you begin

  • You should have configured the RADIUS server.

  • You should have configured the aaa-override command in the policy profile. For more information, see Configuring AAA for Local Authentication (CLI).

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

wireless profile policy policy-profile-name

Example:

Device(config)# wireless profile policy named-policy-profile_4

Configures the wireless profile policy.

Step 3

aaa-override

Example:

Device(config-wireless-policy)# aaa-override

Configures AAA override to apply policies coming from the Cisco ISE servers.

Step 4

no shutdown

Example:

Device(config-wireless-policy)# no shutdown

Enables the profile policy.

Configuring Explicit Authorization Server List (CLI)

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters global configuration mode.

Step 2

radius server server-name

Example:

Device(config)# radius server Test-SERVER2

Specifies the RADIUS server name.

Step 3

address ipv4 ip-address

Example:

Device(config-radius-server)# address ipv4 124.3.52.62

Specifies the RADIUS server parameters.

Step 4

pac key key

Example:

Device(config-radius-server)# pack key cisco

Specify the authorization and encryption key used between the Device and the key string RADIUS daemon running on the RADIUS server.

Step 5

exit

Example:

Device(config-radius-server)# exit

Returns to the configuration mode.

Step 6

aaa group server radius server-group-name

Example:

Device(config)# aaa group server radius authz-server-group

Creates a radius server-group identification.

Note

 

server-group refers to the server group name. The valid range is from 1 to 32 alphanumeric characters.

Step 7

aaa authorization network authorization-list group server-group-name

Example:

Device(config)# aaa authorization network authZlist group authz-server-group

Creates an authorization method list for web-based authorization.

Note

 

You must use the already created authorization method list.

Step 8

end

Example:

Device(config)# end

Returns to privileged EXEC mode.

Verifying dACL Configuration

To verify the dACL, use the following command:

Device# show wireless client mac-address <client_mac> detail
Local Policies:
  	Service Template : wlan_svc_named-policy-profile_1_local (priority 254)
  		VLAN             : 16
  		Absolute-Timer   : 1800
  Server Policies:
  		ACS ACL          : xACSACLx-IP-tftpv4_2-62de6299
  		ACS ACL          : xACSACLx-IPV6-tftpv6_2-62de8087
  Resultant Policies:
  		ACS ACL          : xACSACLx-IP-tftpv4_2-62de6299
  		ACS ACL          : xACSACLx-IPV6-tftpv6_2-62de8087
  		VLAN Name        : VLAN0016
  		VLAN             : 16
  		Absolute-Timer   : 1800

To verify dACLs, use the following commands:

Device# show ip access-lists xACSACLx-IP-tftpv4_2-62de6299
Extended IP access list xACSACLx-IP-tftpv4_2-62de6299
    1 deny ip any host 9.8.29.13
    2 permit ip any any (58 matches)

Device# show ipv6 access-list xACSACLx-IPV6-tftpv6_2-62de8087
IPv6 access list xACSACLx-IPV6-tftpv6_2-62de8087
    deny ipv6 any host 2001:9:8:29:3AAD:A27A:973A:97CC sequence 1
    permit ipv6 any any (2 matches) sequence 2

To view all the downloaded dACLs, use the following command:

Device# show ip access-lists