VLAN ID Based Policy Control

The VLAN ID based policy control feature is used to segregate subscribers based on VLAN IDs. Service Set Identifier (SSID) is mapped to virtual local area network (VLAN), and hence VLAN-based segregation allows Intelligent Services Gateway(ISG) and Intelligent Wireless Access Gateway (iWAG) to detect subscribers connecting to open and secure SSID efficiently. In case of sessions where a NAS port ID is not available for segregation of the subscribers, (e.g. - Walk-By users), the VLAN ID can be used to segregate subscribers. This feature is specifically designed for Ethernet over Generic Routing Encapsulation (EoGRE) access where multiple VLANs get terminated on the same Tunnel Interface.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Restrictions for VLAN ID Based Policy Control

The VLAN ID Based Policy Control feature is applicable only to session-start and session-restart events in the control policy.

Information About VLAN ID Based Policy Control

With VLAN-based control policies, subscribers connecting through specific SSIDs can be identified with any packet (DHCP, ARP, Data Packet) based on VLANs, and respective policies or features can be applied during session start and restart. Multiple VLANs can be mapped to the same SSID with specific IP pools and subnets. IP address is allocated to WiFi subscriber device connecting through specific SSID/VLAN from respective subnet.

Multipoint Generic Routing Encapsulation (mGRE) Tunnels can map to multiple VLANs and all the VLAN may be terminated in the single EoGRE Tunnel. As a result, subscribers connecting to VLAN1 and VLAN2 will reach iWAG on the same access interface. It is necessary to identify such subscribers and apply a different control policy based on the VLAN IDs.

Configuring VLAN ID Based Policy Control

Perform this task to configure VLAN ID Based Policy Control feature.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    match vlan vlan_id

    4.    end


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable

    Example: 
    Router> enable
     

    Enables privileged EXEC mode. Enter your password when prompted.

     

    Step 2 configure terminal

    Example: 
    Router# configure terminal
     

    Enters global configuration mode.

     

    Step 3match vlan vlan_id

    Example: 
    Router(config)# match vlan 200
     

    Segregates subscribers based on VLAN IDs. When the VLAN ID-based control policy is applied under condition class map, different control policies are applied for different subscribers.

    Note   

    The no form of this command unconfigures the VLAN ID based control policy feature.

     

    Step 4 end

    Example: 
    Router(config)# end
     

    Returns the device to privileged EXEC mode.

     

    Configuration Examples for VLAN ID Based Policy Control

    Example: Defining a Default Control Policy

    policy-map type control EOGRE_WALKBY_RULE
 class type control SECURE_SSID_VLAN event session-start
  10 default-exit
 !
 class type control always event session-start
  .......
 !
 class type control always event timed-policy-expiry
  1 service disconnect
 !
!

    Example: Defining a Regular Control Policy

    policy-map type control EOGRE_POLICY_RULE
 class type control IP_UNAUTH_COND event timed-policy-
expiry
  10 service disconnect
 !
class type control SECURE_SSID_VLAN event session-start
  ......
 !
 class type control SECURE_SSID_VLAN event session-restart
...... !

 class type control always event session-start
  ....
 !
 class type control always event session-restart
...... !

    Example: Defining a Condition Map

    class-map type control match-any SECURE_SSID_VLAN
 match vlan 200
 match vlan 201

    Additional References

    Related Documents

    Related Topic

    Document Title

    Cisco IOS commands

    Cisco IOS Master Commands List, All Releases

    iWAG commands

    Cisco IOS Intelligent Wireless Access Gateway Command Reference

    MIBs

    MIB

    MIBs Link

    No new or modified MIBs are supported by this feature.

    To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

    http:/​/​www.cisco.com/​go/​mibs

    Technical Assistance

    Description

    Link

    The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

    To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

    Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

    http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

    Feature Information for VLAN ID Based Policy Control

    The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.
    Table 1 Feature Information for VLAN ID Based Policy Control

    Feature Name

    Releases

    Feature Information

    VLAN ID Based Policy Control

    Cisco IOS XE Release 3.15

    In Cisco IOS XE Release 3.15, this feature was implemented on the Cisco ASR 1000 Series Aggregation Services Routers.