Overview of the Intelligent Wireless Access Gateway

Service providers use a combination of WiFi and mobility offerings to offload their mobility networks in the area of high-concentration service usage. This led to the evolution of the Intelligent Wireless Access Gateway (iWAG).

The iWAG provides a WiFi offload option to 4G and 3G service providers by enabling a single-box solution that provides the combined functionality of Proxy Mobile IPv6 (PMIPv6) and GPRS Tunneling Protocol (GTP) on the Cisco Intelligent Services Gateway (Cisco ISG) framework. This document provides information about the iWAG and how to configure it, and contains the following sections:

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.

Prerequisites for the iWAG

  • Enable mobile client service abstraction (MCSA).

  • Enable the ipv6 unicast-routing command.

Restrictions for the iWAG

  • Roaming from a 3G mobility network to a WLAN is not supported for the GTP and Cisco ISG sessions.
  • IP subscriber-routed (L3) sessions are not supported.
  • IPv6 and quality of service (QoS) are not supported in a 3G mobility network.
  • Only newly established calls are offloaded to the WLAN Third-Generation Partnership Project (3GPP) IP access.
  • The iWAG solution for WLAN offload is currently available only for the 3G Universal Mobile Telecommunications System (UMTS).

Information About the iWAG

The iWAG deployment includes a combination of simple IP users (traditional ISG and WiFi) and mobile IP users (PMIPv6 or GTP tunneling). The term mobility service is used to refer to either the GTP service or the PMIPv6 service applied to user traffic. The iWAG provides mobility services to mobile IP users, and as a result, a mobile client can seamlessly access a 3G or 4G mobility network. However, the iWAG does not provide mobility services to simple IP users. Therefore, simple IP users can access the Public Wireless LAN (PWLAN) network through the Cisco ISG. Clients are devices that access WiFi Internet (public wireless), where possible. However, if WiFi is not available, the same clients can

connect to the Internet service using a 3G or 4G mobility network.

The iWAG has a transport or switching element with Cisco ISG subscriber awareness. The iWAG also has RADIUS-based authentication and accounting, and policy-based subscriber routing for the WiFi wholesale model.

For more information about the iWAG, see the Overview of iWAG video.

The following figure shows a deployment model of the iWAG on a Cisco ASR 1000 Series Aggregation Services Router.

Figure 1. iWAG Deployment on a Cisco ASR 1000 Series Aggregation Services Router

Benefits of the iWAG

The iWAG offers the following benefits for mobile operators:

  • Reduces network congestion by reducing OpEx and increasing network efficiency by offloading 3G and 4G traffic.

  • Provides access to 3G and 4G core inspite of a lack of or weak cell signal, leading to subscriber retention.

  • Lowers CapEx on per user basis or bandwidth basis in dense metro environments.

The iWAG offers the following benefits for wireline and WiFi operators:

  • Provides WiFi security and subscriber control. Delivers scalable, manageable, and secure wireless connectivity.

  • Enables new revenue-sharing business models, such as Mobile Virtual Network Operators (MVNO) and others.

  • Delivers a WiFi platform that offers new location-based services.

The iWAG offers the following benefits for subscribers:

  • Provides enhanced quality of experience to subscribers on WiFi networks.

  • Provides unified billing across access networks.

  • Provides mobility across radio access technologies—3G or 4G to WiFi and WiFi to WiFi.

  • Provides multiple options within the WiFi platform, thereby enabling location-based services.

AAA Attributes

The following table lists the authentication, authorization, and accounting (AAA) attributes required for the iWAG configuration:


Note

The following indicate the availability of the attributes:

C: Conditional

M: Mandatory

O: Optional

N: Not present

Table 1 iWAG AAA Attributes

Attrib

ute

/Subattri

bute

Attri

bute

Name

Value Description ARq1 AA2 ARj3 AS4 CoA5
1

User Name

String Network Access Identifier M M M O C
4

NAS-IP

-Address

String IP address of the MAG M N N M O
31

Calling-

Station-ID

String MAC address of the mobile node M M M M M

26/

10415/

1

3GPP-

IMSI

String 3GPP IMSI N O N N O

26/

10415

/13

3GPP

-Charging

-Characteristics

String Rules for producing charging information N O N O O

26

/9

/1

Cisco-Service

-Selection

String Service Identifier (APN) N C N N C

26

/9

/1

Cisco

-Mobile

-Node

-Identifier

String Mobile Node Identifier N M N M C

26

/9/1

Cisco

-WLAN

-SSID

String SSID of the Access Point C N N C N
26/9/1

Cisco

-MSISDN

String Mobile Subscriber ISDN number N C N C C
26/9/1

Cisco-MN

-Service

ENUM

  • none

  • ipv4

  • ipv6

  • dual

Mobile Node Service type N M N M O
26/9/1

Cisco-MPC

-Protocol

-Interface

ENUM

  • none

  • pmipv6

  • gtpv1

  • pmipv4

Protocol Interface to be used for interfacing with MPC N M N O O
26/9/1

Cisco

-Multihoming

-Support

Binary True/False: Multihoming support for mobile node N O N N O
26/9/1

Cisco

-Uplink

-GRE

-Key

Integer 32-bit GRE Key to be used on the uplink path (4-octet hex encoding) N O N N O
26/9/1

Cisco

-Downlink

-GRE

-Key

Integer 32-bit GRE Key to be used on the downlink path (4-octet hex encoding) N O N N O
26/9/1

Cisco

-Home

-LMA

-IPv6

-Address

String Mobile node's Home LMA IPv6 address N C N N O
26/9/1

Cisco

-Visited

-LMA

-IPv6

-Address

String Mobile node's Visited LMA IPv6 address N C N N O
26/9/1

Cisco

-Home

-LMA

-IPv4

-Address

IPv4 Address Mobile node's Home LMA IPv4 address N C N N O
26/9/1

Cisco

-Visited

-LMA

-IPv4

-Address

IPv4 Address Mobile node's Visited LMA IPv4 address N C N N O
26/9/1

Cisco

-Home

-IPv4

-Home

-Address

IPv4 Address Mobile node's Visited LMA IPv4 address N O N N C
26/9/1

Cisco

-Visited

-IPv4

-Home

-Address

IPv4 Address Mobile node's Visited IPv4 address N O N N C

26

/10415

/5

THREEGENPP

_GPRS

_QOS

_PROFILE

String GRPS QoS Profile N O N N N

26

/10415

/7

THREEGENPP

_GGSN

_ADDRESS

IPv4 Address GGSN's Address N O N N N
26/9/1

Cisco

-Access

-Vrf

-Id

String Access-side VRF ID N O N N N
26/9/1

Cisco

-Apn

-Vrf

-Id

IPv4 Address GGSN's IPv4 address N O N N N
1 Access Request
2 Access Accept
3 Access Reject
4 Accounting Start
5 Change of Authorization

Supported Hardware and Software Compatibility Matrix for the iWAG

Chassis RP Memory ESP

Cisco ASR 1001 Router

Integrated RP with 16 GB

Integrated

Cisco ASR 1002-X Router

Integrated RP with 16 GB

Integrated

Cisco ASR 1004 Router

RP2 16 GB

ESP-40G

Cisco ASR 1006 Router and Cisco ASR 1013 Router offering duplex RP or ESP setup

RP2 16 GB

ESP-40G

Cisco ASR 1006 Router and Cisco ASR 1013 Router offering duplex RP or ESP setup

RP2 16 GB

ESP-100G

For information about the field-replaceable units (FRUs) of the Cisco ASR 1000 Series Aggregation Services Routers supported by each ROMmon release, see the "ROMmon Release Requirements" section in the Cisco ASR 1000 Series Aggregation Services Routers Release Notes.

How to Configure the iWAG

Configuring the iWAG for Simple IP Users

You must configure the Cisco Intelligent Services Gateway (ISG) for the iWAG to enable simple IP users to access Internet services.

The tasks listed below enable IP sessions and indicate how these sessions are identified. For detailed steps, see the "Creating ISG Sessions for IP Subscribers" section in the Intelligent Services Gateway Configuration Guide.

  • Creating ISG IP interface sessions

  • Creating ISG Static Sessions

  • Creating ISG IP Subnet Sessions

  • Configuring IP Session Recovery for DHCP-Initiated IP Sessions

  • Verifying ISG IP Subscriber Sessions

  • Clearing ISG IP Subscriber Sessions

  • Troubleshooting ISG IP Subscriber Sessions

You must configure DHCP support in your network before performing the tasks listed below. For detailed steps on assigning IP addresses using DHCP, see the "Assigning ISG Subscriber IP Addresses by Using DHCP" section in the Intelligent Services Gateway Configuration Guide.

  • Configuring an ISG Interface for Dynamic DHCP Class Association

  • Configuring DHCP Server User Authentication

  • Configuring a DHCP Class in a Service Policy Map

  • Configuring a DHCP Class in a Service Profile or User Profile on the AAA Server

  • Configuring a DHCP Server IP Address

Configuring the iWAG for 3G Mobile IP Users

You must configure GTP for the iWAG to allow access to 3G mobile IP users. The various tasks described in the following sections are mandatory for configuring the iWAG for 3G mobile IP users.

Configuring Authentication, Authorization, and Accounting for the iWAG

This section describes how to configure authentication, authorization, and accounting (AAA) for the iWAG on the Cisco ASR 1000 Series Aggregation Services Routers.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    aaa new-model

    4.    aaa group server radius group-name

    5.    server-private ip-address [auth-port port-number | acct-port port-number ] [non-standard] [timeout seconds ] [retransmit retries ] [ key string]

    6.    aaa authentication login {default | list-name} { [passwd-expiry] method1 [method2...]}

    7.    aaa authorization network authorization-name group server-group name

    8.    aaa authorization subscriber-service {default {cache | group | local} | list-name} method1 [method2...]

    9.    aaa accounting{auth-proxy| system | network | exec | connection | commands level | dot1x} { {default | list-name } [vrf vrf-name] {start-stop | stop-only | none} [broadcast] group group-name

    10.    action-type {none | start-stop | stop-only}

    11.    group {tacacs+ server-group}

    12.    aaa accounting {auth-proxy | system | network | exec | connection | commands level | dot1x } {default |list-name } [vrf vrf-name ] {start-stop | stop-only | none} [broadcast] group group-name


DETAILED STEPS
     Command or ActionPurpose
    Step 1enable


    Example:
    Router# enable
     

    Enables the privileged EXEC mode.

    Enter your password, if prompted.

     
    Step 2configure terminal


    Example:
    Router# configure terminal
     

    Enters the global configuration mode.

     
    Step 3aaa new-model


    Example:
    Router(config)# aaa new-model
     

    Enables the AAA access control model.

     
    Step 4 aaa group server radius group-name


    Example:
    Router(config)# aaa group server radius AAA_SERVER_CAR
     

    Groups different RADIUS server hosts into distinct lists and methods.

     
    Step 5server-private ip-address [auth-port port-number | acct-port port-number ] [non-standard] [timeout seconds ] [retransmit retries ] [ key string]


    Example:
    Router(config-sg-radius)# server-private 5.3.1.76 auth-port 2145 acct-port 2146 key cisco
     

    Configures the IP address of the private RADIUS server for the group server.

     
    Step 6 aaa authentication login {default | list-name} { [passwd-expiry] method1 [method2...]}


    Example:
    Router(config-sg-radius)# aaa authentication login default none
     

    Sets AAA authentication at login.

     
    Step 7aaa authorization network authorization-name group server-group name


    Example:
    Router(config)# aaa authorization network ISG_PROXY_LIST group AAA_SERVER_CAR
     

    Runs authorization for all network-related service requests.

     
    Step 8 aaa authorization subscriber-service {default {cache | group | local} | list-name} method1 [method2...]


    Example:
    Router(config)# aaa authorization subscriber-service default local group AAA_SERVER_CAR
     

    Specifies one or more AAA authorization methods for the Cisco ISG to provide subscriber service.

     
    Step 9aaa accounting{auth-proxy| system | network | exec | connection | commands level | dot1x} { {default | list-name } [vrf vrf-name] {start-stop | stop-only | none} [broadcast] group group-name


    Example:
    Router(config)# aaa accounting network PROXY_TO_CAR
     

    Enables AAA accounting of requested services for billing and security purposes when either the RADIUS server or the TACACS+ server is used.

     
    Step 10action-type {none | start-stop | stop-only}


    Example:
    Router(cfg-acct-mlist)# action-type start-stop
     

    Enables the type of actions to be performed on accounting records.

     
    Step 11 group {tacacs+ server-group}


    Example:
    Router(cfg-preauth)# group AAA_SERVER_CAR
     

    Specifies the AAA TACACS+ server group to use for preauthentication.

     
    Step 12aaa accounting {auth-proxy | system | network | exec | connection | commands level | dot1x } {default |list-name } [vrf vrf-name ] {start-stop | stop-only | none} [broadcast] group group-name


    Example:
    Router(config)# aaa accounting network ISG_PROXY_LIST start-stop group AAA_SERVER_CAR
     

    Enables AAA accounting of requested services for billing and security purposes when you use either the RADIUS server or the TACACS+ server.

     

    Configuring DHCP when the iWAG Acts as a DHCP Proxy

    This section describes how to configure the Dynamic Host Configuration Protocol (DHCP) for the iWAG solution when the iWAG acts as a DHCP proxy.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    ip dhcp excluded-address [vrf vrf-name] ip-address

      4.    ip dhcp pool pool-name

      5.    network network-number [ mask [secondary] | /prefix-length [secondary]

      6.    default-router ip-address [last-ip-address]

      7.    domain-name domain

      8.    lease {days [hours [ minutes ]] | infinite}


    DETAILED STEPS
       Command or ActionPurpose
      Step 1enable


      Example: 
      Router> enable
       

      Enables the privileged EXEC mode.

      Enter your password, if prompted.

       
      Step 2 configure terminal


      Example: 
      Router# configure terminal
       

      Enters the global configuration mode.

       
      Step 3ip dhcp excluded-address [vrf vrf-name] ip-address


      Example: 
      Router(config)# ip dhcp excluded-address 192.168.10.1
       

      Specifies the IP address that a DHCP server should not assign to DHCP clients.

       
      Step 4ip dhcp pool pool-name


      Example: 
      Router(config)# ip dhcp pool test
       

      Configures a DHCP address pool on a DHCP server and enters the DHCP pool configuration mode.

       
      Step 5 network network-number [ mask [secondary] | /prefix-length [secondary]


      Example: 
      Router(dhcp-config)# network 192.168.0.0 255.255.0.0
       

      Configures the network number and mask for a DHCP address pool primary subnet or DHCP address pool secondary subnet on a Cisco IOS DHCP server.

       
      Step 6 default-router ip-address [last-ip-address]


      Example: 
      Router(dhcp-config)# default-router 192.168.10.1
       

      Specifies the default router list for a DHCP client.

       
      Step 7domain-name domain


      Example: 
      Router(dhcp-config)# domain-name example.com
       

      Specifies the domain name for a DHCP client.

       
      Step 8lease {days [hours [ minutes ]] | infinite}


      Example: 
      Router(dhcp-config)# lease 1 2 2
       
      Configures the duration of the lease for an IP address that is assigned from a Cisco IOS DHCP server to a DHCP client.
      Note    The DHCP pool lease time is applicable only to simple sessions. For mobile GTP sessions, lease time from the GTP configuration will be used. Under the GTP configuration, lease duration should be configured the same way as the address hold timer in the GGSN or PGW.
       

      Configuring the Cisco ISG Class Map and Policy Map for the iWAG

      This section describes how to configure the Cisco ISG class map and policy map for the iWAG.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    class-map type traffic match-any class-map-name

        4.    match access-group output {access-group | name access-group-name}

        5.    match access-group input {access-group | name access-group-name}

        6.    policy-map type service policy-map-name

        7.    [ priority ] class type traffic {class-map-name | default {in-out | input | output } }

        8.    accounting aaa list aaa-method-list

        9.    [ priority ] class type traffic { class-map-name | default {in-out | input | output}}

        10.    drop

        11.    policy-map type control policy-map-name

        12.    class type control control-class-name | always} [event{access-reject | account-logoff | account-logon | acct-notification | credit-exhausted | dummy-event | quota-depleted | radius-timeout | service-failed | service-start | service-stop | session-default-service | session-restart | session-service-found | session-start | timed-policy-expiry}]

        13.    action-number service-policy type service [unapply] [aaa list list-name ] { name service-name | identifier {authenticated-domain | authenticated-username | dnis | nas-port | tunnel-name | unauthenticated-domain | unauthenticated-username }}

        14.    action-number authorize[aaa{list-name | list { list-name | default}} [password password]] [upon network-service-found {continue | stop}] [use method authorization-type] identifier identifier-type [plus identifier-type]


      DETAILED STEPS
         Command or ActionPurpose
        Step 1enable


        Example:
        Router> enable
         

        Enables the privileged EXEC mode.

        Enter your password, if prompted.

         
        Step 2configure terminal


        Example:
        Router# configure terminal
         

        Enters the global configuration mode.

         
        Step 3class-map type traffic match-any class-map-name


        Example:
        Router(config)# class-map type traffic match-any TC_OPENGARDEN
         

        Creates or modifies a traffic class map that is used for matching packets to a specified Cisco ISG traffic class.

         
        Step 4match access-group output {access-group | name access-group-name}


        Example:
        Router(config-traffic-classmap)# match access-group output name ACL_OUT_OPENGARDEN
         

        Configures the match criteria for a Cisco ISG traffic class map on the basis of the specified access control list (ACL).

         
        Step 5match access-group input {access-group | name access-group-name}


        Example:
        Router(config-traffic-classmap)# match access-group input name ACL_IN_OPENGARDEN
         

        Configures the match criteria for a Cisco ISG traffic class map on the basis of the specified ACL.

         
        Step 6policy-map type service policy-map-name


        Example:
        Router(config)# policy-map type service OPENGARDEN_SERVICE
         

        Creates or modifies a service policy map that is used to define a Cisco ISG subscriber service.

         
        Step 7[ priority ] class type traffic {class-map-name | default {in-out | input | output } }


        Example:
        Router(config-service-policymap)# 20 class type traffic TC_OPENGARDEN
         

        Creates or modifies a traffic class map that is used for matching packets to a specified Cisco ISG traffic class.

         
        Step 8accounting aaa list aaa-method-list


        Example:
        Router(config-service-policymap)# accounting aaa list PROXY_TO_CAR
         

        Enables Cisco ISG accounting and specifies an AAA method list to which accounting updates are forwarded.

         
        Step 9 [ priority ] class type traffic { class-map-name | default {in-out | input | output}}


        Example:
        Router(config-service-policymap)# class type traffic default in-out
         

        Creates or modifies a traffic class map that is used for matching packets to a specified Cisco ISG traffic class.

         
        Step 10drop


        Example:
        Router(config-service-policymap)# drop
         

        Configures a Cisco ISG to discard packets belonging to the default traffic class.

         
        Step 11policy-map type control policy-map-name


        Example:
        Router(config)# policy-map type control BB_PROFILE
         

        Creates or modifies a control policy map that defines a Cisco ISG control policy.

         
        Step 12class type control control-class-name | always} [event{access-reject | account-logoff | account-logon | acct-notification | credit-exhausted | dummy-event | quota-depleted | radius-timeout | service-failed | service-start | service-stop | session-default-service | session-restart | session-service-found | session-start | timed-policy-expiry}]


        Example:
        Router (config-control-policymap)# class type control always event session-start
         

        Specifies a control class for which actions can be configured in a Cisco ISG control policy.

         
        Step 13 action-number service-policy type service [unapply] [aaa list list-name ] { name service-name | identifier {authenticated-domain | authenticated-username | dnis | nas-port | tunnel-name | unauthenticated-domain | unauthenticated-username }}


        Example:
        Router(config-control-policymap-class-control)# 10 service-policy type service name OPENGARDEN_SERVICE
         

        Activates a Cisco ISG service.

         
        Step 14action-number authorize[aaa{list-name | list { list-name | default}} [password password]] [upon network-service-found {continue | stop}] [use method authorization-type] identifier identifier-type [plus identifier-type]


        Example:
        Router(config-control-policymap-class-control)# 20 authorize aaa list ISG_PROXY_LIST password cisco identifier mac-address
         

        Initiates a request for authorization based on a specified identifier in a Cisco ISG control policy.

         

        Configuring a Session Initiator for the iWAG

        This section describes how to configure a session initiator for the iWAG solution. A session can be created using different triggers, such as an unknown MAC address, an unclassified MAC address, a RADIUS message with the Cisco ASR 1000 Series Aggregation Services Router acting as RADIUS proxy or a DHCP DISCOVER message with the Cisco ASR 1000 Series Aggregation Services Router acting as DHCP proxy.


        Note
        To enable roaming, one initiator is required for DHCP sessions and another for the unclassified MAC.

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    interface GigabitEthernet slot/subslot/port

          4.    description string

          5.    ip address ip-address mask [secondary [vrf vrf-name]]

          6.    negotiation auto

          7.    service-policy type control policy-map-name

          8.    ip subscriber {l2-connected}

          9.    initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address}

          10.    initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address}


        DETAILED STEPS
           Command or ActionPurpose
          Step 1enable


          Example:
          Router> enable
           

          Enables the privileged EXEC mode.

          Enter your password, if prompted.

           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters the global configuration mode.

           
          Step 3 interface GigabitEthernet slot/subslot/port


          Example:
          Router(config)# interface GigabitEthernet 1/3/3
           

          Enters the interface configuration mode for Gigabit Ethernet.

           
          Step 4 description string


          Example:
          Router(config-if)# description access interface connected to subscriber
           

          Adds a description to an interface configuration.

           
          Step 5ip address ip-address mask [secondary [vrf vrf-name]]


          Example:
          Router(config-if)# ip address 192.171.10.1  255.255.0.0
           

          Sets a primary IP address or secondary IP address for an interface.

           
          Step 6negotiation auto


          Example:
          Router(config-if)# negotiation auto
           

          Enables auto negotiation on a Gigabit Ethernet interface.

           
          Step 7service-policy type control policy-map-name


          Example:
          Router(config-if)# service-policy type control BB_Profile
           

          Applies a control policy to a context.

           
          Step 8ip subscriber {l2-connected}


          Example:
          Router(config-if)# ip subscriber l2-connected
           

          Enables Cisco ISG IP subscriber support on an interface and specifies the access method that IP subscribers use for connecting to the Cisco ISG on an interface.

          Note   

          The iWAG does not support the routed access method.

           
          Step 9 initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address}


          Example:
          Router(config-subscriber)# initiator unclassified mac-address
           

          Enables the Cisco ISG to create an IP subscriber session upon receipt of a specified type of packet.

           
          Step 10initiator {dhcp | radius-proxy | static ip subscriber list listname | unclassified ip | unclassified mac-address}


          Example:
          Router(config-subscriber)# initiator dhcp
           

          Enables the Cisco ISG to create an IP subscriber session upon receipt of a specified type of packet.

           

          Configuring a GGSN-Facing Interface for the iWAG

          This section describes how to configure a GGSN-facing interface between the iWAG solution and the GGSN.

          SUMMARY STEPS

            1.    enable

            2.    configure terminal

            3.    interface GigabitEthernet slot/subslot/port

            4.    description string

            5.    ip address ip-address mask [secondary [vrf vrf-name ]]

            6.    negotiation auto


          DETAILED STEPS
             Command or ActionPurpose
            Step 1enable


            Example: 
            Router> enable
             

            Enables the privileged EXEC mode.

            Enter your password, if prompted.

             
            Step 2configure terminal


            Example: 
            Router# configure terminal
             

            Enters the global configuration mode.

             
            Step 3 interface GigabitEthernet slot/subslot/port


            Example: 
            Router(config)# interface GigabitEthernet 1/3/5
             

            Enters the interface configuration mode for Gigabit Ethernet interface.

             
            Step 4description string


            Example: 
            Router(config-if)#description interface connected to GGSN
             

            Adds a description to an interface configuration.

             
            Step 5 ip address ip-address mask [secondary [vrf vrf-name ]]


            Example: 
            Router(config-if)# ip address 192.170.10.1 255.255.0.0
             

            Sets a primary IP address or secondary IP address for an interface.

             
            Step 6negotiation auto


            Example: 
            Router(config-if)# negotiation auto
             

            Enables auto negotiation on a Gigabit Ethernet interface.

             

            Enabling Mobile Client Service Abstraction

            This section describes how to enable Mobile Client Service Abstraction (MCSA) for PMIPv6.

            Note

            Enabling MCSA is mandatory before you enable the Mobility feature in the Cisco ASR 1000 Series Aggregation Services Routers.

            SUMMARY STEPS

              1.    enable

              2.    configure terminal

              3.    mcsa

              4.    enable sessionmgr


            DETAILED STEPS
               Command or ActionPurpose
              Step 1enable


              Example: 
              Router> enable
               

              Enables the privileged EXEC mode.

              Enter your password, if prompted.

               
              Step 2 configure terminal


              Example: 
              Router# configure terminal
               

              Enters the global configuration mode.

               
              Step 3mcsa


              Example: 
              Router(config)# mcsa
               

              Enables MCSA on the Cisco ASR 1000 Series Aggregation Services Router.

               
              Step 4enable sessionmgr


              Example: 
              Router(config-mcsa)# enable sessionmgr
               

              Enables MCSA to receive notifications from the Cisco ISG.

               

              Configuring the GTP of the iWAG

              This section describes how to configure GTPv1 for the iWAG solution.

              Before You Begin

              Enable MCSA.

              SUMMARY STEPS

                1.    enable

                2.    configure terminal

                3.    gtp

                4.    n3-request number of requests

                5.    interval t3-response number of seconds

                6.    interval echo-request request-number

                7.    interface local GigabitEthernet slot/subslot/port

                8.    apn-name apn-name

                9.    ip address ggsn ip-address

                10.    default-gw address prefix-len value

                11.    dns-server ip-address

                12.    dhcp-server ip-address

                13.    dhcp-lease seconds


              DETAILED STEPS
                 Command or ActionPurpose
                Step 1enable


                Example: 
                Router> enable
                 

                Enables the privileged EXEC mode.

                Enter your password, if prompted.

                 
                Step 2configure terminal


                Example: 
                Router# configure terminal
                 

                Enters the global configuration mode.

                 
                Step 3gtp


                Example: 
                Router(config)# gtp
                 

                Configures the GTP for the iWAG solution on the Cisco ASR 1000 Series Aggregation Services Router.

                 
                Step 4n3-request number of requests


                Example: 
                Router(config-gtp)# n3-request 3
                 

                Specifies the number of times a control message must be retried before a failure message is sent. The default value is 5.

                 
                Step 5 interval t3-response number of seconds


                Example: 
                Router(config-gtp)# interval t3-response 10
                 

                Specifies the time interval, in seconds, for which the SGSN of the iWAG waits for a response for the control message sent. The default value is 1.

                 
                Step 6interval echo-request request-number


                Example: 
                Router(config-gtp)# interval echo-request 60
                 

                Specifies the time interval, in seconds, for which the SGSN of the iWAG waits for before sending an echo request message. The range is from 60 to 65535. The default value is 60. The value of 0 disables the Echo Request feature.

                 
                Step 7 interface local GigabitEthernet slot/subslot/port


                Example: 
                Router(config-gtp)# interface local GigabitEthernet 0/0/3
                 

                Configures the transport interface to communicate with the GGSN.

                 
                Step 8apn-name apn-name


                Example: 
                Router(config-gtp)# apn-name example.com
                 

                Configures an APN name string for GPRS load balancing.

                 
                Step 9 ip address ggsn ip-address


                Example: 
                Router(config-gtp-apn)# ip address ggsn 192.170.10.2
                 

                Sets the IP address for the GGSN.

                 
                Step 10default-gw address prefix-len value


                Example: 
                Router(config-gtp-apn)# default-gw 192.171.10.1 prefix-len 16
                 
                Specifies the default gateway address of the subscriber.
                Note    This is the default gateway address of the IP provided by the GGSN using GTP, and not the default gateway address on the physical local interface that the subscriber is connected to. They can be the same, but we recommend that they be two different subnets.
                 
                Step 11dns-server ip-address


                Example: 
                Router(config-gtp-apn)# dns-server 192.165.1.1
                 

                Specifies the Domain Name System (DNS) IP server that is available for a DHCP client.

                 
                Step 12dhcp-server ip-address


                Example: 
                Router(config-gtp-apn)# dhcp-server 192.168.10.1
                 

                Specifies the primary and backup DHCP server that is used to allocate IP addresses, the IP address can be a local iWAG interface address, to mobile station users entering a particular public data network (PDN) access point.

                 
                Step 13dhcp-lease seconds


                Example: 
                Router(config-gtp-apn)# dhcp-lease 3000
                 

                Configures the duration (in seconds) of the lease for an IP address that is assigned from a Cisco IOS DHCP Server to a DHCP client.

                 

                Configuring the iWAG for 4G Mobile IP Users

                Configuring PMIPv6 for the iWAG

                You must configure PMIPv6 for the iWAG to allow access to mobile IP users.

                The tasks listed below describe the procedures involved in configuring the Mobile Access Gateway. For detailed steps, see the "How to Configure Proxy Mobile IPv6 Support for MAG Functionality" section in the IP Mobility: PMIPv6 Configuration Guide, Cisco IOS XE Release 3S .

                • Configuring a Proxy Mobile IPv6 Domain by Using the Configuration from the AAA Server

                • Configuring the Minimum Configuration for a MAG to Function

                • Configuring a Detailed Configuration for a MAG when an AAA Server is not Available

                • Configuring a Minimum Configuration for a MAG

                • Configuring a Detailed Configuration for a MAG

                The tasks listed below describe the procedures involved in configuring Local Mobility Anchor. For detailed steps, see the "How to Configure Proxy Mobile IPv6 Support for LMA Functionality" section in the IP Mobility: PMIPv6 Configuration Guide, Cisco IOS XE Release 3S .

                • Configuring a Proxy Mobile IPv6 Domain by Using the Configuration from the AAA Server

                • Configuring a Minimum Configuration for a Domain When an AAA Server Is Not Available

                • Configuring a Detailed Configuration for a Domain When the AAA Server Is Not Available

                • Configuring a Minimum Configuration for an LMA

                • Configuring a Detailed Configuration for an LMA

                Enabling Mobile Client Service Abstraction

                This section describes how to enable Mobile Client Service Abstraction (MCSA) for PMIPv6.

                Note

                Enabling MCSA is mandatory before you enable the Mobility feature in the Cisco ASR 1000 Series Aggregation Services Routers.

                SUMMARY STEPS

                  1.    enable

                  2.    configure terminal

                  3.    mcsa

                  4.    enable sessionmgr


                DETAILED STEPS
                   Command or ActionPurpose
                  Step 1enable


                  Example: 
                  Router> enable
                   

                  Enables the privileged EXEC mode.

                  Enter your password, if prompted.

                   
                  Step 2 configure terminal


                  Example: 
                  Router# configure terminal
                   

                  Enters the global configuration mode.

                   
                  Step 3mcsa


                  Example: 
                  Router(config)# mcsa
                   

                  Enables MCSA on the Cisco ASR 1000 Series Aggregation Services Router.

                   
                  Step 4enable sessionmgr


                  Example: 
                  Router(config-mcsa)# enable sessionmgr
                   

                  Enables MCSA to receive notifications from the Cisco ISG.

                   

                  Additional References

                  Related Documents

                  Related Topic

                  Document Title

                  Cisco IOS commands

                  Cisco IOS Master Command List, All Releases

                  ISG concepts, configuration tasks, and examples

                  ISG Configuration Guide

                  ISG commands

                  Cisco IOS Intelligent Services Gateway Command Reference

                  iWAG commands

                  Cisco IOS Intelligent Wireless Access Gateway Command Reference

                  Mobile IP configuration concepts, tasks, and examples

                  IP Mobility: PMIPv6 Configuration Guide

                  IP Mobility commands

                  Cisco IOS IP Mobility Command Reference

                  GGSN configuration concepts, tasks, and examples

                  Mobile Wireless GGSN Configuration Guide

                  Standards and RFCs

                  Standard/RFC

                  Title

                  RFC 3775

                  Mobility Support in IPv6

                  RFC 5213

                  Proxy Mobile IPv6

                  RFC 5844

                  IPv4 Support for Proxy Mobile IPv6

                  RFC 5845

                  Generic Routing Encapsulation (GRE) Key Option for Proxy Mobile IPv6

                  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 and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

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

                  Feature Information for the Intelligent Wireless Access Gateway

                  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 2  Feature Information for the Intelligent Wireless Access Gateway

                  Feature Name

                  Releases

                  Feature Information

                  Intelligent Wireless Access Gateway

                  Cisco IOS XE Release 3.8S

                  The iWAG solution offers the following tunneling technologies to integrate WiFi access with the Evolved Packet Core (EPC):

                  • GPRS Tunnel Protocol version 1 (GTPv1) allows integration of a 3G environment, where iWAG behaves in a way that is similar to a Serving GPRS Support Node (SGSN) connecting to a Gateway GPRS Support Node (GGSN).

                  • Proxy Mobile IPv6 (PMIPv6) allows the integration of a 4G environment where iWAG behaves as a PMIPv6 Mobile Access Gateway (MAG) connecting to an Local Mobility Anchor (LMA) that is co-located with a Packet Gateway (PGW), which acts as PMIPv6 LMA.

                  In Cisco IOS XE Release 3.8S, this feature was implemented on the Cisco ASR 1000 Series Aggregation Services Routers.