PMIP Mobility - 3G Mobility Anchor

The 3G Mobility Anchor(3GMA) feature acts as an anchor point for 3G User Equipment (UE). 3GMA functions as the DHCP server for Gateway general packet radio service (GPRS) Support Node (GGSN)/Packet Data Serving Node (PDSN), and as a Local Mobility Anchor (LMA) towards Wi-Fi Mobile Access Gateway (MAG).

This module describes the 3G Mobility Anchor feature.

Finding Feature Information

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Prerequisites for 3G Mobility Anchor

You must configure the IPv4 and IPv6 address pools for the Local Mobility Anchor (LMA) to assign IPv4 or IPv6 addresses.

Information about PMIP Mobility - 3G Mobility Anchor

3G Mobility Anchor Overview

Third-generation Mobility Anchor (3GMA) is the default gateway for Packet Data Serving Node (PDSN)/General Packet Radio Service (GPRS) Support Node (GGSN). A 3GMA node is placed on Gi interface of the PDSN/GGSN to serve as an anchor point for 3G User Equipments (UEs). Gi interface is the reference point between a GPRS network and an external packet data network. 3GMA node works as a DHCP server towards GGSN/PDSN, and as an LMA towards a WiFi MAG. 3GMA node assigns an IP address and responds to DHCP messages from GGSN/PDSN. UEs are configured with a specific Access Point Names (APNs); when a UE connects to this APN, PDSN/ GGSN is configured to operate in Proxy DHCP mode, instead of using local address pool. In 3GMA mode, the IP address assigned to the mobile is obtained from an external DHCP server (3GMA node). Local Mobility Anchor (LMA) functionality described in RFC 5213 can also be configured in 3GMA mode.

Local Mobility Anchor

Local Mobility Anchor (LMA) is the home agent for a mobile node (MN) in a Proxy Mobile IPv6 (PMIPv6) domain. It is the topological anchor point for MN home network prefixes and manages the binding state of an MN. An LMA has the functional capabilities of a home agent as defined in the Mobile IPv6 base specification (RFC 3775) along with the capabilities required for supporting the PMIPv6 protocol.


Note

Use the dynamic mag learning command to enable LMA to accept Proxy Mobile IPv6 (PMIPv6) signaling messages from any Mobile Access Gateway (MAG) that is not configured locally.

Mobile Node

Mobile node (MN) is an IP host and the mobility of the MN is managed by a network. MN can be an IPv4-only node, an IPv6-only node, or a dual-stack node, which is a node with IPv4 and IPv6 protocol stacks. MN is not required to participate in any IP mobility-related signaling for achieving mobility for an IP address or a prefix that is obtained in the Proxy Mobile IPv6 (PMIPv6) domain.

Radio Access Technology Type

A radio access type (RAT) refers to the method of allocating radio resources in a wireless network for communication in the uplink (user to network) and downlink (network to user). RAT indicates the type of radio technology used to access a Core Network (CN), which is the central part of a telecommunication network that provides various services to customers who are connected by the access network. RAT is implemented by the radio access network (RAN) that resides between a device such as a mobile phone, a computer, or any remotely controlled machine, and provides connection with its CN. Mobile phones and other wireless connected devices are known as user equipment (UE). Examples of RAT types include Worldwide Interoperability for Microwave Access (WiMAX), Wireless Local Area Network (WLAN), and 3GPP

How to Configure PMIP Mobility - 3G Mobility Anchor

Configuring LMA in 3GMA Mode

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. ip local pool pool-name low-ip-address high-ip-address
  4. ipv6 local pool pool-name prefix/prefix-length assigned-length
  5. ipv6 unicast-routing
  6. ipv6 mobile pmipv6-lma lma-id domain domain-name
  7. address ipv6 ipv6-address
  8. network network1
  9. pool ipv4 pool-name pfxlen number
  10. pool ipv6 pool-name pfxlen number
  11. exit
  12. default profile profile-name
  13. role 3gma
  14. interface interface-type
  15. rat rat-type priority priority-number
  16. end
  17. show ipv6 mobile pmipv6 lma binding

DETAILED STEPS

  Command or Action Purpose
Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.
Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

ip local pool pool-name low-ip-address high-ip-address

Example:


Device(config)# ip local pool v4pool 209.165.201.1 209.165.201.10

Creates a local pool of IPv4 addresses.

Step 4

ipv6 local pool pool-name prefix/prefix-length assigned-length

Example:


Device(config)# ipv6 local pool v6pool 2001:0DB8::/32 64

Creates a local pool of IPv6 addresses.

Step 5

ipv6 unicast-routing

Example:


Device(config)# ipv6 unicast-routing

Enables IPv6 routing.

Step 6

ipv6 mobile pmipv6-lma lma-id domain domain-name

Example:


Device(config)# ipv6 mobile pmipv6-lma lma1 domain dn1

Enables the Local Mobility Anchor (LMA) service on the device, configures the Proxy Mobile IPv6 (PMIPv6) domain for the LMA, and enters LMA configuration mode.

Step 7

address ipv6 ipv6-address

Example:


Device(config-ipv6-pmipv6-lma)# address ipv6 2001:DB8::1

Configures an IPv6 address for the LMA.

Step 8

network network1

Example:


Device(config-ipv6-pmipv6-lma)# network network1

Associates a network, on which an IPv4 or IPv6 pool is configured, with the LMA, and enters LMA-network configuration mode.

Step 9

pool ipv4 pool-name pfxlen number

Example:


Device(config-ipv6-pmipv6lma-network)# pool ipv4 v4pool pfxlen 24

Specifies the name of the IPv4 address pool from which a home address is allocated to an mobile node (MN) subscriber.

Step 10

pool ipv6 pool-name pfxlen number

Example:


Device(config-ipv6-pmipv6lma-network)# pool ipv6 v6pool pfxlen 24

Specifies the name of the IPv6 address pool from which a home address is allocated to the MN subscriber.

Step 11

exit

Example:


Device(config-ipv6-pmipv6lma-network)# exit

Exits the LMA-network configuration mode and enters LMA configuration mode.

Step 12

default profile profile-name

Example:


Device(config-ipv6-pmipv6-lma)# default profile profile1

Enables the default profile for the MN.

Step 13

role 3gma

Example:


Device(config-ipv6-pmipv6-lma)# role 3gma

Enables 3GMA and enters 3GMA mode.

Note 
Specifying at least one interface is mandatory. The role 3gma command does not work if no interface is specified.
Step 14

interface interface-type

Example:


Device(config-ipv6-pmipv6lma-role)# interface Ethernet 1

Configures 3GMA interface on LMA.

Step 15

rat rat-type priority priority-number

Example:


Device (config-ipv6-pmipv6lma-role)# rat wlan priority 2

Sets the priority for Radio Access Type (RAT).

Step 16

end

Example:


Device (config-ipv6-pmipv6lma-role)# end

Exits 3GMA role configuration mode and enters privileged EXEC mode.

Step 17

show ipv6 mobile pmipv6 lma binding

Example:


Device# show ipv6 mobile pmipv6 lma binding

Displays the list of the LMA bindings established over the Proxy Mobile IPv6 (PMIPv6) signaling plane.

Configuration Examples for PMIP Mobility - 3G Mobility Anchor

Example: Configuring LMA in 3GMA Mode

The following example shows how to configure LMA in 3GMA mode: 


Device> enable
Device# configure terminal
Device(config)# ip local pool v4pool 209.165.201.1 209.165.201.10
Device(config)# ipv6 local pool v6pool 2001:0DB8::/32 64
Device(config)# ipv6 unicast-routing
Device(config)# ipv6 mobile pmipv6-lma lma1 domain dn1
Device(config-ipv6-pmipv6-lma)# address ipv6 2001:DB8::1
Device(config-ipv6-pmipv6-lma)# network network1
Device(config-ipv6-pmipv6lma-network)# pool ipv4 v4pool pfxlen 24
Device(config-ipv6-pmipv6lma-network)# pool ipv6 v6pool pfxlen 24
Device(config-ipv6-pmipv6lma-network)# exit
Device(config-ipv6-pmipv6-lma)# default profile profile1
Device(config-ipv6-pmipv6-lma)# role 3gma
Device(config-ipv6-pmipv6lma-role)# interface Ethernet 1
Device (config-ipv6-pmipv6lma-role)# rat wlan priority 2
Device (config-ipv6-pmipv6lma-role)# end
Device# show ipv6 mobile pmipv6 lma binding

Additional References for PMIP Mobility - 3G Mobility Anchor

Related Documents

Related Topic Document Title

Cisco IOS commands

Cisco IOS Master Command List, All Releases

IP mobility commands

Cisco IOS IP Mobility Command Reference

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

RFC 5846

Binding Revocation for IPv6 Mobility

Technical Assistance

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Feature Information for PMIP Mobility - 3G Mobility Anchor

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 PMIP Mobility - 3G Mobility Anchor
Feature Name Releases Feature Information

PMIP Mobility - 3G Mobility Anchor

Cisco IOS XE Release 3.9S

The 3G Mobility Anchor(3GMA) feature acts as an anchor point for 3G User Equipment (UE). 3GMA functions as the DHCP server for Gateway general packet radio service (GPRS) Support Node (GGSN)/Packet Data Serving Node (PDSN), and as a Local Mobility Anchor (LMA) towards Wi-Fi Mobile Access Gateway (MAG).

The following commands were introduced or modified: rat , role 3gma , interface (proxy mobile IPv6) , and show ipv6 mobile pmipv6 lma binding