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.
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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.
You must configure the IPv4 and IPv6 address pools for the Local Mobility Anchor (LMA) to assign IPv4 or IPv6 addresses.
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 (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 (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.
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
Command or Action | Purpose | |||
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Step 1 |
enable Example:
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Enables privileged EXEC mode.
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Step 2 |
configure terminal Example:
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Enters global configuration mode. |
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Step 3 |
ip local pool pool-name low-ip-address high-ip-address Example:
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Creates a local pool of IPv4 addresses. |
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Step 4 |
ipv6 local pool pool-name prefix/prefix-length assigned-length Example:
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Creates a local pool of IPv6 addresses. |
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Step 5 |
ipv6 unicast-routing Example:
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Enables IPv6 routing. |
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Step 6 |
ipv6 mobile pmipv6-lma lma-id domain domain-name Example:
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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. |
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Step 7 |
address ipv6 ipv6-address Example:
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Configures an IPv6 address for the LMA. |
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Step 8 |
network network1 Example:
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Associates a network, on which an IPv4 or IPv6 pool is configured, with the LMA, and enters LMA-network configuration mode. |
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Step 9 |
pool ipv4 pool-name pfxlen number Example:
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Specifies the name of the IPv4 address pool from which a home address is allocated to an mobile node (MN) subscriber. |
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Step 10 |
pool ipv6 pool-name pfxlen number Example:
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Specifies the name of the IPv6 address pool from which a home address is allocated to the MN subscriber. |
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Step 11 |
exit Example:
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Exits the LMA-network configuration mode and enters LMA configuration mode. |
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Step 12 |
default profile profile-name Example:
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Enables the default profile for the MN. |
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Step 13 |
role 3gma Example:
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Enables 3GMA and enters 3GMA mode.
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Step 14 |
interface interface-type Example:
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Configures 3GMA interface on LMA. |
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Step 15 |
rat rat-type priority priority-number Example:
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Sets the priority for Radio Access Type (RAT). |
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Step 16 |
end Example:
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Exits 3GMA role configuration mode and enters privileged EXEC mode. |
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Step 17 |
show ipv6 mobile pmipv6 lma binding Example:
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Displays the list of the LMA bindings established over the Proxy Mobile IPv6 (PMIPv6) signaling plane. |
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
Related Topic | Document Title |
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Cisco IOS commands |
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IP mobility commands |
Standard/RFC | Title |
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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 |
Description | Link |
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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.Feature Name | Releases | Feature Information |
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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 |