PMIP — Dynamic CoA Support

The PMIP — Dynamic CoA feature enables the Local Mobility Anchor (LMA) to identify a Mobile Access Gateway (MAG) based on a dynamic IP address. The MAG gets its IP address from one of the roaming interfaces based on the priority and status of the 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.

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.

Information About Proxy Mobile IPv6 Support for MAG Functionality

Proxy Mobile IPv6 Overview

Proxy Mobile IPv6 (PMIPv6) provides network-based IP Mobility management to a mobile node (MN), without requiring the participation of the MN in any IP mobility-related signaling. The mobility entities in the network track the movements of the MN, initiate the mobility signaling, and set up the required routing state.

The major functional entities of PMIPv6 are Mobile Access Gateways (MAGs), Local Mobility Anchors (LMAs), and MNs.

Mobile Access Gateways

Mobile Access Gateway (MAG) performs mobility-related signaling on behalf of the mobile nodes (MN) attached to its access links. MAG is the access router for the MN; that is, MAG is the first-hop router in the localized mobility management infrastructure.

MAG performs the following functions:

  • Obtains an IP address from Local Mobility Anchor (LMA) and assigns it to MN.

  • Retains the IP address of an MN when the MN roams across MAGs.

  • Tunnels traffic from MN to LMA.

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.

Mobile Map

Mobile map configuration facilitates application-based routing. More than one mobile map can be configured under the Proxy Mobile IPv6 (PMIPv6) domain, however, at a given point of time, only one mobile map is active at Mobile Access Gateway (MAG) and Local Mobility Anchor (LMA). The mobile map and its entries are configured or modified when no bindings are available.

Multipath Support

At any given time, many network paths exists between Local Mobility Anchor (LMA) and Mobile Access Gateway (MAG). The PMIP: Multipath Support on MAG and LMA feature enables MAG to select any one of the paths on priority basis or select all the existing network paths simultaneously to create tunnels to reach LMA. All paths have the same priority when multiple paths are selected.

Logical Mobile Node

Logical Mobile Node (LMN) is a logical entity that represents a mobile node (MN) that is hosted on one of the interfaces of Mobile Access Gateway (MAG) device. LMN has Network Access Indicator (NAI) similar to MN. One or more networks can be associated with each LMN through the interfaces designated as mobile network interfaces. LMN on mobile network receives an IP address from a DHCP server that runs on MAG, unlike a mobile node whose address is assigned by Local Mobility Anchor (LMA).

How to Configure PMIP - Dynamic CoA Support

Configuring PMIP - Dynamic CoA Support

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    ipv6 mobile pmipv6-mag mag-id domain domain-name

    4.    address dynamic

    5.    roaming interface name type priority priority egress-att access-tech-type label egress-label

    6.    end


DETAILED STEPS
     Command or ActionPurpose
    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 ipv6 mobile pmipv6-mag mag-id domain domain-name


    Example: 
    Device(config)# ipv6 mobile pmipv6-mag mag1 domain dn1
     

    Enables the MAG service on the device, configures the PMIP domain for the LMA, and enters MAG configuration mode.

     
    Step 4 address dynamic


    Example: 
    Device(config-ipv6-pmipv6-mag)# address dynamic
     

    Configures dynamic address for a MAG.

     
    Step 5 roaming interface name type priority priority egress-att access-tech-type label egress-label


    Example: 
    Device(config-ipv6-pmipv6-mag-addr-dyn)# roaming interface Ethernet 0/0 priority 2 egress-att ATT label egress1
     

    Specifies an interface as a roaming interface for MAG.

     
    Step 6 end


    Example: 
    Device(config-ipv6-pmipv6-mag-addr-dyn)# end
     

    Exits MAG configuration mode and enters privileged EXEC mode.

     

    Configuration Examples for PMIP - Dynamic CoA Support

    Example: Configuring PMIP - Dynamic CoA Support

    Device> enable
Device# configuration terminal
Device(config) ipv6 mobile pmipv6-mag mag1 domain dn1
Device(config-ipv6-pmipv6-mag)# address dynamic
Device(config-ipv6-pmipv6-mag-addr-dyn)# roaming interface Ethernet 0/0 priority 2 egress-att ATT label egress1 
Device(config-ipv6-pmipv6-mag-addr-dyn)# end

    Additional References

    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

    MIBs

    MIB

    MIBs Link

    None

    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 PMIP - Dynamic CoA Support

    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 - Dynamic CoA Support

    Feature Name

    Releases

    Feature Information

    PMIP - Dynamic CoA Support

    15.4(1)T

    The PMIP - Dynamic CoA feature enables the Local Mobility Anchor (LMA) to identify a Mobile Access Gateway (MAG) based on a dynamic IP address. The MAG gets its IP address from one of the roaming interfaces based on the priority and status of the interface.