Cisco Cisco Packet Data Gateway (PDG)
LMA Service Configuration Mode Commands
alt-coa-allowed ▀
Command Line Interface Reference, StarOS Release 18 ▄
6963
alt-coa-allowed
Allows Alternate Care-of-address support to be added at LMA to separate signaling and control plane traffic.
Product
P-GW
Privilege
Administrator
Mode
Exec > Global Configuration > Context Configuration > LMA Service Configuration
configure > context context_name > lma-service service_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-lma-service)#
Syntax
[ default | no ] alt-coa-allowed
default
Including this keyword with the command disables the feature. The feature is disabled by default.
no
Disables the specified functionality.
Usage
This command allows Alternate Care-of-address support to be added at LMA to separate signaling and
control plane traffic.
control plane traffic.
Important:
The support of the extensions and functionality is defined in RFC 6275 and RFC 6463 for IPv6 and
IPv4 transport respectively.
Proxy Mobile IPv6 is a network-based mobility management protocol. The mobility entities involved in the
Proxy Mobile IPv6 protocol, the Mobile Access Gateway (MAG) and the Local Mobility Anchor (LMA),
setup tunnels dynamically to manage mobility for a mobile node within the Proxy Mobile IPv6 domain.
There is an extension to the Proxy Mobile IPv6 protocol to register an IPv4 or IPv6 data plane address that is
different from the Proxy Care-of Address with the LMA. This allows separation of control and data plane.
Some of the deployments of Proxy Mobile IPv6 separated the control and data plane end points for Mobile
Access Gateway. There will be a separate IP address for the entity that sends and received the Proxy Mobile
IPv6 signaling messages. Similarly, there will be a separate IP address for the entity that encapsulates and
decapsulates the data traffic to and from the mobile node.
In order to allow the separation of the control and data plane, the address of the data plane traffic endpoint
needs to be sent in a separate extension to register two IP addresses with the LMA. The IP address used for
the signaling messages will continue to be called the Proxy Care-of-Address. A separate IP address for the
data plane is carried in the Proxy Binding Update to indicate the tunnel end point for the data traffic.
Proxy Mobile IPv6 protocol, the Mobile Access Gateway (MAG) and the Local Mobility Anchor (LMA),
setup tunnels dynamically to manage mobility for a mobile node within the Proxy Mobile IPv6 domain.
There is an extension to the Proxy Mobile IPv6 protocol to register an IPv4 or IPv6 data plane address that is
different from the Proxy Care-of Address with the LMA. This allows separation of control and data plane.
Some of the deployments of Proxy Mobile IPv6 separated the control and data plane end points for Mobile
Access Gateway. There will be a separate IP address for the entity that sends and received the Proxy Mobile
IPv6 signaling messages. Similarly, there will be a separate IP address for the entity that encapsulates and
decapsulates the data traffic to and from the mobile node.
In order to allow the separation of the control and data plane, the address of the data plane traffic endpoint
needs to be sent in a separate extension to register two IP addresses with the LMA. The IP address used for
the signaling messages will continue to be called the Proxy Care-of-Address. A separate IP address for the
data plane is carried in the Proxy Binding Update to indicate the tunnel end point for the data traffic.