Cisco Systems OL-6918-01 VRF Support on HA, Choose HA Service Manager Service Activation HA VRF

Chapter 4 Using Service Manager

Activating Services on HA Devices

•Click Cancel to exit the wizard.

•Click Back to edit the configuration.

VRF Support on HA

Mobile nodes can share a common IP address across different realms on the same Home Agent. This feature is based on the Multi-VPN Routing and Forwarding (VRF) Customer Edge (CE) network architecture to support multiple VPNs (and, therefore, multiple customers) per Customer Edge (CE) device. This reduces the amount of equipment required and simplifies administration, while allowing the use of overlapping IP addresses within the CE network. Separate VRF table are maintained for each realm. Multiple IP addresses are used at the Home Agent to indicate different enterprise connections or VRFs to the PDSN. Thus, one mobile IP tunnel runs between the PDSN and the HA per realm or VRF.

A typical scenario with VRF enabled on Home Agent:

When a Mobile IP registration requests (RRQ) arrives at the Home Agent, it will read the NAI field of the incoming RRQ and select a pre-configured IP address. This forms a mobile IP tunnel back to the PDSN with this IP address as the source address of the tunnel. The Home Agentt adds a host route that corresponds to the IP address that is assigned for the mobile in the routing table of the VRF that is defined for the realm. The tunnel end-point at Home Agent is also inserted in the VRF routing table. This feature enables the mobile nodes to share common IP address across different realms on the same Home Agent.

To display a list of all realms that are configured with VRF in the HA Service Manager:

Step 1 Choose a device group. (Choose Service Manager > Select Group.) See Selecting an HA Device Group, page 4-3.

Step 2 Choose HA Service Manager > Service Activation > HA VRF.

The Home Agent VRF dialog box displays a list of VRF configured realms, in the selected device group. It contains:

Field	Description
Realm Name	Specifies the realm name. It is a unique identifier with the syntax @realm.
VRF Name	Specifies a unique name to identify the VRF for a specific group.
Virtual HA IP	Specifies the IP address of the Home Agent.
Address

Click any column heading to sort the list.

Step 3 From the Home Agent VRF dialog box, you can:

•Click Execute without selecting a realm to configure its VRF.

•Choose a realm and:

–Click Execute to modify its VRF configuration.

–Click List to view its current configuration.

–Click Delete to delete it. You can also delete one or more VRF configurations at the same time.

User Guide for Cisco Home Agent Service Manager

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