Product Specifications
Hardware Requirements
Platforms
Components
Note:
IMPORTANT:
Operating System Requirements
MPLS Forwarding with LDP
Supported Standards
Requests for Comments (RFCs)
Network Deployment Configurations
Standalone PDSN/FA and HA Deployments
Interface Descriptions
AAA Interfaces
IMPORTANT:
Co-Located Deployments
Mobile IP Tunneling Methods
IP in IP tunnels
GRE tunnels
IMPORTANT:
Forward Tunneling
Reverse Tunneling
Triangular Routing
How Mobile IP Works
Step | Description |
---|---|
1 | Mobile Node (MN) secures a traffic channel over the airlink with the RAN through the BSC/PCF. |
2 | The PCF and PDSN establish the R-P interface for the session. |
3 | The PDSN and MN negotiate Link Control Protocol (LCP). |
4 | The PDSN and MN negotiate the Internet Protocol Control Protocol (IPCP). |
5 | The PDSN/FA sends an Agent Advertisement to the MN. |
6 | The MN sends a Mobile IP Registration Request to the PDSN/FA. |
7 | The PDSN/FA sends an Access Request message to the visitor AAA server. |
8 | The visitor AAA server proxies the request to the appropriate home AAA server. |
9 | The home AAA server sends an Access Accept message to the visitor AAA server. |
10 | The visitor AAA server forwards the response to the PDSN/FA. |
11 | Upon receipt of the response, the PDSN/FA forwards a Mobile IP Registration Request to the appropriate HA. |
12 | The HA sends an Access Request message to the home AAA server to authenticate the MN/subscriber. |
13 | The home AAA server returns an Access Accept message to the HA. |
14 | Upon receiving response from home AAA, the HA sends a reply to the PDSN/FA establishing a forward tunnel. Note that the reply includes a Home Address (an IP address) for the MN. |
15 | The PDSN/FA sends an Accounting Start message to the visitor AAA server. The visitor AAA server proxies messages to the home AAA server as needed. |
16 | The PDSN return a Mobile IP Registration Reply to the MN establishing the session allowing the MN to send/receive data to/from the PDN. |
17 | Upon session completion, the MN sends a Registration Request message to the PDSN/FA with a requested lifetime of 0. |
18 | The PDSN/FA forwards the request to the HA. |
19 | The HA sends a Registration Reply to the PDSN/FA accepting the request. |
20 | The PDSN/FA forwards the response to the MN. |
21 | The MN and PDSN/FA negotiate the termination of LCP effectively ending the PPP session. |
22 | The PCF and PDSN/FA close terminate the R-P session. |
23 | The HA sends an Accounting Stop message to the home AAA server. |
24 | The PDSN/FA sends an Accounting Stop message to the visitor AAA server. |
25 | The visitor AAA server proxies the accounting data to the home AAA server. |
Understanding Mobile IP
Session Continuity Support for 3GPP2 and WiMAX Handoffs