Cisco ASR 5000 Series, Обзор продукта

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CDMA2000 Wireless Data Services
Understanding Simple IP and Mobile IP ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Table 54. AAA/PDSN Assigned IP Address Proxy Mobile IP Call Flow Description
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/FA establish the R-P interface for the session.
3 The PDSN/FA and MN negotiate Link Control Protocol (LCP).
4 Upon successful LCP negotiation, the MN sends a PPP Authentication Request message to the PDSN/FA.
5 The PDSN/FA sends an Access Request message to the RADIUS AAA server.
6 The RADIUS AAA server successfully authenticates the subscriber and returns an Access Accept message to the
PDSN/FA. The Accept message may contain various attributes to be assigned to the MN including the MN‘s Home
Address (IP address) and the IP address of the HA to use.
7 The PDSN/FA sends a PPP Authentication Response message to the MN.
8 The MN sends an Internet Protocol Control Protocol (IPCP) Configuration Request message to the PDSN/FA with an MN
address of 0.0.0.0.
9 The PDSN/FA forwards a Proxy Mobile IP Registration Request message to the HA. The message includes such things as
the MN‘s home address, the IP address of the FA (the care-of-address), and the FA-HA extension (security parameter index
(SPI)).
10 While the FA is communicating with the HA, the MN may send additional IPCP Configuration Request messages.
11 The HA responds with a Proxy Mobile IP Registration Response after validating the home address against it‘s pool(s). The
HA also creates a Mobile Binding Record (MBR) for the subscriber session.
12 The MN and the PDSN/FA negotiate IPCP. The result is that the MN is assigned the home address originally specified by
the AAA server.
13 While the MN and PDSN/FA are negotiating IPCP, the HA and AAA server initiate accounting.
14 Upon completion of the IPCP negotiation, the PDSN/FA and AAA server initiate accounting fully establishing the session
allowing the MN to send/receive data to/from the PDN.
15 Upon completion of the session, the MN sends an LCP Terminate Request message to the PDSN to end the PPP session.
16 The PDSN/FA sends a Proxy Mobile IP De-registration Request message to the HA.
17 The PDSN/FA send an LCP Terminate Acknowledge message to the MN ending the PPP session.
18 The HA sends a Proxy Mobile IP De-Registration Response message to the FA terminating the Pi interface
19 The PDSN/FA and the PCF terminate the R-P session.
20 The HA and the AAA server stop accounting for the session.
21 The PDSN and the AAA server stop accounting for the session.
Scenario 2: HA Assigns IP Address to MN from Locally Configured Dynamic Pools
The following figure and table display and describe a call flow in which the MN receives its IP address from the AAA
server and PDSN/FA.