Cisco Cisco IOS Software Release 12.3(11)T

Public IP addresses

Private IP addresses

Multiple flows for different Network Access Identifiers (NAIs) using static or dynamic addresses

Multiple flows for the same NAI using different static addresses

Foreign Agent Challenge extensions in RFC 3012 - bis 03

Mobile IP Agent Advertisement Challenge Extension

MN-FA Challenge Extension

Generalized Mobile IP Authentication Extension, which specifies the format for the MN-AAA 
Authentication Extension

Mobile IP Extensions specified in RFC 2002

MN-HA Authentication Extension

FA-HA Authentication Extension

Reverse Tunneling, RFC 2344

Mobile NAI Extension, RFC 2794

Multiple tunneling modes between FA and HA

IP-in-IP Encapsulation, RFC 2003

Generic Route Encapsulation, RFC 2784

Binding Update message for managing stale bindings

Home Agent redundancy support

Mobile IP Extensions specified in RFC 3220

Authentication requiring the use of SPI. section 3.2

Support for Packet Filtering

Input access lists 

Output access lists

Support for proxy and gratuitous ARP

Mobile IP registration replay protection using time stamps. Nonce-based replay protection is not 
supported

Supports static and dynamic IP address allocation.

Attracts, intercepts, and tunnels datagrams for delivery to the MS.

Receives tunneled datagrams from the MS (through the FA), unencapsulates them, and delivers them 
to the corresponding node (CN). 

Depending on the configuration, reverse tunneling may, or may not, be used by the MS, and 
may or may not be accepted by the HA.

Presents a unique routable address to the network.