How This Configuration Works - Cisco ASR 5000 Series Administration Manual

▀ Using the System as Both a GGSN/FA and an HA
Required Information
Maximum registration
lifetime
Maximum number of
simultaneous bindings
Default Subscriber Configuration
"Default" subscriber‟s IP
context name

How This Configuration Works

This system configuration supports typical GGSN and Mobile IP functionality.
System operation for typical GGSN functionality behaves as described in GGSN Configuration Example chapter of this
guide for each of the various call types. This section focusses on how this system configuration functions to process a
Mobile IP session. The following figure and the text that follows describe how this configuration works to process calls
▄ Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide
Description
Replay-protection process: Specifies how protection against replay-attacks is implemented. The
possible processes are nonce and timestamp. The default is timestamp with a tolerance of 60
seconds.
A replay-protection process is required for each mobile node-to-HA SPI configured.
Specifies the longest registration lifetime that the HA service will allow in any Registration Request
message from the mobile node.
The time is measured in seconds and can be configured to any integer value between 1 and 65535.
An infinite registration lifetime can also be configured by disabling the timer. The default is 600.
Specifies the maximum number of "care-of" addresses that can simultaneously be bound for the
same user as identified by NAI and Home address.
The number can be configured to any integer value between 1 and 5. The default is 3.
Specifies the name of the egress context on the system that facilitates the Gi interfaces.
NOTE: For this configuration, the IP context name should be identical to the name of the
destination context.
GGSN and Mobile IP Service in a Single System Configuration Example
OL-22944-02