Cisco Cisco IOS Software Release 12.4(22)XR

The following sections describe how to determine the existing software version and how to upgrade your 
Cisco PDSN:

For information on upgrading to a new software release, see the product bulletin Cisco IOS Software 
Upgrade Ordering Instructions, located at:

6

In the existing Cisco PDSN Release 4.0, erase the existing configuration on all 
processors and reload the Cisco PDSN.

Configure the IOMEM size on all processors to 256 MB and save the configuration to 
the NVRAM. 

If you have set the IOMEM size as 64 MB, ensure that you configure the memory 
lite command. The recommended memory size is, however, 256 MB.

Upgrade both the SAMI blades to Cisco PDSN Release 5.5. 

Reconfigure the Cisco PDSN and enable inter-chassis HSRP redundancy as in Cisco 
PDSN Release 4.0. 

Provision MS and PCFs to use the newly added Cisco PDSN Release 5.5-based PDSN 
IP.

Use the CDMA-1x IP address on the PDSN as controller or member IP when 
provisioning.

Provision the newly added Cisco PDSN with the HA to service MIP calls.