Cisco Cisco IOS Software Release 12.4(22)XR

Migration to the Cisco PDSN Release 5.5 image is more than replacing Multi-processor WAN 
Application Module (MWAM) cards with SAMI modules. Ensure that you plan your migration such that 
migration activities have a minimal impact on an existing mobile subscriber’s service connections. 

 lists the migration tasks that are based on the scenarios established in 

1

In SAMI cards with the Cisco PDSN Release 4.0 image, erase configuration on all 
processors and reload Cisco PDSN.

Configure the I/O memory (IOMEM) on all processors as 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 to Cisco PDSN Release 5.5 and reconfigure the Cisco PDSN configuration on 
processor 3.

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

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

To minimize provisioning tasks, Cisco PDSN Release 5.5 reuses the IP address and routing 
scheme used in one of the Cisco PDSN Release 4.0 processors.

1. MS = Mobile Station.

2. PCF = Packet Control Function.