Cisco Cisco IOS Software Release 12.4(2)XB6

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Field-programmable devices (FPDs) are hardware devices implemented on router cards that support 
separate software upgrades. An FPD image package is used to upgrade FPD images. 

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.