Cisco Cisco IOS Software Release 12.4(2)XB6

Cisco PDSN MIB enhancement

Cisco proprietary prepaid billing

3DES encryption

Mobile IP IPsec

Hardware IPsec acceleration using IPsec acceleration module—Static IPsec

1xEV-DO support

Integrated Foreign Agent (FA)

AAA support

Packet transport for VPDN

Proxy mobile IP

Multiple mobile IP flows

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most 
serious caveats; severity 2 caveats are less serious. 

Caveats for Cisco IOS Releases 12.4 are available on Cisco.com at 

The “

” section lists open caveats that apply to the current release; they might also apply to 

previous releases.

The “

” section lists caveats resolved in a particular release that may have been open in 

previous releases.

If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for 
any release. You can access Bug Navigator II on Cisco.com at Software Center: Cisco IOS Software: 
Cisco Bug Toolkit: Cisco Bugtool Navigator II, or at 

There are no unresolved caveats in the following releases:

Cisco IOS Release 12.4(15)XR6

Cisco IOS Release 12.4(15)XR5

Cisco IOS Release 12.4(15)XR4

Cisco IOS Release 12.4(15)XR3