Cisco Cisco IOS Software Release 12.2(4)YF

For additional information about feature support for this Cisco IOS release, use the Feature Navigator. 
See the 

 for additional information.

The following sections contain important notes about Cisco IOS-related issues that can apply to the 
Cisco ICS 7750. 

In a network environment that uses Cisco 2600 series routers, Cisco 3600 series routers, and 
Cisco ICS 7750s, to avoid intermittent call setup failures all platforms should run Cisco IOS 
Release 12.2(4)YF or later.

All of the MRP and ASI cards in a Cisco ICS 7750 must run the same Cisco IOS image.

Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are 
the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious 
of these three severity levels.

Caveats in Release 12.2 T are also in Release 12.2(4)YF. For information on caveats in Cisco IOS 
Release 12.2 T, refer to the 

document. For information on caveats 

in Cisco IOS Release 12.2, refer to the 

document. These documents 

list severity 1 and 2 caveats, and are located on CCO and the Documentation CD. 

If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any 
severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical 
Assistance Center: Tool Index: Bug Toolkit. Another option is to go to 

http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl

.

The following sections describe the documentation available for the Cisco ICS 7750. Typically, these 
documents consist of hardware and software installation guides, Cisco IOS configuration and command 
references, system error messages, feature modules, and other documents.

Documentation is available as printed manuals or electronic documents, except for feature modules, 
which are available online on Cisco.com and the Documentation CD-ROM.