Cisco Cisco IOS Software Release 12.2(4)XF Release Notes

The following sections list the new hardware and software features supported by the 
Cisco uBR7100 series routers for Cisco IOS Release 12.2 XF.

There are no new hardware features supported by the Cisco uBR7100 series routers in Cisco IOS 
Release 12.2(4)XF1.

The following new software features are supported by the Cisco uBR7100 series routers in Cisco IOS 
Release 12.2(4)XF1.

Cisco IOS Release 12.2(4)XF1 provides support for the original DOCSIS 1.0 standard that provides for 
basic best-effort data traffic and Internet access over the coaxial cable network. The DOCSIS 1.0+ 
extensions provided Quality of Service (QoS) enhancements for real-time traffic, such as voice calls, in 
anticipation of full DOCSIS 1.1 support. 

Cisco IOS Release 12.2(4)XF1 interoperates seamlessly with both DOCSIS 1.0 and 1.0+ cable modems 
and set-top boxes. 

13. The DOCSIS 1.0+ QoS Enhancements is a set of Cisco's Quality of Service extensions to DOCSIS 1.0 to enable basic VoIP 

service over the DOCSIS link before DOCSIS 1.1 becomes available. The main enhancements include support for dynamic 
creation and teardown of flows during voice calls, support for one new unsolicited grant service (UGS) slot scheduling 
mechanism for voice slots, and per IP-precedence rate shaping on the downstream.

14. RTP = Real-Time Transport Protocol

15. RADIUS = Remote Access Dial-In User Service

16. HTTP = Hypertext Transfer Protocol

17. AAA =authentication, authorization, and accounting

18. PAD = packet assembler/disassembler

19. ISDN = Integrated Services Digital Network

20. NFAS = non-facility-associated signaling

21. BRI = Basic Rate Interface

22. PRI = Primary Rate Interface

23. VPDN = virtual private dial-up network

24. PVC = permanent virtual circuit

25. SVC = switched virtual circuit