Cisco Cisco IOS Software Release 12.0(14)S

This feature module describes the FRF2.1 Annex 1 feature. It includes information on the benefits of the 
new feature, supported platforms, related documents and so on.

This document includes the following sections:

The FRF2.1 Annex 1 for Event Driven Procedures feature provides a signalling protocol for permanent 
virtual circuit (PVC) monitoring at the Network-to-Network Interface (NNI) for a Frame Relay 
switching network. FRF2.1 Annex 1 generates notification when an event occurs that changes status, and 
when an event occurs, it generates immediate notification. 

FRF2.1 Annex 1 allows for faster notification of PVC status, such as addition, deletion, or availability, 
in Frame Relay switching networks with multiple switching nodes. The faster notification results in 
better network management as well as increased PVC scalability per interface because Local 
Management Interface (LMI) procedures are not needed at each NNI node for each PVC in the network. 

FRF2.1 Annex 1 adds event driven procedures to the enterprise Frame Relay network. It enables fast 
convergence and provides quick responses to any changes within a Frame Relay network.

FRF2.1 Annex 1 benefits are as follows: