Frame Relay Standards

All written standards that govern Frame Relay implementations are American National Standards Institute (ANSI), International Telecommunication Union Telecommunication Standardization Sector (ITU-T), or Frame Relay Forum (FRF) standards. Although ANSI and ITU-T standards are based on the ISDN architecture, the FRF documents address implementation issues, ensuring the interoperability of multivendor networks. Table 14-2 summarizes some of the ANSI and ITU-T standards governing Frame Relay.

Table 14-2. ANSI and ITU-T Standards Governing Frame Relay

Subject	ANSI	ITU-T
Architecture and service description	T1.606	I.233
Data link layer core aspects	T1.618	Q.922 Annex A
PVC management	T1.617 Annex D	Q.933 Annex A
Congestion management	T1.606a	I.370
Switched virtual connection (SVC) signaling	T1.617	Q.933

The FRF (www.frforum.com) was created to develop Frame Relay technologies, to improve the existing standards, and to facilitate multivendor inter-operability. The FRF's formal documents are called Implementation Agreements (IAs). Table 14-3 shows the current issued agreements.

Table 14-3. Frame Relay Forum (FRF) Implementation Agreements

Document	Description
FRF.1.2	User-Network Interface (UNI)
FRF.2.1	Network-to-Network Interface (NNI)
FRF.3.2	Multiprotocol Encapsulation
FRF.4.1	SVC User-Network Interface (UNI)
FRF.5	Frame Relay/ Asynchronous Transfer Mode (ATM) PVC Network Interworking
FRF.6	Frame Relay Service Customer Network Management
FRF.7	Frame Relay PVC Multicast Service and Protocol Description
FRF.8.1	Frame Relay/ATM PVC Service Interworking
FRF.9	Data Compression over Frame Relay
FRF.10.1	Frame Relay Network-to-Network SVC
FRF.11.1	VoFR
FRF.12	Frame Relay Fragmentation
FRF.13	Service Level Definitions
FRF.14	Physical layer Interface
FRF.15	End-to-End Multilink Frame Relay
FRF.16	Multilink Frame Relay UNI/NNI
FRF.17	Frame Relay Privacy
FRF.18	Network-to-Network FR/ATM SVC
FRF.19	Frame Relay Operations, Administration, and Maintenance
FRF.20	Frame Relay IP Header Compression

The RFCs specific to Frame Relay are listed in Table 14-4.

Table 14-4. IETF Frame Relay Related RFCs

Document	Description
1604	Definition of Managed Objects from Frame Relay Services
1596	Definition of Managed Objects from Frame Relay Services
1315	Management Information Base for Frame Relay DTEs
1490	Multiprotocol Interconnect over Frame Relay
1294	Multiprotocol Interconnect over Frame Relay
1293	Inverse Address Resolution Protocol (ARP)
1973	Point-to-Point Protocol (PPP) in Frame Relay
2427	Multiprotocol Interconnect over Frame Relay