Frame Relay WAN Protocol Configuration

Frame Relay WAN Protocol Configuration 1. Frame Relay is a high-performance WAN protocol, which runs on the physical layer and data link layer of the OSI reference model. It is a data packet exchange technology and a simplified version of X.25. It skips some strong functions of X.25, such as window technology and data re-transmission technology, but relies on high-level protocols to provide error correction, because Frame Relay works on better WAN devices, these devices have more reliable connection services and higher reliability than X.25 WAN devices. They strictly correspond to the Layer 2 of the OSI reference model, while X.25 also provides Layer 3 services, therefore, frame relay has higher performance and more effective transmission efficiency than X.25. The devices of the frame relay WAN are divided into the data terminal device (DTE) and the data circuit terminal device (DCE), and the Cisco router acts as the DTE device. Frame Relay technology provides connection-oriented data link layer communication. Each pair of devices has a defined communication link, and the link has a link identifier. This service is implemented through the Frame Relay virtual circuit, and each frame relay virtual circuit identifies itself with a data link identifier (DLCI. The DLCI value is generally specified by the Frame Relay Service Provider. Frame Relay supports both PVC and SVC. The frame relay Local Management Interface (LMS) is an extension of the basic frame relay standard. It is a signaling standard between the router and the frame relay switch and provides a frame relay management mechanism. It provides many features for managing complex interconnected networks, including global addressing, virtual circuit status messages, and multi-object transmission. 2. related commands: port setting Task Command set Frame Relay encapsulation frame-relay [ietf] 1 set Frame Relay lm-relay type frame-relay lm-type {ansi | cisco | q933a} 2 set sub-interface -type interface-number.subinterface-number [multipoint | point-to-point] ing protocol address and DLCIframe-relay map protocol-address dlci [broadcast] 3 set fr dlci No. frame-relay interface-dlci [broadcast] Note: 1. if a Cisco router is connected to a route Device of another manufacturer, the frame relay encapsulation specified by the Internet Engineering Task Group (IETF) is used. Format. 2. starting from Cisco IOS 11.2, the software supports the local management interface (LMS) "auto-sensing" and "auto-sensing" to enable the interface to determine the type of LMS supported by the switch, you may not explicitly configure the LMS interface type. 3. The broadcast option allows route broadcast information to be transmitted over the Frame Relay Network. 3. frame relay point to point configuration instance: Router1: interface serial 0 encapsulation frame-relay! Interface serial 0.1 point-to-pointip address 172.16.1.1 255.255.0frame-reply interface-dlci 105! Interface serial 0.2 point-to-pointip address 172.16.2.1 255.255.0frame-reply interface-dlci 102! Interface serial 0.3 point-to-pointip address 172.16.4.1 255.255.255.0frame-reply interface-dlci 104! Router2: interface serial 0 encapsulation frame-relay! Interface serial 0.1 point-to-pointip address 172.16.2.2 255.255.255.0frame-reply interface-dlci 201! Interface serial 0.2 point-to-pointip address 172.16.3.1 255.255.255.0frame-reply interface-dlci 203! Related Debugging commands: show frame-relay lmishow frame-relay mapshow frame-relay pvcshow frame-relay routeshow interfaces serialgo top4. frame relay Multipoint configuration instance: Router1: interface serial 0 encapsulation frame-reply! Interface serial 0.1 multipointip address 172.16.1.2 255.255.255.0frame-reply map ip 172.16.1.1 201 broadcastframe-reply map ip 172.16.1.3 301 broadcastframe-reply map ip 172.16.1.4 401 broadcast! Router2: interface serial 0 encapsulation frame-reply! Interface serial 0.1 multipointip address 172.16.1.1 255.255.255.0frame-reply map ip 172.16.1.2 102 broadcastframe-reply map ip 172.16.1.3 102 broadcastframe-reply map ip 172.16.1.4 102 broadcast!