x25 map ip 14.1.1.2 14112

Set up network with PVC

Router1：

interface serial 1 encapsulation x25

ip address 14.1.1.1 255.255.255.0 x25 address 14111

x25 ltc 3

x25 pvc 1 ip 14.1.1.2

x25 pvc 2 ip 14.1.1.3 Router2：

interface serial 1 encapsulation x25

ip address 14.1.1.2 255.255.255.0 x25 address 14112

x25 ltc 3

x25 pvc 1 ip 14.1.1.1

x25 pvc 2 ip 14.1.1.3 Router3：

interface serial 1 encapsulation x25

ip address 14.1.1.3 255.255.255.0 x25 address 14113

x25 ltc 3

x25 pvc 1 ip 14.1.1.1

x25 pvc 2 ip 14.1.1.2

4.8 Frame Relay Protocol

Frame relay protocol is provides multiplexing logical data conversations over a single physical transmission link by assigning connection identify to each DTE devices.

Frame relay also supports PVC and SVC for data transfer between DTE devices. The different between X.25 and frame relay is frame relay doesn’t have the windowing and retransmission strategies. Also frame relay is only layer 2 protocol.

DLCI (data-link connection identifier) identifies the logical virtual circuit between DTE and frame relay switch.

Frame Relay signaling

LMI (local management interface) is responsible for managing the connection and maintaining status between the CPE devices and the FR switch.

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