This section explains how to configure a basic Frame Relay PVC. Frame Relay is configured on a serial interface and the default encapsulation type is the Cisco proprietary version of HDLC. To change the encapsulation to Frame Relay use the

cisco	Uses the Cisco proprietary Frame Relay encapsulation. Use this option if connecting to another Cisco router. Many non-Cisco devices also support this encapsulation type. This is the default.
ietf	Sets the encapsulation method to comply with the Internet Engineering Task Force (IETF) standard RFC 1490. Select this if connecting to a non-Cisco router.

Cisco’s proprietary Frame Relay encapsulation uses a 4-byte header, with 2 bytes to identify the data-link connection identifier (DLCI) and 2 bytes to identify the packet type.

Set an IP address on the interface using the ip address command. Set the bandwidth of the serial interface using the bandwidth command. Bandwidth is specified in kilobits per second (kbps). This command is used to notify the routing protocol that bandwidth is statically configured on the link. The bandwidth value is used by Interior Gateway Routing Protocol (IGRP), Enhanced Interior Gateway Routing Protocol (EIGRP), and Open Shortest Path First (OSPF) to determine the metric of the link. This command also affects bandwidth utilization statistics that can be found by using the show interfaces command.

The LMI connection is established and configured by the frame-relay lmi-type [ansi | cisco | q933a] command. This command is only needed if using Cisco IOS Release 11.1 or earlier. With IOS Release 11.2 or later, the LMI-type is autosensed and no configuration is needed. The default LMI type is cisco. The LMI type is set on a per-interface basis and is shown in the output of the show interfaces command.

These configuration steps are the same, regardless of the network layer protocols operating across the network.