Command Reference

encapsulation frame-relay

To enable Frame Relay encapsulation, use the encapsulation frame-relay interface configuration command. To disable Frame Relay encapsulation, use the no form of this command.
encapsulation frame-relay [cisco | ietf]

no encapsulation frame-relay [ietf]

Syntax Description

cisco

(Optional) Uses Cisco's own encapsulation, which is a 4-byte header, with 2 bytes to identify the data-link connection identifier (DLCI) and 2 bytes to identify the packet type.

ietf

(Optional) Sets the encapsulation method to comply with the Internet Engineering Task Force (IETF) standard (RFC 1490). Use this keyword when connecting to another vendor's equipment across a Frame Relay network.

Defaults

Enabled

Command Modes

Interface configuration

Command History

Release Modification

10.0

This command was introduced.

Usage Guidelines

Use this command with no keywords to restore the default Cisco encapsulation, which is a 4-byte header with 2 bytes for the DLCI and 2 bytes to identify the packet type.

You should shut down the interface prior to changing encapsulation types. Although this is not required, shutting down the interface ensures the interface is reset for the new encapsulation.

Examples

The following example configures Cisco Frame Relay encapsulation on interface serial 1:
interface serial 1
encapsulation frame-relay
Use the ietf keyword if your router or access server is connected to another vendor's equipment across a Frame Relay network to conform with RFC 1490:
interface serial 1
encapsulation frame-relay ietf

cisco	(Optional) Uses Cisco's own encapsulation, which is a 4-byte header, with 2 bytes to identify the data-link connection identifier (DLCI) and 2 bytes to identify the packet type.
ietf	(Optional) Sets the encapsulation method to comply with the Internet Engineering Task Force (IETF) standard (RFC 1490). Use this keyword when connecting to another vendor's equipment across a Frame Relay network.