Command:

encapsulation frame-relay


Mode:

Router(config-if)#


Syntax:

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.


Command Description:

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.

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.


Example:

The following example configures Cisco Frame Relay encapsulation on interface serial 1:

Router(config)#interface serial 1
Router(config-if)#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:

Router(config)#interface serial 1
Router(config-if)#encapsulation frame-relay ietf

Misconceptions:
None

Related Commands:
None

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