Foundry Networks Switch and Router Installation And Configuration Manual page 172

Foundry Switch and Router Installation and Configuration Guide
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# pos scramble-atm
BigIron(config-posif-2/1)# write memory
Syntax: pos scramble-atm
Configuring POS for Frame Relay
You can configure a Foundry POS interface for Frame Relay. To configure the interface:
• Set the encapsulation type to Frame Relay and specify the Frame Relay type. You can specify IETF (RFC
1490) or use the default, Cisco-compatible.
• Specify the Frame Relay interface type.
NOTE: The current software release supports Data Terminal Equipment (DTE) only. The other end of the
link must be configured as a DCE link.
• Specify the Data-Link Connection Identifier (DLCI). This is the circuit ID for the link and can be a number in
the range from 1 – 1023. The circuit ID must be the same on both ends of the link.
• Set the Local Management Interface (LMI) type. You can specify ANSI, CCITT, or LMI (Cisco-compatible).
The default is LMI.
In addition, the setting for POS keepalive messages must be the same on both ends of the link. The keepalive
messages are enabled by default for Foundry POS interfaces. See "Disabling or Reenabling Keepalive
Messages" on page 6-8.
NOTE: The current software release supports Data Terminal Equipment (DTE) only. The other end of the link
must be configured as a DCE link. Also, the current release supports only point-to-point links, not point-to-
multipoint. Both ends of the link must be configured for point-to-point.
Changing the Encapsulation Type
To configure POS interface 2/1 to use Frame Relay, enter the following commands:
BigIron(config)# interface pos 2/1
BigIron(config-posif-2/1)# encapsulation frame-relay
Syntax: [no] encapsulation hdlc | ppp | frame-relay [ietf]
If you enter the command without the ietf parameter, the software uses the default Frame Relay type, Cisco-
compatible.
Specifying the Frame Relay Interface Type
NOTE: DTE is the default. The current release supports DTE only, so you do not need to enter this command.
The other end of the link must be DCE.
Syntax: [no] frame-relay intf-type dte
Specifying the DLCI
The DLCI identifies the circuit number for the POS link. You must use the same DLCI on both ends of the link. To
specify the DLCI, enter a command such as the following:
BigIron(config-posif-2/1)# frame-relay interface-dlci 69
Syntax: [no] frame-relay interface-dlci <num>
The <num> parameter specifies the DLCI and can be a number from 1 – 1023.
6 - 10 December 2000