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Introduction

With this release of software, v4.4.10, support for IP unnumbered Frame Relay is included. This document gives the additional keywords that are needed to configure the WAN port of a router to work on an IP unnumbered Frame Relay connection.

Unnumbered Frame Relay

With this release of software, v4.4.10, support for IP unnumbered Frame Relay is included. This document gives the additional keywords that are needed to configure the WAN port of a router to work on an IP unnumbered Frame Relay connection. A sample configuration is also included below.

The keywords to configure IP unnumbered Frame Relay are included in the [ IP Wan ] configuration section. Please refer to our Text Based Configuration and Command Line Management Reference Guide for the remainder of the keywords that are allowed in this section. The keywords to support unnumbered Frame Relay for the [ IP Wan ] where is the WAN port of the router are:

Numbered = True|False, On|Off, 1|0, or Yes|No

This keyword configures the IP addressing to be unnumbered when set to TRUE. This keyword currently exists for WAN ports and was commonly used, prior to supporting unnumbered Frame Relay, to support unnumbered PPP links.

PointToPointFrame = True|False

This keyword configures the router to do a point-to-point Frame Relay connection when set to TRUE. This parameter allows the router to recognize that the link isn't multi-point and that a static Frame Relay DLCI will be specified for the PVC. This allows the router to forward IP frames without associating a numbered forwarding address that is normally required on a numbered Frame Relay link. Also, when this is set to TRUE, the router will not perform any dynamic Inverse ARP on the PVC when it becomes active.

This is similar to the Cisco configuration where specification of a serial interface to be point-to-point is done on unnumbered Frame Relay. However, Cisco limits point-to-point interfaces to sub-interface serial ports. Compatible Systems does not, and this is permitted on a primary interface.

InterfaceDLCI =

This keyword specifies the DLCI that is the local end-point for the unnumbered Frame Relay link. This allows resolution between the IP layer and the physical layer on the point-to-point link since no dynamic address resolution will occur on the unnumbered link.

This is similar to the Cisco configuration command: "frame-relay interface-dlci " that specifies the DLCI for the unnumbered link.

Below are two sample configurations for the WAN ports to accomplish an unnumbered frame connection on a Compatible Systems router. The first shows an unnumbered IP connection on the primary and the second shows how a unnumbered IP connection is done on a sub-interface.

IP unnumbered Configuration for primary interface:

[ IP Wan 0 ]
InterfaceDLCI = 500
PointToPointFrame = On
Numbered = Off
Mode = Routed

[ Link Config Wan 0 ]
ConnectMode = Dedicated
Mode = FrameRelay

IP Un-numbered Configuration for sub-interfaces:

[ IP Wan 0 ]
Mode = Routed

[ IP Wan 0.1 ]
InterfaceDLCI = 600
PointToPointFrame = On
Numbered = Off
Mode = Routed

[ Link Config Wan 0 ]
ConnectMode = Dedicated
Mode = FrameRelay

Note: The primary still has to be included to allow specification of the "Mode" parameter that specifies that the WAN port is a routed port.

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