PPP over Frame Relay Frame FormatĪ PPP connection is established over the Frame Relay PVC. The frame format is shown in the figure below.įigure 3.
PPP over Frame Relay is compliant with the functionality and encapsulation specifications as outlined in RFC 1973. The figure below shows a connectivity scenario using the Cisco 90i D4 channel card, which is capable of supporting Integrated Services Digital Network (ISDN) Digital Service Loop (DSL), PPP, or Frame Relay, which connects to an Internet Service Provider (ISP) or corporate network.įigure 2. This feature is useful for remote users running PPP to access their Frame Relay corporate networks as shown in the figure below.
IP datagrams are transported over the PPP link using RFC 1973 compliant Frame Relay framing. The PPP over Frame Relay feature allows a router to establish end-to-end Point-to-Point Protocol (PPP) sessions over Frame Relay. Only the Internet Protocol (IP) is supported. Only Frame Relay permanent virtual circuits (PVCs) are supported. To access Cisco Feature Navigator, go toīefore you can configure PPP over Frame Relay, Frame Relay must be enabled on the router using the encapsulation frame-relay command.
#The ppp frame format software#
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. For the latest caveats and feature information, seeīug Search Tool and the release notes for your platform and software release. Your software release may not support all the features documented in this module.
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