Cisco 10000-2P2-2DC Software Guide - Page 426
Configuring Frame Relay over MPLS, Configuring Frame Relay over MPLS with DLCI-to-DLCI Connections
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Configuration Tasks for L2VPN Chapter 20 Configuring L2 Virtual Private Networks Configuring Frame Relay over MPLS Frame Relay over MPLS encapsulates Frame Relay protocol data units (PDUs) in MPLS packets and forwards them across the MPLS network. For Frame Relay, you can set up data-link connection identifier (DLCI)-to-DLCI connections or port-to-port connections. • With DLCI-to-DLCI connections, the PE routers manipulate the packet by removing headers, adding labels, and copying control word elements from the header to the PDU. • With port-to-port connections, you use HDLC mode to transport the Frame Relay encapsulated packets. In HDLC mode, the entire HDLC packet is transported. Only the HDLC flags and FCS bits are removed. The contents of the packet are not used or changed, including the FECN, BECN, and DE bits. Note Frame Relay traffic shaping is not supported with AToM-switched VCs. You can configure Frame Relay over MPLS in the following ways: • Configuring Frame Relay over MPLS with DLCI-to-DLCI Connections, page 20-28 • Configuring Frame Relay over MPLS with Port-to-Port Connections, page 20-29 • Enabling Other PE Devices to Transport Frame Relay Packets, page 20-30 Configuring Frame Relay over MPLS with DLCI-to-DLCI Connections To configure Frame Relay over MPLS with DLCI-to-DLCI connections, enter the following commands beginning in global configuration mode: Step 1 Step 2 Step 3 Step 4 Step 5 Command Router(config)# frame-relay switching Router(config)# interface serial slot/port Router(config-if)# encapsulation frame-relay [cisco | ietf] Router(config-if)# frame-relay intf-type dce Router(config-if)# exit Purpose Enables permanent virtual circuit (PVC) switching on a Frame Relay device. Specifies a serial interface and enters interface configuration mode. Specifies Frame Relay encapsulation for the interface. You can specify different types of encapsulations. You can set one interface to Cisco encapsulation and the other interface to IETF encapsulation. Specifies that the interface is a DCE switch. You can also specify the interface to support NNI and DTE connections. Exits from interface configuration mode. 20-28 Cisco 10000 Series Router Software Configuration Guide OL-2226-23
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