Cisco Systems A9014CFD manual Mpls Label imposition LER Mpls Label switching LSR, 25-4

Chapter 25 Configuring MLPPP

MLPPP Optimization Features

•MPLS Features Supported for MLPPP

•MPLS over MLPPP on PE-to-CE Links

•MPLS over MLPPP on Core Links

•MPLS over MLPPP on CE to PE Links

MPLS Features Supported for MLPPP

The following features are supported.

•MPLS Label imposition (LER)

•MPLS Label switching (LSR)

•MPLS VPN (L3VPN): User-Network Interface (UNI) on which virtual routing and forwarding (VRF) is configured should be switch virtual interface (SVI) on Gigabit interfaces and Network-to-Network Interface(NNI) can be MLPPP link

•Routing Protocols – ISIS/OSPF/BGP on MLPPP

•Label Distribution Protocol (LDP) as MPLS label protocol

•Equal Cost Multipath (ECMP) support on MLPPP links for IP to Tag (LER cases)

MPLS over MLPPP on PE-to-CE Links

Figure 1 shows a typical MPLS network in which the PE router is responsible for label imposition (at ingress) and disposition (at egress) of the MPLS traffic.

In this topology, MLPPP is deployed on the PE-to-CE links.

Figure 1 PE to CE Links

CE

		LDP
LDP	P	P	LDP

CE

PE PE

CE

MLP interfaces handling

MPLS labeled packets

CE

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	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
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