CHAPTER
18-1
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
18
Configuring Ethernet over MPLS
This chapter describes how to configure Ethernet over Multiprotocol Label Switching (EoMPLS) on the
ML-Series card.
This chapter includes the following major sections:
•
Understanding EoMPLS, page 18-1
•
Configuring EoMPLS, page 18-4
•
EoMPLS Configuration Example, page 18-9
•
Monitoring and Verifying EoMPLS, page 18-12
Understanding EoMPLS
EoMPLS provides a tunneling mechanism for Ethernet traffic through an MPLS-enabled Layer 3 core.
It encapsulates Ethernet protocol data units (PDUs) inside MPLS packets and using label stacking
forwards them across the MPLS network. EoMPLS is an Internet Engineering Task Force (IETF)
standard-track protocol based on the Martini draft, specifically the draft-martini-l2circuit-encap-mpls-01
and draft-martini-l2circuit-transport-mpls-05 sections.
EoMPLS allows service providers to offer customers a virtual Ethernet line service or VLAN service
using the service provider's existing MPLS backbone. It also simplifies service provider provisioning,
since the provider edge customer-leading edge (PE-CLE) equipment only needs to provide Layer 2
connectivity to the connected customer edge (CE) equipment.
Figure 18-1 shows an example of EoMPLS implemented on a service provider network. In the example,
the ML-Series card acts as PE-CLE equipment connecting to the Cisco GSR 12000 Series through an
RPR access ring. Point–to-point service is provided to CE equipment in different sites that connect
through ML-Series cards to the ML-Series card RPR access ring.
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