Interaction With Other Features; Eompls And 802.1Q Tunneling - Cisco Catalyst 3750 Software Configuration Manual

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Configuring MPLS and EoMPLS

The point-to-point VC requires you to configure VC endpoints at the two PE routers. Only the PE routers

at the ingress and egress points of the MPLS backbone know about the VCs dedicated to transporting

Layer 2 traffic. Other routers do not have table entries for these VCs.

This section includes additional information about these topics:

Interaction with Other Features

This section describes how EoMPLS interacts other features. It includes these sections:

IEEE 802.1Q tunneling enables service providers to use a single VLAN to support customers who have

multiple VLANs, while preserving customer VLAN IDs and segregating traffic in different VLANs. For

more information about 802.1Q tunneling, see

Protocol Tunneling."

over an MPLS network. To support 802.1Q tunneling in a topology where a Layer 2 device connects to

an MPLS network through a switch functioning as a PE, the ingress LAN port on the PE that receives

the 802.1Q tunnel-encapsulated traffic (PE1) is configured as a tunnel port that accepts VLAN 100

traffic. On PE1, the interface is configured for port-based EoMPLS forwarding, with PE2 as the

destination IP address. When packets from VLANs 10 to 50 arrive from CE1, they are encapsulated in

VLAN 100 and sent to the PE1 egress port that is connected to the MPLS network. At the egress port,

an MPLS tag is added to the frame header before it is mapped to a VC and forwarded to the next MPLS

Figure 30-4 EoMPLS Example

Interaction with Other Features, page 30-13

EoMPLS Limitations, page 30-14

EoMPLS and 802.1Q Tunneling, page 30-13

EoMPLS and Layer 2 Tunneling, page 30-14

EoMPLS and QoS, page 30-14

is an example configuration where 802.1Q-tunneled traffic is forwarded using EoMPLS

encapsulated in

Chapter 13, "Configuring IEEE 802.1Q and Layer 2

encapsulated in

Catalyst 3750 Metro Switch Software Configuration Guide

Understanding EoMPLS

(VLAN 100 tag