Ethernet Interworking Vll; Figure 15: Application Of Ethernet Interworking Vll Example - Alcatel-Lucent 7750 SR OS Service Manual

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Ethernet Pipe (Epipe) Services

Ethernet Interworking VLL

ATM Switching/

RFC2684/RFC2427

provides a point-to-point Ethernet VLL service between Frame-Relay-attached users, ATM

attached users, and Ethernet-attached users across an IP/MPLS packet switched network. It

effectively provides ATM and FR bridged encapsulation termination on the existing Epipe service

of the 7750 SR.

The following connectivity scenarios are supported:

Users attach over an ATM UNI with RFC 2684, Multiprotocol Encapsulation over ATM

Adaptation Layer 5, tagged/untagged bridged Ethernet PDUs, a FR UNI using RFC 2427,

Multiprotocol Interconnect over Frame Relay, tagged/untagged bridged Ethernet PDUs, or an

Ethernet tagged/untagged UNI interface. However, the VCI/VPI and the data-link control layer

(DLCI) are the identifiers of the SAP in the case of ATM and FR respectively and the received tags

are transparent to the service and are thus preserved.

The Ethernet pseudowire is established using Targeted LDP (TLDP) signaling and can use the

ether or vlan VC types on the SDP. The SDP can be either an MPLS or GRE type.

Figure 2: Application of Ethernet Interworking VLL Example

provides an example of an Ethernet interworking VLL. The Ethernet interworking VLL

A Frame Relay or ATM user connected to a ATM network communicating with a Ethernet

user connected to a 7750 PE node on a IP/MPLS network.

A Frame Relay or ATM user connected to 7750 SR PE node communicating with an

Ethernet user connected to a 7750 PE node on a IP/MPLS network. This feature supports

local cross-connecting when these users are attached to the same 7750 PE node.

APS Protected

Interworking

7750 SR OS Services Guide

Ethernet-MPLS

Ethernet (VLAN)