Virtual Leased Line Services
7750 SR OS Services Guide Page 111
Epipe Service Overview
An Epipe service is Alcatel-Lucent’s implementations of an Ethernet VLL based on the IETF
“Martini Drafts” (draft-martini-l2circuit-trans-mpls-08.txt and draft-martini-l2circuit-encapmpls-
04.txt) and the IETF Ethernet Pseudo-wire Draft (draft-so-pwe3-ethernet-00.txt).
An Epipe service is a layer 2 point-to-point service where the customer data is encapsulated and
transported across a service provider’s IP or MPLS network. An Epipe service is completely
transparent to the subscriber’s data and protocols. The 7750 SR Epipe service does not perform
any MAC learning. A local Epipe service consists of two SAPs on the same node, whereas a
distributed Epipe service consists of two SAPs on different nodes. SDPs are not used in local
Epipe services.
Each SAP configuration includes a specific port/channel on which service traffic enters the 7750
SR from the customer side (also called the access side). Each port is configured with an
encapsulation type. If a port is configured with an IEEE 802.1Q (referred to as dot1q)
encapsulation, then a unique encapsulation value (ID) must be specified.
Figure 1: Epipe/VLL Service
OSSG021
Customer 1
Customer 2
Customer 2
Customer 1
EPIPE (VLL) Service 1
EPIPE (VLL) Service 2
IP/MPLS Network
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