...................................................................................................................................................................................................................................

Introduction

1643 Access Multiplexer AM / 1643 Access Multiplexer Small AMS support the

following schemes for the mapping of Ethernet packets into SDH frames:

• Link Access Procedure SDH (LAPS encapsulation)

• Ethernet over SDH (EoS encapsulation)

• Generic Framing Procedure (GFP encapsulation)

LAPS encapsulation

LAPS encapsulation is implemented according to ITU-T X.86. It is supported when

using the respective option card.

EoS encapsulation

EoS encapsulation is implemented according to T1X1.5/99-268. It is supported when

using the option card X4IP.

GFP encapsulation

GFP encapsulation is implemented according to T1X1.5/2000-147. It is supported when

using the X8PL, X4IP, and X5IP option cards.

GFP provides a generic mechanism to adapt traffic from higher-layer client signals

over a transport network.

The following GFP encapsulation are possible:

• Mapping of Ethernet MAC frames into Lower Order SDH VC12–Xv

• Mapping of Ethernet MAC frames into Lower Order SDH VC3–Xv

VC12–Xv GFP encapsulation

The 1643 Access Multiplexer AM / 1643 Access Multiplexer Small AMS supports

virtual concatenation of Lower Order SDH VC-12 as an inverse multiplexing technique

to size the bandwidth of a single internal WAN port for transport of encapsulated

Ethernet and Fast Ethernet packets over the SDH/SONET network. This is noted

VC12-Xv, where X = 1...5 when using the X4IP option card and X = 1...63 when

using the X8PLoption card. Usage is in conformance with ITU-T G.707 Clause 11

(2000 Edition) and G.783 Clause 12.5 (2000).

Additionally, the use of G.707 Extended Signal Label is supported using V5 (bits 5-7)

field.

VC3–Xv GFP encapsulation

The 1643 AM / 1643 AMS support virtual concatenation of Lower Order SDH VC-3

as inverse multiplexing technique to size the bandwidth of a single internal WAN port

for transport of encapsulated Ethernet and Fast Ethernet packets over the SDH/SONET

365-312-801R7.2

Issue 3, May 2007

Alcatel-Lucent - Proprietary

See notice on first page

2-15

Table of Contents

Show Quick Links

Hide quick links:

Table of Contents

This manual is also suitable for:

1643 am

Ethernet Mapping Schemes - Alcatel-Lucent 1643 AMS Applications And Planning Manual