Alcatel-Lucent 1643 AMS - Ethernet mapping schemes

Ethernet mapping schemes
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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
Features
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
2-15