ACE-3105, ACE-3205 Ver. 5.2
1BBasic Pseudowire (PW) Encapsulation
E-1
Appendix
E
Encapsulation over PSN
This appendix describes the encapsulation of ATM and TDM cells, transported
over the packet-switched network (PSN) and handled by ACE-3105, ACE-3205.
This includes the following topics:
•
Basic Pseudowire (PW) Encapsulation
•
Encapsulation over Different PSN Types
– which describes:
•
– which describes:
One-to-One (1:1) ATM PW Encapsulation
N-to-One (N:1) ATM PW Encapsulation
•
– which describes:
•
.
E.1
Basic Pseudowire (PW) Encapsulation
A pseudowire (PW) packet comprises the following data components (see
):
•
Ethernet header – contains the DA (destination MAC address), SA (local MAC
address) and Ethernet network type.
•
PSN header – defines the PSN transport type: MPLS, UDP over IP,
MPLS over IP, MPLS over GRE and PPPoE.
•
Control Word – a data control as defined in the relevant IETF RFCs and drafts.
•
Payload – the service payload (ATM or TDM payload), which contains the
actual traffic data.
