CHAPTER 2
Overview of Circuit Emulation
Circuit Emulation (CEM) is a technology that provides a protocol-independent transport over IP/MPLS
networks. It enables proprietary or legacy applications to be carried transparently to the destination, similar
to a leased line.
CEM provides a bridge between a Time-Division Multiplexing (TDM) network and Multiprotocol Label
Switching (MPLS) network. The chassis encapsulates the TDM data in the MPLS packets and sends the data
over a CEM pseudowire to the remote Provider Edge (PE) chassis. As a result, CEM functions as a physical
communication link across the packet network.
The chassis supports the pseudowire type that utilizes CEM transport: Structure-Agnostic TDM over Packet
(SAToP).
L2VPN over IP/MPLS is also supported on the interface modules.
• Configuring Pseudowire, on page 17
Configuring Pseudowire
Cisco Pseudowire Emulation Edge-to-Edge (PWE3) allows you to transport traffic by using traditional services
such as T1/E1 over a packet-based backhaul technology such as MPLS or IP. A pseudowire (PW) consists
of a connection between two provider edge (PE) chassis that connects two attachment circuits (ACs), such as
T1/E1 or T3 /E3 links.
CEM is supported only on Cisco NCS 4206 and Cisco NCS 4216.
Note
Information About Pseudowire
The following sections describe how to configure pseudowire on the interface module of the chassis.
Restrictions for CEM
The framed command is not supported.
48-Port T1/E1 CEM Interface Module Configuration Guide, Cisco IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
17
To Next Page
Loading...
Need help?
General
