Cisco Systems 3825 manual Emulation of TDM Circuit via MPLS/IP PWE3/TDM

Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router

New Features in Cisco IOS Release 12.4(16)MR1

•Emulation of TDM Circuit via MPLS/IP (PWE3/TDM), page 1-14

–Structure-agnostic TDM over Packet (SAToP), page 1-16

–Structure-aware TDM CESoPSN, page 1-16

•Transportation of ATM Service via MPLS/IP (PWE3/ATM), page 1-17

–Transparent Cell Transport Service/ATM Port Mode, page 1-17

–ATM N-to-One VCC Cell Mode, page 1-17

–ATM AAL5 CPCS-SDU Mode, page 1-18

–ATM One-to-One VCC Cell Mode, page 1-18

•Transportation of ATM Service via L2TPv3, page 1-20

–ATM Port Cell Relay Service, page 1-20

–ATM VCC Cell Relay Service, page 1-20

–ATM AAL5-SDU Mode, page 1-21

•Asymmetric PWE3, page 1-22

•Ethernet over MPLS, page 1-23

–VLAN Mode, page 1-23

–Port Mode, page 1-23

•PWE3 over MLPPP, page 1-24

•PWE3 Redundancy, page 1-24

–TDM PWE3 Redundancy, page 1-25

–ATM PWE3 Redundancy, page 1-25

–Ethernet PWE3 Redundancy, page 1-25

•Maximum Number of Supported ATM Ports, page 1-26

•ATM Cell Switching, page 1-26

Emulation of TDM Circuit via MPLS/IP (PWE3/TDM)

PWE3 is a mechanism that emulates the essential attributes of a T1/E1 line over a packet-switched network (PSN). This evolutionary technology allows you to migrate all packet networks from legacy TDM networks, yet provides transport for legacy applications. PWE3/TDM emulates T1/E1 unstructured and structured lines, including NxDS0 circuits over a Multiprotocol Label Switching (MPLS) infrastructure.

Configuration for provisioning and creating the PW is done through the existing xconnect interface.

A new command cem-grouphas been added to this feature to create a circuit emulation (CEM) channel from one or more time slots of T1/E1.

The group-numberkeyword identifies the group number used for this channel.

•For T1 controller, the range is 0-23. (24 cem-groups id)

•For E1 controller, the range is 0-30. (30 cem-groups id)

Use the unframed keyword to specify that a single CEM channel is being created, including all time slots with no framing structure defined. If time slots are defined, the PWE3 circuit is circuit emulation service over packet-switched network (CESoPSN).

	Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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