Cisco 3825 Software Configuration Guide - Page 24
Emulation of TDM Circuit via MPLS/IP (PWE3/TDM - technologies
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Page 24 highlights
New Features in Cisco IOS Release 12.4(16)MR1 Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router • 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-group has been added to this feature to create a circuit emulation (CEM) channel from one or more time slots of T1/E1. The group-number keyword 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). 1-14 Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide OL-15667-03