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Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 1 Broadband Aggregation and Leased-Line Overview
Broadband Architecture Models
To see if a feature is supported by a Cisco IOS release, to locate the software document for that feature,
or to check the minimum software requirements of Cisco IOS software with the hardware installed on
your router, Cisco maintains the Software Advisor tool on Cisco.com at
http://www.cisco.com/cgi-bin/Support/CompNav/Index.pl
You must be a registered user on Cisco.com to access this tool.
Broadband Architecture Models
This section shows broadband models for the following architectures:
• PPP termination and aggregation (PTA) for PPPoA or PPPoE
• PTA to virtual routing and forwarding (VRF)
• PTA to Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN)
• L2TP network server (LNS)
• L2TP to VRF
• L2TP over MPLS to VRF
• L2TP access concentrator (LAC)
• Routed bridge encapsulation (RBE)
• RBE to VRF
• RBE to MPLS VPN
PPP Termination and Aggregation Architectures
Figure 1-1 shows a PPP termination and aggregation (PTA) model for PPP over ATM (PPPoA) or PPP
over Ethernet (PPPoE) sessions.