Pta To Virtual Routing And Forwarding Architecture - Cisco 10000-2P2-2DC Software Configuration Manual

Chapter 1 Broadband Aggregation and Leased-Line Overview
Figure 1-1
In the figure, an ATM network (with no routing capability) is between the clients and the
Cisco 10000 series router. Each client session arrives on a VC (multiple sessions and PCs can use this
single VC). The IP traffic of the client is encapsulated in PPPoX. The Cisco 10000 series router
terminates the PPP sessions and routes the client data packets toward their final destination, typically
onto the ISP or corporate network.
Note PPPoX refers to either PPPoA or PPPoE.

PTA to Virtual Routing and Forwarding Architecture

Figure 1-2
model for PPPoA or PPPoE sessions.
OL-2226-23
PTA Architectural Model
Client
PPPoX
sessions
Client
Client
PPPoE
sessions
Client
shows a PPP termination and aggregation (PTA) to virtual routing and forwarding (VRF)
OC-3/OC-12 ATM
Cisco 10000
ESR
ATM
network
EMS/NMS
AAA servers
Cisco 10000 Series Router Software Configuration Guide
Broadband Architecture Models
Routed
subscribers
ISP/corporate
network
GigEthernet or
OC-12 POS IP
routed traffic
1-3