Cisco 10000 - Manual (Page 40)

1-8
Cisco 10000 Series Router Software Configuration Guide
OL-2226-23
Chapter 1 Broadband Aggregation and Leased-Line Overview
Broadband Architecture Models
Figure 1-8 RBE Architectural Model
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). IP traffic of the client is encapsulated in RBE. The Cisco 10000 series router processes ARP
or DHCP requests and routes the client data packets toward their final destination, typically onto the ISP
or corporate network.
RBE to Virtual Routing and Forwarding Architecture
Figure 1-9 shows an RBE to VRF model.
Cisco 10000
ESR
RBE
sessions
Typically
OC-3/OC-12 ATM
100K routed
subscribers
Typically GigEthernet
or OC-12 POS IP
routed traffic
DHCP servers
ISP/corporate
network
Client
Client
Client
Client
ATM
network
EMS/NMS
RBE
sessions
76101