Cisco Systems 10000 - page 10

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The Cisco 10000 Series offers a full range of ATM interfaces, from DS3/E3 copper through OC-12/STM-4. The
platformsupports ATM classes of service (CoSs), including UBR, UBR+, VBR-nrt, and CBR with extensive IP QoS
to ATM CoS interworking. A rich ATM feature set is supported, including accurate and scalable traffic shaping as
well as operations, administration, and maintenance (OAM) facilities.
Ethernet Aggregation
Ethernetis becoming more prevalent in metropolitan areas throughout the world, with many providers now offering
high-speed Internet and VPN access over local fiber-optic networks (Figure 10).
Figure 10
Ethernet Architecture
Many enterprise customers use Ethernet technology for the “hub” site within a VPN network. “Spoke” sites are
generallyconnected to the service provider’s infrastructure with lower speed fixed circuits, such as those mentioned
previously. Customer connections are usually defined as 802.1Q virtual LAN (VLAN) logical interfaces under the
main Ethernet interface. The Cisco 10000 Series supports both Gigabit and Fast Ethernet interfaces with a rich set
of high-value IP services, including QoS and ACLs.
MPLS Provider Edge Applications
Figure 11
MPLS Architecture
IP
Gigabit
Ethernet
IP
Ethernet
SONET/SDH
Cisco
10000
Series IP Network
Ethernet
Business
Customer
Cisco 10000
Series
Cisco 10000
Series
Provider Edge
Cisco 10000
Series
Provider
Edge
Customer
Edge
VPN-A
Office 1
(VPN-A)
Office 4
(VPN-B)
Office 2
(VPN-B)
Office 3
(VPN-A)
Customer
Edge
VPN-B
Provider Edge
MPLS Core
IP Network
Access Protocol IPMPLS VPN