Cisco BPX 8650, Installation And Configuration Manual

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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
Chapter 1 The BPX Switch: Functional Overview
BPX Switch Operation
–
No VPN knowledge in core
– No need for separate VC mesh per VPN
•
Highly Scalability
•
Ease of using new sites
Configure one site on one edge router or switch and network automatically does the rest.
•
Traffic Separation in MPLS
Each packet has a label identifying the destination VPN and customer site, providing the same level
of privacy as Frame Relay.
• Flexible Service Grouping
A single structure can support multiple services, such as voice VPNs, extranets, intranets, Internet,
multiple VPNs.
Figure 1-3 MPLS VPNs Example
Frame Relay to ATM Interworking
Interworking lets you retain your existing services and migrate to the higher bandwidth capabilities
provided by BPX switch networks, as your needs expand. Frame Relay to ATM Interworking enables
Frame Relay traffic to be connected across high-speed ATM trunks using ATM-standard Network and
Service Interworking.
Two types of Frame Relay to ATM interworking are supported:
• Network Interworking (see Figure 1-4.)
–
Performed by the UXM card on the IGX switch
–
Performed by the FRSM card on the MGX 8220
•
Service Interworking (see Figure 1-5.)
–
Supported by the FRSM card on the MGX 8220
–
Supported by the UFM cards on the IGX switch
IP Based VPNs
VPN A
VPN B
VPN B
VPN D
VPN D
VPN A
VPN A
VPN D
VPN B
VPN C
VPN C
MPLS VPN Services
Customer sites connected to
network with Frame Relay,
ATM, xDSL, etc.
Customer sites have ordinary
IP equipment, don't need MPLS
or special VPN equipment.
Provides advantages of IP connectionless
flexibility combined with QoS and
performance advantages of ATM.
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