© 2005 Cisco Systems, Inc. All rights reserved. MPLS v2.24-1 Module Summary VPNs replace dedicated links with virtual point-to-point links on common infrastructure,

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© 2005 Cisco Systems, Inc. All rights reserved. MPLS v Module Summary VPNs replace dedicated links with virtual point-to-point links on common infrastructure, reducing operating costs for customers. VPNs are categorized based on business need or connectivity requirement. MPLS VPNs prepends RDs to make unique customer addresses, and forwards traffic based on RTs. PE routers provide customer VPN routing and services through MP-BGP, while CE routers run standard IP routing protocols Label stacking is used in forwarding packets across the MPLS VPN backbone.

© 2005 Cisco Systems, Inc. All rights reserved. MPLS v2.24-2