MPLS and VPN Architectures by Ivan Pepelnjak

By Ivan Pepelnjak

A realistic consultant to realizing, designing, and deploying MPLS and MPLS-enabled VPNs In-depth research of the Multiprotocol Label Switching (MPLS) structure certain dialogue of the mechanisms and lines that represent the structure find out how MPLS scales to help tens of hundreds of thousands of VPNs vast case reviews advisor you thru the layout and deployment of real-world MPLS/VPN networks Configuration examples and instructions help in configuring MPLS on Cisco® units layout and implementation techniques assist you construct numerous VPN topologies Multiprotocol Label Switching (MPLS) is an cutting edge approach for high-performance packet forwarding. there are numerous makes use of for this new know-how, either inside of a service-provider atmosphere and in the company community, and the main largely deployed utilization this present day is the permitting of digital deepest Networks (VPNs). With the creation of MPLS-enabled VPNs, community designers may be able to greater scale their networks than with the equipment to be had some time past. community engineers and directors want quickly, powerful schooling in this know-how to successfully set up MPLS-enabled VPNs inside their networks. With that aim in brain, MPLS and VPN Architectures offers an in-depth dialogue specific to Cisco's MPLS structure. This e-book covers MPLS conception and configuration, community layout matters, and case experiences in addition to one significant MPLS software: MPLS-based VPNs. The MPLS/VPN structure and all its mechanisms are defined with configuration examples, instructed layout and deployment guidance, and vast case reports. MPLS and VPN Architectures is your sensible consultant to figuring out, designing, and deploying MPLS and MPLS-based VPNs.

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During the last four years at Cisco, Jim has been involved in the design, implementation, and planning of many large-scale WAN and LAN networks. His breadth of industry knowledge, hands-on experience, and understanding of complex internetworking architectures have enabled him to provide a detailed insight into the new world of MPLS and its deployment. com. si), a high-tech data communications company focusing on providing high-value services in new-world Service Provider technologies. Ivan has more than 10 years of experience in designing, installing, troubleshooting, and operating large corporate and service provider WAN and LAN networks, several of them already deploying MPLS-based Virtual Private Networks.

An Edge-LSR is a router that performs either label imposition (sometimes also referred to as push action) or label disposition (also called pop action) at the edge of the MPLS network. Label imposition is the act of prepending a label, or a stack of labels, to a packet in the ingress point (in respect of the traffic flow from source to destination) of the MPLS domain. Label disposition is the reverse of this and is the act of removing the last label from a packet at the egress point before it is forwarded to a neighbor that is outside the MPLS domain.

Note Because Cisco Express Forwarding (CEF) is the only Layer 3 switching mechanism that uses the FIB table, CEF must be enabled in all the routers running MPLS and all the ingress interfaces receiving unlabeled IP packets that are propagated as labeled packets across an MPLS backbone must support CEF switching. The core routers do not perform CEF switching—they just switch labeled packets—but they still must have CEF enabled globally for label allocation purposes. The entry in the FIB (shown in Example 2-1) indicates that the San Jose POP router should forward the IP packet it just received as a labeled packet.

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