By Ivan Pepelnjak
A sensible consultant to realizing, designing, and deploying MPLS and MPLS-enabled VPNs
- In-depth research of the Multiprotocol Label Switching (MPLS) structure
- Detailed dialogue of the mechanisms and lines that represent the structure
- Learn how MPLS scales to help tens of hundreds of thousands of VPNs
- Extensive case experiences consultant you thru the layout and deployment of real-world MPLS/VPN networks
- Configuration examples and guidance help in configuring MPLS on Cisco® units
- Design and implementation thoughts assist you construct a variety of VPN topologies
Multiprotocol Label Switching (MPLS) is an cutting edge strategy for high-performance packet forwarding. there are lots of makes use of for this new know-how, either inside a service-provider atmosphere and in the firm community, and the main broadly deployed utilization at the present time is the allowing of digital inner most Networks (VPNs). With the creation of MPLS-enabled VPNs, community designers may be able to higher scale their networks than with the equipment to be had within the past.
Network engineers and directors want quickly, potent schooling in this expertise to successfully installation MPLS-enabled VPNs inside of their networks. With that objective in brain, MPLS and VPN Architectures presents an in-depth dialogue specific to Cisco's MPLS structure. This e-book covers MPLS concept 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, urged layout and deployment instructions, and huge case studies.
MPLS and VPN Architectures is your functional advisor to figuring out, designing, and deploying MPLS and MPLS-based VPNs.
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Additional info for Cisco Press MPLS and VPN Architectures
252 tag-switching ip frame-relay interface-dlci 164 To confirm the TDP relationship between the two routers, use the show tag-switching tdp neighbor command, as shown in Example 4-2. This command confirms that your TDP session is established across the Frame Relay interface and that unsolicited downstream label distribution is in effect. , implementation of Frame Relay. The first is to use Cisco encapsulation (the default) and the second is to use RFC 1490 (IETF) encapsulation. MPLS forwarding and control functions across either encapsulation.
These values are local to an incoming or outgoing interface; the same VPI/VCI value denotes a different VC when used on a different interface. The VC lookup operation in an ATM switch is exceedingly simple: The incoming interface and the VPI/VCI value in the incoming cell are used to look up the outgoing interface and the outgoing VPI/VCI value. The ATM technology design and architecture present a number of challenges to an ATM implementation of MPLS technology, all of which will be discussed in this chapter: • • • Control-plane IP packets cannot be exchanged directly over an ATM interface.
You can see how this feature can be used in the migration of an ATM network toward MPLS in the migration example in Chapter 6. This type of connectivity is possible through the use of sub-interfaces with different subinterface types on the router's ATM interface configuration. These sub-interfaces can be configured to run Cell-mode MPLS (sub-interface type tag-switching), or they can be configured to run Frame-mode (sub-interface type point-to-point). Figure 4-4 illustrates this technique. Figure 4-4 Frame-mode and Cell-mode MPLS Across the Same ATM Interface The example topology in Figure 4-4 shows that the San Jose and Paris routers have a point-to-point PVC connection between them but they also run Cell-mode MPLS directly with the MPLS ATM switch.