By Ivan Pepelnjak
ISBN-10: 1578701651
ISBN-13: 9781578701650
A functional 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 aid tens of millions of VPNs
- Extensive case experiences advisor 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 quite a few VPN topologies
Multiprotocol Label Switching (MPLS) is an leading edge process for high-performance packet forwarding. there are numerous makes use of for this new expertise, either inside a service-provider setting and in the firm community, and the main broadly deployed utilization this present day is the permitting of digital deepest Networks (VPNs). With the advent of MPLS-enabled VPNs, community designers may be able to greater scale their networks than with the tools to be had within the past.
Network engineers and directors desire fast, powerful schooling in this expertise to successfully installation MPLS-enabled VPNs inside their networks. With that target in brain, MPLS and VPN Architectures offers an in-depth dialogue specific to Cisco's MPLS structure. This publication covers MPLS idea and configuration, community layout concerns, and case reports 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 sensible consultant to realizing, designing, and deploying MPLS and MPLS-based VPNs.
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Additional resources for Cisco Press MPLS and VPN Architectures
Sample text
If no loopback interfaces are configured on the router, the TDP identifier becomes the highest IP address of any interface that was operational at the TDP process startup time. Note The IP address used as the TDP identifier must be reachable by adjacent LSRs; otherwise, the TDP/LDP session cannot be established. Label Binding and Distribution As soon as the Label Information Base (LIB) is created in a router, a label is assigned to every Forward Equivalence Class known to the router. For unicast destination-based routing, the FEC is equivalent to an IGP prefix in the IP routing table.
Using these VCs, you can establish MPLS forwarding and label distribution between two endpoint devices in exactly the same way as over any other type of interface that operates in Frame-mode. This means that the label distribution across the interface is unsolicited downstream with independent label control. Figure 4-1 provides an example of this type of connectivity. 57 Figure 4-1 MPLS Connectivity Across Frame Relay PVCs Figure 4-1 illustrates two routers connected across a Frame Relay network.
Note Because the top-of-stack label is not used by the egress edge ATM-LSR, it is set to 0 by the ingress ATM edge-LSR before the labeled packet is segmented in ATM cells. The major differences between frame-based label switching and cell-based label switching are listed here: • • Label lookup in frame-based label forwarding is performed based on the top-of-stack label in the MPLS label header. In cell-based forwarding, the lookup is performed on the VPI/VCI values in the ATM cell headers. The switching mechanism in cell-based label switching is traditional ATM cell switching based on VPI/VCI values in the cell headers.
Cisco Press MPLS and VPN Architectures by Ivan Pepelnjak
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