Hands-On Network Device Virtualization With VRF (Virtual Routing and Forwarding)

Hands-On Network Device Virtualization With VRF (Virtual Routing and Forwarding)

Ganesh Chandra Deka (Government of India, India), Prashanta Kumar Das (Government Industrial Training Institute Dhansiri, India) and Rahul Borah (Network Bulls, India)
Copyright: © 2018 |Pages: 20
DOI: 10.4018/978-1-5225-2785-5.ch014
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Virtual Routing and Forwarding (VRF) is a technology that allows multiple instances of IP (Internet Protocol) routing table to co-exist within the same Router at the same time. The routing instances are independent, allowing the same or overlapping IP addresses to be used without conflict. Using VRF technology, users can virtualize a network device from a Layer 3 standpoint of creating different “Virtual Routers” in the same physical device. Internet Service Providers (ISP) often use VRF technology to create separate routing table in a single physical Router which are completely isolated one from the others. This chapter discusses about the configuration of VRF-Lite in GNS3 (Graphical Network Simulator-3) on RIP/v2, EIGRP and OSPF protocols.
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Virtual Private Network

A Virtual Private Network (VPN) is an IP network infrastructure delivering private network services over a public infrastructure using layer 3 backbone. MPLS is used within the backbone to switch packets, hence no need of full routing.

MultiProtocol Label Switching (MPLS) is a simple way of labeling each network layer packet. MPLS decouples forwarding from routing, enabling Multi-protocol support without requiring changes to the basic forwarding paradigm. MPLS improves the scalability of hop-by-hop routing and forwarding for providing traffic engineering capabilities for better network provisioning.

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