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routing Protocols and Virtual private network
- 1. By SHUBHAM SHARMA FINAL YEAR(CS) [email_address]
- 2. DIFFERENT ROUTING PROTOCOLS RIP & RIP V2 (Routing Information Protocol ) IGRP (Interior Gateway Routing Protocol ) EIGRP (Enhanced IGRP ) OSPF ( Open Shortest Path First ) IS-IS ( Intermediate System to Intermediate System ) BGP ( Border Gateway Protocol )
- 3. Open Shortest Path First KEY FEATURES Link state routing loop free protocol Classless routing protocol Default AD value 110 Uses dijkastra algorithm Ospf packet types Hello packet Database descriptor Link state request Link state update Acknowledgement
- 4. Ospf Tables Neighbour tables Database tables Routing tables Ospf network types Point to point Broadcast network NBMA
- 5. INTERMEDIATE SYSTEM TO INTERMEDIATE SYSTEM Link state routing Protocol Is-Is build a topological representation of network Supports the larger network Inter area router Intra area router It do not use the backbone area [ edit ] Comparison with
- 6. Border gateway protocol BGP is a multi-vendor “open” protocol with multiple implementations. It is the only actively used EGP on the Internet. The main design feature of BGP was to allow ISPs to richly express their routing policy, both in selecting outbound paths and in announcing internal routes.
- 7. An Exterior Gateway Protocol (EGP), used to hundreds of thousands of routes between networks (ASs). BGP AND ASNs AS 4969 AS 5000 AS 6461 AS 701
- 8. iBGP vs. eBGP BGP is very strange. It is promiscuous with external routes, making it very easy , yet it makes it very hard to advertise routes thoroughly inside your network. iBGP sessions are established when peering with the same AS; eBGP otherwise. Same protocols; different route install rules. YOU MUST STRONGLY FILTER ALL eBGP SESSIONS!
- 9. What is a VPN
- 10. Private Networks vs. Virtual Private Networks Employees can access the network (Intranet) from remote locations. Secured networks. The Internet is used as the backbone for VPNs Saves cost tremendously from reduction of equipment and maintenance costs.
- 11. Three Protocols used in VPN PPTP -- Point-to-Point Tunneling Protocol L2TP -- Layer 2 Tunneling Protocol IPsec -- Internet Protocol Security
- 13. VPN Encapsulation of Packets
- 14. Advantages: Cost Savings Eliminating the need for expensive long-distance leased lines Reducing the long-distance telephone charges for remote access. Transferring the support burden to the service providers Operational costs
- 15. Disadvantages VPNs require an in-depth understanding of public network security issues and proper deployment of precautions Availability and performance depends on factors largely outside of their control VPNs need to accommodate protocols other than IP and existing internal network technology
- 16. Questions?