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routing Protocols and Virtual private network
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routing Protocols and Virtual private network

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routing Protocols and Virtual private network routing Protocols and Virtual private network Presentation Transcript

  • By SHUBHAM SHARMA FINAL YEAR(CS) [email_address]
  • 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 )
  • 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
    View slide
  • Ospf Tables
    • Neighbour tables
    • Database tables
    • Routing tables
    • Ospf network types
    • Point to point
    • Broadcast network
    • NBMA
    View slide
  • 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
  • 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.
    • 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
  • 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!
  • What is a VPN
  • 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.
  • Three Protocols used in VPN
    • PPTP -- Point-to-Point Tunneling Protocol
    • L2TP -- Layer 2 Tunneling Protocol
    • IPsec -- Internet Protocol Security
  •  
  • VPN Encapsulation of Packets
  • 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
  • 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
    • Questions?