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Routing Information Protocol - Basics

  • Dynamic routing protocol
  • Administrative distance - 120
  • Metric for best path selection - Hop count (Route with lowest hop count preferred)
  • Maximum hop count allowed - 15
  • Route is considered unreachable for hop count - 16
  • RIP versions - RIP version 1, RIP version 2, RIP-NG

RIP version 1

  • Classful routing protocol i.e. doesn't send subnet mask information in the update messages
  • Sends periodic updates as broadcast
  • Destination IP address for broadcast -
  • Doesn't support authentication of update messages

RIP version 2

  • Classless routing protocol but does support classful
  • Sends periodic updates as multicast
  • Destination IP address for multicast -
  • Supports authentication of update messages


  • Classless routing protocol (of course, this is IPv6 we are talking about)
  • Sends periodic updates as multicast
  • Destination IPv6 address for multicast - FF02::9


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