Intermedite System to Intermediate System(IS-IS) is a Interior Gateway Protocol(IGP) similar to OSPF. IS-IS attempts to find the most efficient route for data-grams using the Dijkstra's algorithm. It is commonly used within large ISPs for backbone routing.

Useful InformationEdit

  • IS-IS is a link state protocol
  • IS-IS is a layer 2 protocol
  • IS-IS build a database and topology of the network via link flooding
  • IS-IS is not commonly supported on rack type switches.
  • IS-IS is intended for use within Autonomous Systems