Broadcast Networks

• These are network technologies such as Ethernet and FDDI

• Introduces Designated and Backup Designated routers (DR and BDR)

  • Only DR and BDR form full adjacencies with other routers
  • The remaining routers remain in a “2-way” state with each other
    • If they were adjacent, we’d have n-squared scaling problem
  • If DR or BDR “disappear”, re-election of missing router takes place

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