Introduction to Hybrid Routing Protocol

The protocol, Hybrid Routing protocol is designed by combining the characteristics of both link-state routing protocol and the distance vector routing protocol. The advantages of these two protocols are combined and formed the new protocol called Hybrid routing protocol. In most of the cases, this protocol is based on the distance-vector protocol. Even if it is based on the distance-vector protocol, it will also have the advantages of the second one protocol(link-state routing protocol). A good example of this protocol is the Enhanced Interior Gateway Protocol.

The above-mentioned protocol, EIGRP, has the characteristics of both link-state and distance-vector protocol and tats why it is considered as the hybrid routing protocol. As the OSPF(OpenShortest  Path First) does, the EIGRP(Enhanced Interior Gateway Routing Protocol ) will not send the LSA  packets(Link State Advertisement). Instead, it will send the distance vector updates. This updates will contain the following information:

  • Information regarding the network.
  • Cost of reaching the destination router from the router which it is advertised.

Even the hybrid routing protocol combiners the features of the link-state protocol with the EIGRP, the EIGRP also possesses the advantages of the link-state protocol. Between the neighbors, at startup, the EIGRP protocol synchronizes the routing table. And if there any updation in the network topology, it will send a particular update to the router and routing table.

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This type of routing protocol is commonly called as balanced-hybrid routing. This protocol will undergo the routing algorithm’s third classification. To get increased accurate matrices, that are used to find the best path to the destination in the network, this protocol will use the distance vector protocol.

The routing information will report only when there are any changes happen in the network topology.

Advantages:

  1. This protocol only uses less processing power than a link-state protocol.
  2. This protocol only uses less processing memory than link-state protocol.
  3. It causes rapid convergence.

Characteristics:

  • Combines the characteristics of link-state routing protocol and Enhanced Interior Gateway Routing Protocol.
  • Sends LSA packets.
  • The best example is EIGRP.
  • Sends updates if the topology changes.
  • Generally called as Balanced-Hybrid routing.
  • Use the destination vector protocol for accurate matrices.
  • It only uses less processing power.
  • It only uses less processing memory.
  • It causes rapid convergence.
  • through reactive flooding, it also handles the activated nodes.
  • This protocol differentiates all proactive and reactive routing advantages.

Some of the examples are listed:

  1. EIGRP
  2. ZRP
  3. CEDAR
  4. ZHLS

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