How RIP routing updates work

Summary

Key components in the RIP routing update process include:

  • RIP routers: Send and receive routing update messages to maintain network topology information

  • Routing tables: Store the best routes to destinations with associated metric values

  • Routing update messages: Contain network topology changes and route information

  • Metric values: Determine the best path, with routers maintaining only the lowest metric route

Workflow

The process involves these stages:

  1. RIP routers send routing-update messages at regular intervals and when the network topology changes.
  2. When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. The metric value for the path is increased by 1, and the sender is indicated as the next hop.
  3. RIP routers maintain only the best route to a destination, which is the route with the lowest metric value.
  4. After updating its routing table, the router immediately begins transmitting routing updates to inform other network routers of the change. These updates occur independently from regularly scheduled RIP routers updates.