RIP Timers Explained in Hindi | Routing Information Protocol Full Tutorial for Beginners in Hindi

RIP Timers (Routing Information Protocol) — Key Concepts

The video explains that RIP is a distance-vector routing protocol and it relies on four timers to function correctly and keep routing tables accurate.

1) Update Timer

• Purpose: Controls how often a RIP router sends routing table updates to neighboring routers.
• Default value: 30 seconds
• Effect: RIP is described as “chatty” because routers repeatedly send updates every 30 seconds.

2) Route Invalid Timer (Invalid Timer)

• Purpose: Defines how long RIP waits before marking a route as unreachable/invalid if updates stop arriving.
• Default value: 180 seconds (stated as 6× the update timer)
• Effect: If no update is received within this interval, the link/network is treated as unreachable.

3) Flush Timer

• Purpose: Removes invalid route entries from routing tables after the route has been marked invalid.
• Default value: 240 seconds
• Effect: During the flush interval, routers delete entries of invalid routes from their routing tables.

4) Hold-Down Timer

• Purpose: Helps eliminate/avoid routing loops in RIP (distance-vector protocols are prone to loops).
• Default value: 180 seconds
• Effect: After a route is considered invalid, that route is not re-accepted into routing tables for 180 seconds, preventing loop formation.

Main Takeaway

These timers work together to:

• periodically exchange routes (update),
• mark routes unreachable when updates stop (invalid),
• remove stale/invalid entries (flush),
• and prevent routing loops (hold-down).

Main Speakers / Sources

• Jagwinder (speaker)