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What does routing loop mean?
A routing loop is a serious network problem which happens when a data packet is continually routed through the same routers over and over. The data packets continue to be routed within the network in an endless circle. Normally Routing Loop is a problem associated with Distance Vector Protocols.
What solves the routing loop problem?
The destination sequence – distance vector method can be a solution to prevent the routing loop, so that the count to infinity problem can be solved in the protocol routing distance vector. Routing is a process routing data from one network to other network.
What are two reasons for the occurrence of a routing loop?
A routing loop is a situation where a packet keeps getting routed between two or more routers because of problems in the routing table. In case of distance vector protocols, the fact that these protocols route by rumor and have a slow convergence time can cause routing loops.
How does RIP prevent routing loops?
Routing Information Protocol or RIP has a feature called “route poisoning” which prevents routing loops by setting the hop count to 16. This hop count makes the route unreachable.
What is the purpose of a routing loop?
A routing loop is a confusion about the reachability of a destination network. Routing loops not only consume a lot of precious network bandwidth but also cause the router to believe that an inaccessible network is accessible. What causes a routing loop?
How does distance vector routing prevent routing loops?
To eliminate any possibility of forming routing loops due to the physical loops of the network, distance-vector routing protocols add only one best route for each destination in the routing table. But, this feature does not prevent routing loops that are caused by differences between routing update timers.
Why does my routing loop give me an expired packet?
Most routing loops give you an expired packet, so by using the ping or traceroute commands, you can quickly identify the issue though output similar to what you have seen. The lengthier task may be identifying the exact source of the problem, as it likely does with one routing table entry on one router.
What causes the same hops in a routing loop?
This is most easily detected with traceroute where you will see the same hops recurring over and over, or ping where you will see a message like “ttl expired in transit”. Routing loops are always caused by misconfiguration although it is not always as obvious as two static routes that point to eachother.