What happens when a router receives a route with an administrative distance of 255?

What happens when a router receives a route with an administrative distance of 255?

*If the administrative distance is 255, the router does not believe the source of that route and will not install the route in its routing table. When using route redistribution, occasionally there may be a need to modify the administrative distance of a protocol so that it takes precedence.

What is a Null0?

The null0 interface is primarily used when a router advertises a summary address. The idea is that this router has all the more specific routes and so if a packet is received for which the router has no matching route, rather than forward the packet on and potentially creating a routing loop, the packet is dropped ie.

What is ip route Null0?

The Null interface is typically used for preventing routing loops. Enhanced Interior Gateway Routing Protocol (EIGRP), for instance, always creates a route to the Null0 interface when it summarizes a group of routes.

Which routing protocol has the most trustworthy administrative distance by default?

By default, OSPF has a default administrative distance of 110 and RIP has a default administrative distance of 120.

What is null0 used for?

A null interface is a virtual interface that discards IP packets and is used to prevent routing loops from occurring in the network. You do not assign the null interface an IP address. Instead, you create a static route for a network and set the next hop to the null interface (null0).

What is the purpose of a null0 route in the routing table?

Null0 is a virtual interface that is a route to nowhere and is used to prevent routing loops for destinations that are included in a summary network but do not have a specific entry in the routing table.

What is null0 route Cisco?

Overview. A null interface is a virtual interface that discards IP packets and is used to prevent routing loops from occurring in the network. You do not assign the null interface an IP address. The Border Router then sends the traffic back to Router 1 via the route 10.10. 0.0/16.

What is null0 in Eigrp?

Null 0 is a virtual interface that’s used to guarantee routes make it into the RIB; remember, routes must have a next-hop in order to make it into the RIB. When a packet arrives at a device that has a route to Null 0 and nowhere else, it will discard it similar to how an ACL would.

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