What is default administrative distance for BGP?

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Administrative distance is the first criterion that a router uses to determine which routing protocol to use if two protocols provide route information for the same destination….Default Distance Value Table.

What is the default administrative distance?

The administrative distance is an integer that is associated with each route known to a router. The distance represents how reliable the source of the route is considered to be. The range for administrative distance is 0–255. The default value is 120 for RIP routes and 110 for OSPF routes.

What is the administrative distance value of the route?

Administrative Distance (AD) is a value that routers use in order to select the best path when there are two or more different routes to the same destination from two different routing protocols. Administrative Distance counts the reliability of a routing protocol.

What is the administrative distance of OS?

For example, Cisco routers, routes issued by OSPF have a lower default administrative distance than routes issued by the Routing Information Protocol. By default, OSPF has a default administrative distance of 110 and RIP has a default administrative distance of 120.

Which type of route has an administrative distance of 1?

Understanding Administrative Distance

How is administrative distance calculated?

You can display the administrative distance of all routes on your router by typing the show ip route command:

1. In the case above, the router has only a single route in its routing table learned from a dynamic routing protocols – the EIGRP route.
2. Metric.
3. RIP has been configured on all routers.

Can administrative distance be changed?

The administrative distance is only local and can be different for each router. The administrative distance can be modified.

Which one has is the lowest administrative distance?

A directly connected will always have the lowest, at 0. A static route will always have an AD of 1, EIGRP is 90, and OSPF is 110.

What is an administrative distance of 0 mean?

An administrative distance is a number between 0 and 255, with the lower number being better. The AD of 0 indicates the most trusted route (the directly connected network). The AD of 255 means that the route will not be trusted.

What are the default values for administrative distance?

This table lists the administrative distance default values of the protocols that Cisco supports: Route Source Default Distance Values IGRP 100 OSPF 110 Intermediate System-to-Intermediate Syst 115 Routing Information Protocol (RIP) 120

What happens if the administrative distance is 255?

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.

How is administrative distance used in routing table?

The value is used by vendor-specific routers to rank routes from most preferred (low administrative distance value) to least preferred (high administrative distance value). When multiple paths to the same destination are available in its routing table, the router uses the route with the lowest administrative distance.

What is the default administrative distance of a static route?

as Gautam said, the default administrative distance of static routes is 1. You might be confusing the concept of least specific and administrative distance. If you have a static default route: ip route 0.0.0.0 0.0.0.0 Dialer1. this static route has an administrative distance of 1, and packets would only be routed out interface Dialer 1