Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

The correct answer is B. administrative distance. Administrative Distance (AD) is the trustworthiness rating assigned to routing sources. Lower AD is preferred. A static route has a default AD of 1, which would normally beat any dynamic protocol. To make a static route act as a backup (floating static route), you increase its…

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Question

Which parameter would you tune to affect the selection of a static route as a backup, when a dynamic protocol is also being used?

Options

Ahop count
Badministrative distance
Clink bandwidth
Dlink delay
Elink cost

How the community answered

(29 responses)

A
7% (2)
B
90% (26)
C
3% (1)

Explanation

Administrative Distance (AD) is the trustworthiness rating assigned to routing sources. Lower AD is preferred. A static route has a default AD of 1, which would normally beat any dynamic protocol. To make a static route act as a backup (floating static route), you increase its AD to a value higher than the dynamic protocol's AD. For example, if OSPF (AD 110) is the primary, you'd configure the static route with an AD of 111 or higher (e.g., 'ip route 0.0.0.0 0.0.0.0 [next-hop] 120'). When the OSPF route exists, the static route is suppressed; if OSPF loses the route, the static route activates. Hop count, bandwidth, delay, and cost are route metrics used within a specific protocol - they don't control which routing source is preferred.

Topics

#administrative distance#static route#floating static route#route selection

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