An administrator is configuring a secondary IPv4 static route on router R1 to reach networ… — Cisco CCNA

An administrator is configuring a secondary IPv4 static route on router R1 to reach network $10.50.0.0/16$ via next-hop $192.168.2.2$ . A primary static route to the same destination network via next-hop $192.168.1.2$ already exists in the active configuration with default settings. The secondary route must serve strictly as a backup and only enter the routing table if the primary path fails. Which Cisco IOS command should be configured on router R1?

ip route 10.50.0.0 255.255.0.0 192.168.2.2 10Answer
B
ip route 10.50.0.0 255.255.0.0 192.168.2.2 1
C
ip route 10.50.0.0 255.255.0.0 192.168.2.2 0
D
ip route 10.50.0.0 255.255.0.0 192.168.2.2

Answer

The correct command is `ip route 10.50.0.0 255.255.0.0 192.168.2.2 10`.

The command configuring an administrative distance of 10 creates a floating static route. Because Cisco IOS static routes default to an administrative distance of 1, setting the backup route's distance to 10 ensures it remains inactive until the primary route fails.

Step-by-Step Solution

Identify the administrative distance of the existing primary static route.

Standard static routes configured without an explicit distance parameter use a default administrative distance (AD) of

1

Administrative distance determines route trustworthiness in the Cisco IOS routing table.

Determine the required administrative distance for a floating static backup route.

The backup route must have an AD strictly greater than

1

(such as

10

Routes with higher AD values are ignored by the routing engine until all lower-AD routes for the identical prefix become unreachable.

Construct the Cisco IOS static route command syntax incorporating the distance parameter.

Syntax: `ip route <prefix> <mask> <next-hop> <distance>`. Applying parameters yields `ip route 10.50.0.0 255.255.0.0 192.168.2.2 10`.

Appending an administrative distance higher than

1

creates a floating static route.

Key Concept

Floating static routes rely on configuring an Administrative Distance higher than the primary routing source so that the backup route remains dormant in the configuration until the primary route drops out of the routing table.

Estimated Time:1m 30s

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