Complete the Cisco IOS command required to configure a floating static backup route.

Answer:An edge router receives its primary path to destination subnet

172.20.10.0/24

via internal EIGRP, which carries a default Administrative Distance of

90

. A network engineer needs to configure a floating static backup route toward the same destination using next-hop IP

10.1.1.2

with an Administrative Distance of

100

.

What value should be entered to complete the Cisco IOS command below?

`ip route 172.20.10.0 255.255.255.0 10.1.1.2` 【100】

Answer

The missing parameter to complete the command is 100.

Appending the integer 100 to the end of the `ip route` syntax sets the static route's Administrative Distance to 100. Because 100 is higher than internal EIGRP's default AD of 90, the router will keep the static route inactive (floating) in the routing table until the primary EIGRP path becomes unavailable.

Step-by-Step Solution

Analyze the Cisco IOS static route command structure.

The command syntax is `ip route <prefix> <mask> <next-hop> [distance]`.

The optional trailing integer at the end of the command specifies the Administrative Distance (AD) for the route.

Determine the required Administrative Distance value for the floating static route.

The problem specifies an Administrative Distance of 100 for the backup route.

Setting the AD to 100 ensures the static route remains higher (less preferred) than the primary internal EIGRP route (AD 90), causing it to float outside the routing table until the primary path fails.

Key Concept

Floating Static Route Configuration and Administrative Distance

Estimated Time:1m 0s

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