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Difficulty: MediumIPv4 Static Routing

A network engineer must configure router R1 with a primary static route to reach destination subnet 192.168.20.0/24192.168.20.0/24 using next-hop IPv4 address 10.1.12.210.1.12.2. Additionally, a backup (floating) static route to the same destination subnet must be configured using next-hop IPv4 address 10.1.14.210.1.14.2 so that it only enters the routing table if the primary path becomes unavailable. Which TWO static route configuration commands must be applied on router R1 to satisfy these requirements? (Select TWO.)

  1. ip route 192.168.20.0 255.255.255.0 10.1.12.2Answer
  2. ip route 192.168.20.0 255.255.255.0 10.1.14.2 10Answer
  3. C
    ip route 192.168.20.0 255.255.255.0 10.1.14.2 1
  4. D
    ip route 192.168.20.0 255.255.255.0 10.1.12.2 255

Answer

The primary path requires the standard command 'ip route 192.168.20.0 255.255.255.0 10.1.12.2' (default AD of 1), while the backup path requires 'ip route 192.168.20.0 255.255.255.0 10.1.14.2 10' with a higher administrative distance.
To create a primary and backup static route relationship, the primary route is configured with the standard static syntax 'ip route 192.168.20.0 255.255.255.0 10.1.12.2', which defaults to an administrative distance of 1. The backup (floating) static route is configured with an administrative distance value strictly greater than the primary route's AD (such as 10) via 'ip route 192.168.20.0 255.255.255.0 10.1.14.2 10'. This ensures the backup route remains inactive until the primary route drops from the routing table.

Step-by-Step Solution

1
Identify the proper Cisco IOS static route syntax.
The command syntax is 'ip route <destination-prefix> <subnet-mask> <next-hop-ip> [administrative-distance]'.
This establishes reachability to the destination network via a specified next-hop address.
2
Determine the administrative distance (AD) for the primary static route.
Reaching 192.168.20.0/24 via 10.1.12.2 uses the default static AD of 1.
Static routes without an explicit distance parameter default to an AD of 1.
3
Determine the administrative distance required for a floating static backup route.
The backup path via 10.1.14.2 requires an AD greater than 1 (such as 10).
A higher AD keeps the route out of the routing table until the lower AD primary route fails.

Key Concept

IPv4 Floating Static Route Configuration and Administrative Distance
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Topics

IPv4 Static Routing

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