Which Route Must Go Down for a Static Route to Appear?

Introduction To Cisco 200-301 Exam Actual Questions

Preparing for the Cisco 200-301 exam requires a deep understanding of networking concepts, including static and dynamic routing. One common question that arises is: "Which route would have to go down in order for this static route to appear in the routing table?" This is a critical topic for anyone aiming to pass the CCNA 200-301 exam and master network routing configurations.  

In this blog, we will explore:  

• The role of static routes in routing tables  
• How administrative distance (AD) affects route selection  
• Scenarios where a static route becomes active  
• Practical examples with Cisco 200-301 exam actual questions  

By the end, you'll have a clear understanding of when and why a static route appears in the routing table, helping you tackle similar questions in the Cisco 200-301 Exam Actual Questions.  

Understanding Routing Tables and Static Routes  

What Is a Routing Table?  

• A routing table is a database stored in a router that contains information about:  
• Directly connected networks  
• Remotely learned networks (via dynamic routing protocols like OSPF or EIGRP)  
• Statically configured routes  

The router uses this table to determine the best path for forwarding traffic.  

What Are Static Routes?  

Static routes are manually configured routes that define a specific path for traffic. Unlike dynamic routes (learned via protocols like OSPF or RIP), static routes do not change unless modified by an administrator. Knowing when it is more beneficial to use a dynamic routing protocol instead of static routing helps you decide which approach fits a given network.  

Example of a Static Route:  

• ip route 192.168.1.0 255.255.255.0 10.0.0.2  
• This command tells the router:  
• Destination Network: 192.168.1.0/24  
• Next-Hop IP: 10.0.0.2  

When Does a Static Route Appear in the Routing Table?  

A static route only appears in the routing table if:  

1. The next-hop IP is reachable (the router can ping it).  

2. No better route exists (based on Administrative Distance).  

For the configuration side of this, see how to ensure a static route appears in the routing table.

Key Concept: Administrative Distance (AD)  

Administrative Distance (AD) is a measure of trustworthiness of a route. Lower AD values are preferred. A backup static route deliberately configured with a higher AD than the primary route is called a floating static route — see what is a characteristic of a floating static route for how it behaves.  

Scenario: When a Static Route Takes Over  

Imagine a router has two possible paths to a network:  

1. Dynamic Route (OSPF, AD = 110)  

2. Static Route (AD = 1)  

The router will always prefer the static route because of its lower AD. However, if the static route’s next-hop becomes unreachable, the router will fall back to the OSPF route.  

Exam-Style Question:  

Which route would have to go down in order for this static route to appear in the routing table?"  

Answer:  

1. The static route will appear only if the currently active route (with a higher AD) fails. For example:  
2. If an OSPF route (AD=110) is currently in the routing table, the static route (AD=1) will only appear if the OSPF route goes down.  
3. If a directly connected route (AD=0) exists, the static route will never appear unless the connected interface fails.  

Practical Example: Static Route Activation  

Let’s consider a real-world scenario:  

Network Topology:  

Router A has two paths to Network X:  

Path 1: OSPF-learned route (AD = 110) via Router B  

Path 2: Static route (AD = 1) via Router C  

Current Routing Table:  

• O     192.168.1.0/24 [110/20] via 10.0.0.2  
• S     192.168.1.0/24 [1/0] via 10.0.0.3 (inactive)  

What Happens If the OSPF Route Fails?  

1. Router A detects that the OSPF route is no longer available.  

2. The static route (with AD=1) is now the best available path.  

3. The static route appears in the routing table and traffic flows via Router C.  

How This Applies to the Cisco 200-301 Exam  

The Cisco 200-301 Certification frequently tests your understanding of:  

• Route preference (AD values)  
• Static vs. dynamic route behavior  
• Troubleshooting routing issues  

Sample Exam Question:  

Q: A router has the following routes for 192.168.5.0/24:  

• A static route (AD=1) via 10.1.1.1  
• An OSPF route (AD=110) via 10.2.2.2  

Which route will be active, and under what conditions will the static route take over?  That scenario is tested head-on in CCNA 200-301: Which Route Must Go Down for a Static Route to Appear?.

Related guides

• Which option shows a correctly configured IPv4 default static route?
• Mastering IPv6 static routing for Cisco Certified Network Associate 200-301

Conclusion  

Understanding when a static route appears in the routing table is crucial for the Cisco 200-301 exam. Remember:  

1. Static routes (AD=1) are preferred over dynamic routes (e.g., OSPF, RIP).  

2. A static route only appears if no better (lower AD) route exists.  

3. If a higher AD route fails, the static route becomes active.  

Want more routing practice? Work through the Cisco 200-301 exam prep practice test and drill static routing scenarios until route selection feels automatic.

Official source: Cisco's official CCNA training and exam resources are available on the Cisco Learning Network.

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Sample Questions for Cisco 200-301 Exam

Actual exam question from Cisco's 200-301 Exam Prep Practice Tests

Which protocol is used by an IPv6-enabled host to automatically configure its own link-local address?

A) DHCPv6
B) ARP
C) ICMPv6
D) NDP (Neighbor Discovery Protocol)