How do you verify if a Cisco router has a route to a specific subnet? Learn how the “show ip route” command displays the routing table and helps diagnose missing or incorrect routes—essential for Cisco Certified Field Technician (CCT) exam success.
Table of Contents
Question
A router is not forwarding traffic to a specific subnet. What command should be used to verify the route?
A. show running-config
B. show ip route
C. show vlan brief
D. show interfaces trunk
E. show spanning-tree
Answer
B. show ip route
Explanation
This command displays the routing table, helping diagnose missing or incorrect routes.
The command to verify if a router has a route to a specific subnet is show ip route.
The show ip route command displays the router’s entire routing table, including directly connected networks, static routes, and routes learned via dynamic routing protocols.
It provides information about the destination networks, next-hop IP addresses, outgoing interfaces, route source, administrative distance, and metric.
By examining the routing table, a technician can determine whether a route to the specific subnet exists, how the router plans to forward packets to that subnet, or if the route is missing or incorrect.
The command can also be filtered for a specific subnet or protocol, for example:
show ip route 192.168.10.0
to check for routes to the 192.168.10.0 network.
This command is fundamental for troubleshooting routing issues and verifying network reachability.
show ip route provides a detailed view of all known routes on the router, enabling the technician to verify if the router has a valid route to the specific subnet and to diagnose routing problems.
Cisco Certified Field Technician (CCT) certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Cisco Certified Field Technician (CCT) exam and earn Cisco Certified Field Technician (CCT) certification.