A technician has replaced the Internet gateway router, and now no users can reach the Internet. The technician can ping the router Ethernet port but not the ISP's router IP address. Which of the…

The correct answer is D. Outside interface shutdown. The technician can ping the internal (LAN-facing) Ethernet port, which confirms the router is powered on and the internal interface is functional. However, traffic cannot reach the ISP's router IP, meaning the WAN-facing (outside) interface is the problem. When a new router is…

Network troubleshooting

Question

A technician has replaced the Internet gateway router, and now no users can reach the Internet. The technician can ping the router Ethernet port but not the ISP's router IP address. Which of the following is the MOST likely problem?

Options

AFaulty crossover cable
BDNS server is down
CSwitching loop
DOutside interface shutdown

How the community answered

(24 responses)

A
4% (1)
B
8% (2)
C
4% (1)
D
83% (20)

Explanation

The technician can ping the internal (LAN-facing) Ethernet port, which confirms the router is powered on and the internal interface is functional. However, traffic cannot reach the ISP's router IP, meaning the WAN-facing (outside) interface is the problem. When a new router is installed, interfaces are often administratively shut down by default and must be explicitly enabled with a 'no shutdown' command. A faulty crossover cable (A) is unlikely since modern routers support auto-MDI/X. A DNS server issue (B) wouldn't affect ICMP pings to an IP address. A switching loop (C) would cause broader Layer 2 symptoms, not just WAN unreachability.

Topics

#gateway router#WAN interface#ISP connectivity#interface shutdown

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