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Recap - The Silent Router

Lesson 26 of 35 in Coddy's LAN Labs course.

Challenge

Medium

Everything on the hosts is correct, yet pc1 cannot reach pc3. Ping to see the reason, show the router's routing table to confirm it, give r1's eth1 the address 10.0.0.1/24, and ping again.

Expected output:

pc1 -> pc3: unreachable (router r1 has no route to 10.0.0.20)
DESTINATION     VIA        IFACE
192.168.1.0/24  connected  eth0
r1 eth1: 10.0.0.1/24 (mask 255.255.255.0, network 10.0.0.0/24)
pc1 -> pc3: reply from 10.0.0.20 (ttl=63, via r1)

Try it yourself

Terminal

All lessons in LAN Labs

1Meet the Lab

Your First Lab Cables Wires Are Not Enough Recap - Build a Lab

4Routers and Gateways

Two Networks The Default Gateway Both Sides Need a Way Back Routing Tables Recap - Connect the Floors

7Growing the Office

The Plan Sales Comes Online Engineering Joins Gateways Everywhere Recap - The Printer

2Addresses on the LAN

Giving a Host an Address The First Ping What ARP Learned The Switch Learns Too Recap - First Conversation

5Troubleshooting I

The Unplugged Host The Missing Gateway The Typo in the Mask Recap - Two Faults

8Capstone - Fix the Branch

Survey the Damage Fix the Address Clash Masks and Gateways Recap - Prove It Works

3Masks Matter

Wrong Mask, No Reply Same Switch, Other Subnet Let check Do the Looking Recap - Diagnose the Pair

6Troubleshooting II

Two Devices, One Address The Network Address Trap Gateway on the Wrong SubnetRecap - The Silent Router

Practice on your own: Terminal playground