Names for the branch

NetLab lab Intermediate 4 tasks 20 points

The DNS server is NMS (10.1.1.50). Make names work everywhere:

R1's DHCP pool LAN already hands out addresses; make it hand out the DNS server 10.1.1.50 and the domain name example.com too. The PCs use DHCP.
R1 itself must resolve names through 10.1.1.50, with the domain name example.com.
Add a static host entry core for R2 (10.0.12.2) on R1.

How it works: this is VulnTech NetLab, a network simulator running in your browser. Click a device in the diagram to open its console and type commands, just like on real equipment (? shows help, Tab finishes a word). Click a cable to inspect it. Tasks tick themselves off as you complete them; questions are answered in the box under each task. Your work is kept if you reload; Reset starts the network over.

Solution explanation

The PCs only learn the new DNS server when they renew their lease. On R1, ip domain-lookup had been turned off, so without it the name server alone would have done nothing. With ip domain name, R1 tries www.example.com when you type www.

Show solution

[R1]
enable
configure terminal
ip dhcp pool LAN
dns-server 10.1.1.50
domain-name example.com
exit
ip domain-lookup
ip name-server 10.1.1.50
ip domain name example.com
ip host core 10.0.12.2
end
ping www
[PC1]
ipconfig /renew
nslookup www.example.com
curl http://www.example.com
[PC2]
sudo dhclient eth0
dig web.example.com +short