ARP is used to create a mapping between the IP address and the mac-address of a computer. The purpose of this mapping is so that the client computer cannot change the IP address at will, if the client changes the IP then in the end he cannot connect to the router even to the internet.
1. The first of all, Check the interface, with interface print command. We can see that ether2 is connected to the client laptop. I will make this router connected to the internet first, then create a dhcp server on ether2.
2. Configure the ip address with ip address add address=11.11.11.1/24 interface=ether2 command. Then do checking ip address print.
3. Next, do the dhcp server setup. type command ip dhcp-server setup.Then interface uses the internet connected to the client, is ether2
4. Check the DHCP server by typing ip dhcp-server print. We can see that we have successfully configured the dhcp server.
5. Before testing, make sure the ethernet desktop client was obtain
6. Go to details, we can see that we have managed to get an ip address,gateway, and dns-server. That means we success to configured.
7. Do a client test using ping. Open cmd then type ping 11.11.11.1. If the result was reply that means the client is connected to the router.
ARP Configuration
1. Enable ARP on the DHCP server with the command ip dhcp-server set numbers = 0 add-arp = yes . Then checks, and you can see that the ARP is active
2. Check it in the ARP list table with the command ip arp print
3. Change the ARP configuration on the ether2 interface with the command ethernet interface set ether2 arp=reply-only. Then check it and it can be seen that it succeed in changing the arp configuration to reply only.
4. Before doing test, change the ip on client to static.
5. Last, do testig in cmd, type command ping 11.11.11.1. We can that the result was request timeout that means router is not connect anymore.
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