NAD710 Lab 2 Answers

1. What is the effect of the first "ifconfig ethxx down" command on the system's ARP cache ?

Answer:

The arp table becomes empty after the first "ifconfig eth1 down"

[root@localhost ~]# arp -n
Address                  HWtype  HWaddress           Flags Mask    Iface
142.204.141.131          ether   00:0E:7F:3C:A8:F3   C             eth1
142.204.141.129          ether   00:0E:0C:4B:31:5C   C             eth1
[root@localhost ~]# ifconfig eth1 down
[root@localhost ~]# arp -n
[root@localhost ~]# ifconfig eth1 up
[root@localhost ~]# arp -n

2. What command disable ARP on a network interface?

Answer: To disable ARP on a network interface named 'ethxxx', one would use a command of the form 'ifconfing ethxxx -arp'.