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How to disable arp on an alias interface?

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http://stackoverflow.com – I have created an alias interface lo:2. How do I disable arp on this interface so that it does not send out ARP replies? I have tried a bunch of method with no success: Method 1 echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce Method 2 Use -arp option with ifconfig Method 3: Add the following lines to /etc/sysctl.conf. net.ipv4.conf.all.hidden = 1 net.ipv4.conf.lo.hidden = 1 Please help. (HowTos)