Proxy arp works in 12.04?

[C. L. Martinez]

Hi all

 I am trying to setup some proxy arp entries in a Ubuntu 12.04 server,
but no go.

 My commands are:

 arp -i eth0 -Ds 172.25.50.30 eth0 pub
 sysctt -w net.ipv4.conf.eth0.proxy_arp=1

Any idea??

Thanks.