Originally Posted by Ygrex
what is the issue?
1. the server ignores/declines arp replies
2. the server does not send any arp requests
3. the server send requests but replies do not reach it for some reason
4. the server responds to all arp requests but these are ignored by other devices
... you choice
none of the above. the server does not reply/respond to initial inbound arp requests.
if you ping or arping the ubuntu server from another device, the server never responds. a tcpdump shows no traffic from the server. the mac of the "pinging device" is not in the arp table.
however, if you manually add the mac of the other device to the ubuntu server's table, the ping from the other device will succeed. alternately, if you ping the other device from the ubuntu server first, the remote device's mac appears in the arp table and the remote ping will complete.
when the server is cold booted, the wireless interface comes up and authenticates (wpa2) on the AP. the ap can ping the server and vice-versa. other than that, the server is deaf to any other devices. i have about come to the conclusion the problem is with the ubuntu supplied ar9271 kernel module.