This is odd and it just recently started acting this way. No, I didn't have any configuration changes recently.
I have an EA6400 wireless router. Many devices are connected to it via Wireless (2 iPhones/2 iPads/3 Blu-Ray Players/1 Ubuntu laptop/1 Windows XP Laptop/1 Windows 8 desktop/1 Ubuntu Server/1 Epson Printer/1 Ubuntu Workstation). Now prior to last night I didn't have any problems, wife had been printing from Windows 8 to Epson all day. Sometime last night, she stopped being able to print to the Epson. I looked, sure enough, error printing.
Here's some more details:
All device are DHCP. EXCEPT for the following 3 static devices: Ubuntu Server, Epson Printer, Ubuntu Workstation
Tried pinging the Epson from Windows 8, no go. Tried pinging the router from Win8, no problem. Ping www.google.com from Win8, no problem. Ping Ubuntu server from Win8, no go. Ping Epson from Ubuntu server, no go. Ping Win8 from Ubuntu, no go. Ping iPad from Win8, no problem. Ping iPhone from Win8, no problem. Ping Ubuntu from WinXP laptop, no go. Ping Epson from WinXP laptop, no go. Ping from router to Win8, no problem. Ping from router to Ubuntu server, no problem, ping from router to Epson, no problem.
Wireshark of Win8 shows ping ARP request and reply for pings to iPad/iPhone.
Wireshark of Win8 shows ping ARP Who Has request for pings to Epson, but no responses back.
What the heck is going on? No Windows firewall issues, I turned off Windows firewall for testing and still had the problems.
Any ideas? The EA6400 has the Smart WiFi software which makes it difficult to troubleshoot things on the router itself.