I have a Windows Server 2003 R2 with SP2
Virtual Machine connected to a Cisco 2960 GiG switch. It trunks to a Cisco 3560G switch with a connection
to a Cisco 2950 switch. The 3560G has multiple SVI's configured. The 2950
connects to subscribers and network devices for a wireless network. The
wireless network is a flat network composed
of private addresses (for network equipment management) and public addresses
(subscriber routers). The Windows
Server has PRTG installed.
The problem is the Windows box sometimes cannot
PING a device on the wireless network. With another computer connected to the same switch, as the
Windows Server, it can PING the device. Once the second computer gets replies, the Windows Server starts
getting replies. After a few minutes of continuous PINGs, the Server stops getting replies but the other computer
gets them. Then, they switch. The Server gets replies and the 2nd computer times out.
I cleared the ARP table on the Server and
everything works for a few minutes on both the Server and 2nd computer. After a few minutes, the
PINGs timeout on one or both boxes.