I have a wireless network connected to an Ethernet Interface of a 3660 router. The wireless network has about 300 devices (switches, AP's, Subscribers) and these devices are spread over multiple subnets. These different subnets are assigned using secondary interface IP's on the Ethernet interface.
My problem is that I keep losing connectivity to certain devices. It usually occurs only on 4-5 different access points on the network, though when I lose connectivity to these, I can still access subscribers beyond the AP. I have found out that I can restore connectivity by issuing a 'clear ip arp x.x.x.x'. At that point, I immediately start getting icmp requests back.
The network is completely flat (it's ugly), and I'm using a combination of vendors throughout the network. Most of the AP's and switches have STP turned on. Unfortunately I have about 0 experience with STP and properly configuring root bridges etc.
Can someone give me an idea how I can start troubleshooting this, or what may be causing it?