I just bought a new Balance 20 from Amazon. I have it connected to cable on Wan 2/primary and DSL on Wan 1/failover.
Having cable/Wan 2 connected causes the Balance to max out the CPU after about 1 minute and then latency skyrockets and packets start dropping. If I disconnect cable/Wan 2 (using the Web Admin) then everything runs very smoothly on just DSL/Wan 1.
I have read other threads about setting Physical Interface Speed. I tried ‘1000Mbps Full Duplex’ and also ‘100Mbps Full Duplex’. Both settings produce same result as ‘Auto’, described above. I have also tried disabling Health Check Settings on both WANs to no avail.
When I connect a PC directly to the cable modem, there are no latency or packet loss issues and it runs at full speed. (Anyway, this is observed to be a Balance 20 CPU utilization issue.)
The Cable Modem is a Surfboard SB6190. The Balance 20 Firmware version is 6.3.0.
Any help would be appreciated.