I have a NSA 240 and have a First Com and Comcast circuit. I have set X1 as the primary with first com and a static, I have set X8 as the secondary with Comcast and DHCP. My version of the OS is SonicOS Enhanced 184.108.40.206-65o. The Sonicwall is my network DHCP server. My two assigned DNS server are one from the first com provider and the second is the Comcast DNS servers. When LB/Failover is off, I have no problems. I would like to put this into Ratio mode to take advantage of the higher speeds available from the Comcast circuit. I have this exact configuration at another location working perfectly. I have no internal DNS servers or DHCP servers at this location.
When put into Ratio mode, I can no longer do a speed test outbound to one of the speedtest sites. I also cannot do tracert to a hostname; it just fails. I cannot ping to a host name; it will not resolve. If I change the LB/Failover to spillover mode and set the threshold at the 3000 limit of my First Com circuit, it works just fine. I'm not sure where to look further for reasons why this does not work. I have tested the Comcast circuit and it is working.