Load Balance is enabled, RV042 will dispatch (using weighted Round Robin) incoming sessions to WAN1 and WAN2 according to the ratio of the WAN bandwidth. A session is defined by a TCP connection or a UDP stream with certain timeout.
as per users guide.
https://www.cisco.com/c/dam/en/us/td/docs/routers/csbr/rv0xx/administration/guide/rv0xx_AG_78-19576.pdf
* Dual WAN. There are two functions provided for users – Smart Link Backup and Load Balance..
* If Smart Link Backup is selected, you only need to choose which WAN port is the primary and then the other will be the backup.
* If Load Balance is selected, there will be two main choices:
• By Traffic – Intelligent Balancer (Auto) and user defined. See Figure 6-23. First, choose the Max. Bandwidth of Upstream (64K/128K/256K/384K/512K/1024K/1.5M/2M/2.5M or above) and Downstream (512K/1024K/1.5M/2M/2.5M or above) for WAN1 and WAN2, as provided by your ISP.
• Intelligent Balancer (Auto): When choosing Intelligent Balancer, it will automatically compute the maximum bandwidth of WAN1 and WAN2 by using Weighted Round Robin to balance the loading. If (upstream / downstream / upstream or downstream) bandwidth is excessive (30%, 40%, 50%, 60%, 70%, 80%, 90%), bring up the second link. When there is an inactivity time-out (None/10min/20min/30min/40min/50min/60min), the second link will be terminated.
Adding to this is the operation of Network Service Detection (NSD), which allows RV042 to ping the liveliness of the default gateway of the WAN port or a specified Host. The retry timeout and retry count will affect how long RV042 determines the WAN is down. By default the detection time is (Retry timeout) + (Retry count) * (5 sec) // the 5 sec is hard coded (which is about 1 minute)
