4-WAN SpeedFusion faster as 2 pairs instead of 4 together?

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I’m doing some optimization to the outbound policies and so on at one of my sites. They are running a B1Core with a SF licence and an extra WAN licence. The other end of the SF tunnel is a FusionHub appliance. Through experimentation, we have discovered that the total downlink bandwidth available by bonding WAN1-2 and WAN3-4 separately through the “Multiple Tunnels” option is greater than bonding all 4 together. This is only observed when we use the built in load test for TCP packets, not UDP. I believe this likely has to do with the latency mismatch. 1-2 are more alike and 3-4 are more alike.

In the past, that remote site generally had all traffic routed via FusionHub over 4-WAN SpeedFusion. Is there a way to leverage our observation about the multiple tunnels without using outbound policy like this post describes? Something like a 1:1 (or 3:2 in my case actually) weighted balance between the two tunnels without having to pick a specific type of traffic?

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Hmmm :thinking::thinking::thinking:, This is more like fine tuning needed to be done for the SpeedFusion tunnel to get the most throughput base on the WAN characteristic. Please open a support ticket here support team to check.

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Dredging up an old topic here… With the release of FEC, user experience has seen a great speed improvement. I took this as an opportunity to test adding an LTE antenna into the mix with our B1Core router. What is strange is that 4-link ADSL without the LTE USB stick is faster than when I add it to the SF pool.

Is this normal behaviour?

Test data was an abnormally large database query routed over SF VPN.

[Album] imgur.com

Left is no LTE USB Modem. Right is with LTE USB Modem turned on.