SF Connect: Not Available - Link Failure No Data Received

Product Discussion SpeedFusion Connect
1

I have a Balance One (v8.5.4), currently with three WANs connected via Ethernet:
• T-Mobile SIM in an original carrier device
• T-Mobile SIM in a BR1 Mini 5G (v8.5.4)
• AT&T hotspot

All indications are that all three links are robust: They always show green-connected in the Balance UI. The BR1 Mini 5G always shows green “Connected to T-Mobile 5G” with 5 bars signal strength. I can send non-SF Connect traffic on all three links simultaneously with good reliability and throughput.

BUT, one or more of the WANs often show “Not Available - Link Failure No Data Received” in the Balance’s SpeedFusion VPM - Remote Peer" status display. It’s usually the BR1 Mini 5G link, which is especially concerning. But sometimes it is one of the others, and occasionally two of the three links are shown as “Not Available - Link Failure No Data Received”.

I’ve searched this issue, but I don’t see clear indications of what the real problem is, or clear solutions. I have tried:
• changing outgoing ports for SF Connect
• reducing the number of SF Connect locations from three to two
• disabling, then re-enabling, the offending link
• rebooting the hotspot device of the offending link, and / or rebooting the Balance

None of those are guaranteed to fix the issue. As a result, usually the BR1 Mini 5G is NOT being used by SF Connect.

It seems to me that the link detection within SF Connect is prone to mis-diagnose, and very poor at recovery. It defeats the purpose of SF Connect if I can’t use the available WANs, especially when only one WAN is properly recognized as operational.

Any suggestions?

2

Hi…

When I saw this kind of message, about "not available - link failure "… I do a reset of the LTE modem and after get another ip address for the sim card on it… it is show conected at SF HUB and at SFC.

This kind of situation… I believe is some ISSUE between sim card provider and the internet bpg/ospf/route to final ip destination.

even, when the sim card get public ip address, this kind situation happened, few times.

3

Thank you. Worth a try, but does not help in my case. Resetting the cellular modem does result in a new IP address, but the device still isn’t recognized as good for SF Connect.

This issue is intermittent, but pretty persistent once it kicks in. Very odd though that of two SIMs from the same carrier have such different rates of this occurring. At least 80% of the time, it’s the BR1 Mini 5G that can’t be used by SF Connect. I invested quite a bit in that device and the Antenna Max. It works fine for normal traffic, but only occasionally works for SF Connect.