"Accept join-request" and "Successfully processed join-request" but no "Forward join-accept message" with Multitech gateway

TTN Network and Services
1

Greetings,

I am trying to integrate a multitech MTCAP-L4E1 with TTN network. The link between the gateway and the network is fine and I can see all the uplinks going throught my gateway. But I face a lot of inconsistency in the transmission of downlink messages. It is very annoying to complete JOIN procedure. Sometimes everything works well, but most of the time the gateway seems to stop transmitting downlink communications.

In fact, I see that the network recognizes and accepts my device, but the join-accept message is never forwarded.

22:50:29
Successfully processed join-request
link
22:50:29
Accept join-request
arrow_upward
22:35:29
Successfully processed join-request
link
22:35:29
Accept join-request

I can add that I have some dragino LG308 and LPS8N that works normally and I only encounter the issue with my multitech gateways. Here is my multitech config.

LoRa Mode
PACKET FORWARDER

Frequency Band
868
Network
The Things Network
Channel Plan
EU868

Server Address
eu1.cloud.thethings.network
Upstream Port
1700
Downstream Port
1700

Forward CRC Disabled
Forward CRC Error
Forward CRC Valid

Antenna Gain (dBi)
3
Additional Channels 1 (MHz)
867,5

Disabled Duty-Cycle

Keep Alive Interval (s)
300
Stat Interval (s)
600
Push Timeout (ms)
100
Autoquit Threshold
60
2

Have you checked the log files on the gateway to see why it might refuse to send downlinks?

Also it seems you are forwarding packets with CRC errors, please don’t as it only wastes server resources. And to keep legal you need to have duty cycle enabled.

Your stats and keep alive intervals should be 30 seconds and 10 seconds. The current values can well be the cause of your issues.

3

Yes I had checked the gateway logs and it seemed like nothing was coming from the server to command a downlink.

I’ll correct the CRC setup.

Indeed putting back the stats and keepalive intervals to 30s and 10s fixes my issue, thank you. However the data consumption has become very huge (almost a GB in a few hours).

4

That can’t be right. I have gateways using the same packet forwarder using (including significant LoRaWAN traffic) about 10MB a day. (102MB in 14 days)

5

Do you know why??

6

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