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4 Posts

06-24-2019

CH

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  • Posts: 4
  • Registered: ‎06-24-2019
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X1 Yoga G3/G4 - Slow VPN performance over LTE/4G (Fibocom) / VPN Performance over WiFi 2x - 3x bette

2019-09-18, 14:37 PM

So apparently the Fibocom L850-GL has problems with VPN connections.

 

We are aware that reading/writing files onto mapped drives will be naturally slower on a VPN connection. But it's especially slow with LTE/4G on Fibocom L850-GL (this wasn't the case with Sierra Wireless module on X1 Yoga G2) but when connecting VPN over a WiFi it's two or even 3 times faster.

 

Any ideas?

 

Best regards,

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88 Posts

06-28-2018

US

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  • Posts: 88
  • Registered: ‎06-28-2018
  • Location: US
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Re: X1 Yoga G3/G4 - Slow VPN performance over LTE/4G (Fibocom) / VPN Performance over WiFi 2x - 3x b

2019-09-19, 6:45 AM

Sounds like an MTU issue to me. I've had VPN speed issues on different WWAN connections (due to packet sizing) because of smaller MTUs from WWAN links. Forcing a smaller MTU on the VPN resolved most of the speed issues that I've seen (both with Sierra and other manufacturers).

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