[asterisk-users] Rasterisk freeze on 4G link

[Duncan Turnbull]

> On 4/03/2016, at 5:31 AM, Olivier <oza.4h07 at gmail.com> wrote:
> 
> Hello,
> 
> I'm remotely managing an asterisk setup using an OpenVPN client on this Asterisk box, connecting to an OpenVPN server of mine).
> 
> This box is mainly connected to PSTN.
> It is also connected to the Internet, only for remote management.
> 
> The former ADSL link has recently been replaced by a new 4G link (UMTS).
> 
> I'm connecting to this box from a Debian Jessie/Gnome Terminal combo.
> 
> With this new link, whenever I launch a vim, a nano or a rasterisk session, my terminal freezes (rasterisk) or remains empty (nano, vim).
> 
> When a session is frozon, I can open a new one at the same so it excludes a basic connectivity loss.
> 
Usually incorrect MTU gives you this effect. Use ping with MTU size set to test and find what works.

You will probably also break it with any large text dump eg cat /var/log/syslog will also do it

> What would you suggest ?
> 
> Best regards
> 
> 
> PS: I was about to determine best MTU value but I always thought a punishment for a bad MTU value would be a lower throughput, not a screen freeze. Is it correct ?
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