OpenVSwitch - network GRE tunnel

dqq

Well-Known Member
Jan 30, 2020
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Hi,

I have set up GRE tunnel using OpenVSwitch as stated in this tutorial: https://documentation.online.net/en/dedicated-server/tutorials/network/rpn-proxmox-openvswitch

Nodes are communicating between each other using private network.

On first glance everything seems fine - VMs does see each other (are able to ping and exchange small documents).


The problem is that, when trying to send larger files and/or some performance tests (iperf/iperf3) the transfer seems to freeze (image attached).

What are the ways to fix it?
 

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It looks like it's hanging up on MTU - sending more than 1500 characters results in broken connection
 
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