Proxmox & VMs lose network connection with High Traffic

[pct86]

Hi everyone,
I'm having an issue with my home proxmox server. I'm hosting a Nextcloud docker container in an Ubuntu VM. For some reason it seems when there is high internet traffic both Proxmox & the VMs lose their network connection. I cannot ping the Proxmox server. VMs however are still running. Currently nextcloud is doing a 1st time sync to my backup client, and the backup size is 1.5tb, and I believe this high traffic is causing the crash. When the nextcloud docker container is shut down (ubuntu vm is still up though), I'm not getting any crashes.

Semi-noobie here. I appreciate any advice. Thanks!

 

[leesteken]

This looks similar (but also not solved yet): https://forum.proxmox.com/threads/lan-disconnects-after-heavy-network-traffic.145514/#post-656021

 

[pct86]

Thanks. I'll keep an eye on this thread as well.

 

[Lincee]

When i limit the bandwith to 15MB/s it seems to hold out longer, maybe you can check that as well?

 

[Kingneutron]

{Minion} Ehhh no, don't have the time or inclination for that ;-)

What I'm doing is sending/receiving ~2TiB of iperf3 test comms bidirectional with 2 parallel threads, between my Proxmox host and SuSE VM without involving a physical NIC; virtio, 10Gbit, MTU 9000 and doing a journalctl -f in GNU screen to keep an eye out for errors


time iperf3 -c hostip -k 2T -P 2 --bidir --repeating-payload

 

[Lincee]

{Minion} Ehhh no, don't have the time or inclination for that ;-)

My reply was not for you, in case you think that it was for pct86 ;-)

 

[Kingneutron]

No worries, I updated the other thread. My test ran for about an hour and a half IIRC and transferred somewhere between 3 and 15 terabytes of repeating data up/down with no issues. But that was just host-to-vm without involving a NIC

 

[Lincee]

@pct86 check this:
https://forum.proxmox.com/threads/r...eze-performance-with-promox-7-4-and-8.134212/