[SOLVED] Proxmox limits network speed to 11Mb/S on 1000M ports

[AntonS]

Hi, i have some network speed limit problems on ProxmoxVE 8.1. Its connected by

Port​	Link Status​	Speed​	MDI/MDIX​	Flow Control​	Address Learning​
​	​	​	​	​	​
​	​	​	​	​	​
3​	1000M Full​	Auto​	Auto​	Disabled​	Enabled​

and speed of eno1 is also 1000M, but all VMs on it, or itself shell cannot reach even 100M?
where is limitations settings?


inter VM speed is good

root@promi:~# ethtool eno1
Settings for eno1:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: on
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        MDI-X: off (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

 

[cheiss]

and speed of eno1 is also 1000M, but all VMs on it, or itself shell cannot reach even 100M?

Are you sure the speed is not bottlenecked somewhere else on e.g. I/O? Since you are using (s)ftp to measure.

Could you run a proper iperf3 test? Might need to install it first.
iperf3 -s on one side to start an iperf server, iperf3 -c <serverip> on the other side.

 

[AntonS]

The same..... Dlink-DGS see 1000M, Poroxmox see 1000M - real speed is 94M

 

[cheiss]

That indeed is weird. So I guess the setup in essence is Proxmox VE node <-> Dlink switch <-> other machine?

What's the other machine? Have you verified the connection speed on the other machine, whether that is connected with 1Gbit/s as well?

 

[AntonS]

That indeed is weird. So I guess the setup in essence is Proxmox VE node <-> Dlink switch <-> other machine?

What's the other machine? Have you verified the connection speed on the other machine, whether that is connected with 1Gbit/s as well?

dlink dgs--1000M--pve(.0.118)
|
1000М
|
ubuntu (.4.15)

but real speed is 100M
ubuntu connected 1000M

also i have windows VMs on PVE, and there is 100M speed also

 

[AntonS]

found bottleneck

 

[_gabriel]

found bottleneck

thanks to report what you found...

 

[no-usernames-left]

found bottleneck

For the benefit of others, could you please post what the cause was and how you fixed it?