Slow interface performance CRS326-24G-2S+

RouterOS General
1

Hi,

I have CRS326-24G-2S+ in small data center with a few physical server connected to it. On these servers (Proxmox) I have a couple of VM or LXC containers. I noticed some kind of bad network performance while doing NFS backup, on two servers only. So I installed iperf3 and made some tries on VMs, then directly on Proxmox hosts. The results are weird. Most servers (physical or VM) runs around 940 Mbits/sec, but I have two servers with around 459 Mbits/sec. I checked all settings in Proxmox (debian), I checked all settings on Mikrotik, but I could not found a problem. All interfaces seems have the same settings. The interesting thing is that when I runs iperf test on good servers it has no impact to CPU on Mikrotik, but when I run tests on “bad” servers Mikrotik CPU load raised.

So I suspected some kind of networking problems, but I could not find anything. Bad info is that I am unable to restart Mikrotik nor upgrade.
So I am trying to figure it out somehow without restarting.

I would appreciate any tips.

THX

2

It seems that HW offload is disabled for some reason on those certain ports. Execute /interface/bridge/port/print on terminal window and check if all ports have a ‘H’ in status column (between index number and interface name, without column header).

If you can not determine which setting does it, then post (full) config of switch for review.

3

It sounds promising, but not. All my active interfaces have HW-OFFLOAD.

I tried to disable those bad interfaces for 3 seconds and enabled them again and speed is now OK.

I am happy now.