Scale 10Gbe SMB share slow on pc fast on mac

[OliMathieu]

@afrosheen

it was a tough one,because nobody knew there was a loop.

Even me

@swc-phil

Well, actually it is not a loop

Okay, please tell me what it was?

@swc-phil

We can troubleshoot further if you want to. Are ip addresses on your truenas static or obtained via DHCP?

Thanks
The 2x25Gb Aggregated lik has a static IP and the 1Gb ip was given by the DHCP

[OliMathieu]

@afrosheen

What would cripple PC performance, but not the Mac, the way he had it setup before?

I thought it is the SMB multichannel … but I’m not so sure now

[swc-phil]

@OliMathieu

Okay, please tell me what it was?

I/we still don’t know. AFAIK, “loop” is usually referred to when 2 switches have multiple different paths to each other. Thus, causing a broadcast storm or something like that (I’m not a network guy). This is usually mitigated by STP but IMO should just be avoided.

@OliMathieu

The 2x25Gb Aggregated lik has a static IP and the 1Gb ip was given by the DHCP

I assume they have different IPs within the same subnet, correct? Having multiple NICs in one subnet could cause troubles but often works ok (don’t do it on purpose).
How did you access your SMB share? Was it by netbios name? Or maybe by <truenas-hostname>.local? If so, try to measure speed when accessing the share via aggregated 25G IP.

@OliMathieu

Aggregated lik

Sounds like some special technique with the forked tongue .

[OliMathieu]

@swc-phil

I assume they have different IPs within the same subnet, correct? Having multiple NICs in one subnet could cause troubles but often works ok (don’t do it on purpose).
How did you access your SMB share? Was it by netbios name? Or maybe by <truenas-hostname>.local? If so, try to measure speed when accessing the share via aggregated 25G IP.

Same subnet : Yes
I access to the truenas with the 2x25GBs aggregated NICs IP from PCs
I access to the Truenas with netbios name from Macs

@swc-phil

Sounds like some special technique with the forked tongue .

[swc-phil]

@OliMathieu

I access to the truenas with the 2x25GBs aggregated NICs IP from PCs

Ok, then I’m out of ideas. Perhaps more network-savvy users could solve this puzzle.