Beware of EMC switches sold as Mellanox SX6XXX on eBay

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Terry Wallace

PsyOps SysOp
Aug 13, 2018
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Try to force 56Gbe speed on the card and the switch and see if it is working.
With some DACs and optical transceivers auto-negotiation doesn't work at 56Gbe.
As far as I know all those mellanox cards are 56gig infiband and 40gig eth. I don't think you can get 56Gig eth out of one.
 

Freebsd1976

Active Member
Feb 23, 2018
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Labs

Member
Mar 21, 2019
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In one ESXi box I can only see 40Gbe max speed which I can select for a ConnectX-3. This is with ESXi default driver.
I don't have any 56Gbe DAC to see if it will change when connected to a 56Gbe capable switch.
 

Freebsd1976

Active Member
Feb 23, 2018
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help needed, got to second sx6012 start another conversion ,use tftp upload kernel and fdt success after many times try(speed very slow output like this ####T###T#T) , but when upload minios transfer speed very slow and finally fialed, use whole afternoon try hundreds times , still can not upload .
Try different tftp server under windows 2016 and linux , still no lucky , only clue is auto negotiations result when transfer some time show 1000m ,sometimes 10m and half duplex ,some time time out
Anyone can help me?
 
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Freebsd1976

Active Member
Feb 23, 2018
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probelem sloved change connect device (sx6012 and my pc) from netgear 6300v2 router to an dumb swtich , everything run smtooh
 
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mb300sd

Active Member
Aug 1, 2016
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So I got 56gb working with a ConnectX-3 using a DAC to the server. Anyone know what optics I can use to run to a different room though? Need a 75ft run.

I have
EMC 019-078-048 4x14G FDR FTL414QB2N-E5
and
Brocade 57-1000267-01 4x16G Xbr-000232
and they don't work.
 
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metag

Member
Apr 26, 2016
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It has been a while since I did my conversion. I am now in need of running eth mode but find my switch does not have VPI mode as several others posted here. For those of you have VPI enabled, how did you do it? I went back to the guide but could not find anything related. TIA!
 

Freebsd1976

Active Member
Feb 23, 2018
390
73
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It has been a while since I did my conversion. I am now in need of running eth mode but find my switch does not have VPI mode as several others posted here. For those of you have VPI enabled, how did you do it? I went back to the guide but could not find anything related. TIA!
change mode in WebUI and cli command , not in guide
 

metag

Member
Apr 26, 2016
64
16
8
Forgive me...first time working with eth mode: I cannot establish eth connection using the switch. The ports on the switch are set to eth mode; the host adapters (FreeNAS and a Windows server) are set to eth mode; Direct connection between the two hosts succeeded with the same cable. What am I missing?

attached is a screenshot of the port.
 

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Freebsd1976

Active Member
Feb 23, 2018
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according your picture , you still in vpi mode, you need read the manual change part 3 into eth mode use clip command, or change cable
 

metag

Member
Apr 26, 2016
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according your picture , you still in vpi mode, you need read the manual change part 3 into eth mode use clip command, or change cable
Sorry, I don't get it? I did change the port type of port 3 to ethernet mode, which the screenshot showed? And here is what I had for port type

Code:
Port Protocol Config
Port(s)      
Type      
 Apply

Port Type Info
     Protocol    Ports
     InfiniBand    1/1, 1/2, 1/4, 1/5, 1/6, 1/7, 1/8, 1/9, 1/11, 1/12
     Ethernet    1/3, 1/10
I also tried to switch the whole switch to eth profile, no dice either.

As for the cable, I used exactly the same one as the one I used to connect the two hosts successfully?

Thanks for the suggestion on the manual. I was doing that to try to troubleshoot. But I found not much I can do since the CLI is not working as the manual described. For example, the manual says you run "configure terminal" to get to the config mode, which I am getting a command not found error...
 

Emek

Member
May 14, 2017
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Do you have a DHCP server or configured static IP's.
If so can you ping the server?