Modify Intel X540-T2 NIC To Work At 2.5GbE ?
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I did that a while ago, should have reiterated that going from PC direct to ISP Router gives the full expected speeds.
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@panzerscope
Hmm... Ok
Just to make sure it's not some hardware-specific glitch, I'd probably try installing IPFire or OpenWRT for x86 instead of pfSense—if you have enough time for such experiments, of course. The main thing is, don't forget to back up your configuration. -
If you set the advertised speeds for auto-neg to only one speed in the sysctls does it still flap?
[25.03-BETA][root@m470-3.stevew.lan]/root: sysctl -d dev.ix.0.advertise_speed dev.ix.0.advertise_speed: Control advertised link speed using these flags: 0x1 - advertise 100M 0x2 - advertise 1G 0x4 - advertise 10G 0x8 - advertise 10M 0x10 - advertise 2.5G 0x20 - advertise 5G 100M and 10M are only supported on certain adapters. -
@w0w said in Modify Intel X540-T2 NIC To Work At 2.5GbE ?:
@panzerscope
Hmm... Ok
Just to make sure it's not some hardware-specific glitch, I'd probably try installing IPFire or OpenWRT for x86 instead of pfSense—if you have enough time for such experiments, of course. The main thing is, don't forget to back up your configuration.I see the logic of doing that, for sure. However I am not willing right now to go that deep with it.
@stephenw10 said in Modify Intel X540-T2 NIC To Work At 2.5GbE ?:
If you set the advertised speeds for auto-neg to only one speed in the sysctls does it still flap?
[25.03-BETA][root@m470-3.stevew.lan]/root: sysctl -d dev.ix.0.advertise_speed dev.ix.0.advertise_speed: Control advertised link speed using these flags: 0x1 - advertise 100M 0x2 - advertise 1G 0x4 - advertise 10G 0x8 - advertise 10M 0x10 - advertise 2.5G 0x20 - advertise 5G 100M and 10M are only supported on certain adapters.If I set a link speed then it will be fine. Auto-Neg is a no go for me otherwise the WAN will go up and down all over the place. So I set it to 10G.
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So it still flaps even if you expose only one possible negotiation speed?
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@stephenw10 said in Modify Intel X540-T2 NIC To Work At 2.5GbE ?:
So it still flaps even if you expose only one possible negotiation speed?
What would the tuneable be for 10g only? Sorry I looked at what you put but don't fully understand the value/flag I need to input for sysctl -d dev.ix.0.advertise_speed
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It would be like:
[25.03-BETA][root@m470-3.stevew.lan]/root: sysctl dev.ix.2.advertise_speed=4 dev.ix.2.advertise_speed: 6 -> 4But obviously ix0 or whichever NIC you're using there
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@stephenw10 said in Modify Intel X540-T2 NIC To Work At 2.5GbE ?:
It would be like:
[25.03-BETA][root@m470-3.stevew.lan]/root: sysctl dev.ix.2.advertise_speed=4 dev.ix.2.advertise_speed: 6 -> 4But obviously ix0 or whichever NIC you're using there
Thanks. I have popped that in. Does that mean I should set my WAN to Autoselect now or leave it set at 10G? I had it manually set to 10G anyway, so seemingly nothing has changed.
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Yes, when you set it to autoselect it will try to negotiate a link with the other side but will advertise only 10G so it can't try to connect at any other speed.
It may still flap since it still runs negotiation. But many newer NICs/drivers actually require that to work correctly.
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@stephenw10 said in Modify Intel X540-T2 NIC To Work At 2.5GbE ?:
Yes, when you set it to autoselect it will try to negotiate a link with the other side but will advertise only 10G so it can't try to connect at any other speed.
It may still flap since it still runs negotiation. But many newer NICs/drivers actually require that to work correctly.
Thanks. I gave that a go, had to reboot for it work but autoselect now works :) However does not seem to be as reliable as just setting WAN to 10g manually. If I save a setting that causes WAN to restart, it will flop about again. I was not getting that when manually forcing 10g.
I will go back to manually setting it. Manually setting the link speed persisted through reboots anyway.
