25.03.b.20250306.0140 - if_pppoe kernel module decreases performance on SG 6100
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@mfld I find this interesting as I admin a couple of 6100's. BUT I am testing at home with a whitebox (Dell R230) on a 940/940 pppoe WAN and I can fully saturate it. Same as with previous beta.
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@mfld said in 25.03.b.20250306.0140 - if_pppoe kernel module decreases performance on SG 6100:
Was saved by a */10 min /sbin/reboot cron I placed before playing with this.
Good job, and burned into my memory for remote :-)
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Only thing custom is that MTU is set 1492.
Only change made between speed testing was to toggle if_pppoe kernel module and reboot.
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@rpotter28 said in 25.03.b.20250306.0140 - if_pppoe kernel module decreases performance on SG 6100:
@mfld I find this interesting as I admin a couple of 6100's. BUT I am testing at home with a whitebox (Dell R230) on a 940/940 pppoe WAN and I can fully saturate it. Same as with previous beta.
I did not test on white label hardware as they are specced for achieving line speed on these 2Gbit pppoe links. The feature was of interest only on this 6100 as that's the only site that has hardware that cannot currently achieve line speed. The other sites that I have access to that use pppoe for fast fiber connections are i3, i7, i9 CPU that don't struggle. I could only compare system load there.
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@mfld said in 25.03.b.20250306.0140 - if_pppoe kernel module decreases performance on SG 6100:
Only thing custom is that MTU is set 1492.
I was insufficiently clear: I meant check what MTU ends up being negotiated. Confirm that it is the same for both mpd5 and if_pppoe.
The same applies to the question about compression and multilink.
Clearly there must be a difference between them to explain the lower throughput, and we would like to figure out why.
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@mfld said in 25.03.b.20250306.0140 - if_pppoe kernel module decreases performance on SG 6100:
The feature was of interest only on this 6100 as that's the only site that has hardware that cannot currently achieve line speed.
Understood. And yeah, I'm doing the 940/940 on the Dell with a Intel(R) Xeon(R) CPU E3-1280 v5.
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Vanilla pppoe:
COMPPROTO VJCOMP, 16 comp. channels, no comp-cidwith if_pppoe I am not yet able to see where it is logging to. It is not in /status_logs.php?logfile=ppp
Edit: I see
2025-03-28 01:31:19.912146+00:00 kernel - pppoe: received PADO but could not find request for it 2025-03-28 01:31:19.912127+00:00 kernel - pppoe0: host unique tag found, but it belongs to a connection in state 3 2025-03-28 01:31:19.912107+00:00 kernel - pppoe: received PADO but could not find request for it 2025-03-28 01:31:19.912087+00:00 kernel - pppoe0: host unique tag found, but it belongs to a connection in state 3 2025-03-28 01:31:19.912066+00:00 kernel - pppoe: received PADO but could not find request for it 2025-03-28 01:31:19.911973+00:00 kernel - pppoe0: host unique tag found, but it belongs to a connection in state 3 2025-03-28 01:31:13.007984+00:00 kernel - pppoe0: link state changed to UP -
OK I think I've replicated this locally. We are digging into it....
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Just to confirm, you are using ix0/ix1 for this connection?
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@stephenw10
Yes pppoe0 is bound to ix0
