Date:   Tue, 17 May 2022 16:23:16 +0200
From:   Sven Anders <sven.anders@...uras.de>
To:     netdev <netdev@...r.kernel.org>
Subject: Re: Bonding problem on Intel X710 hardware

Hello!

This is a follow up to my question. I did not hear anything so far, but I tried
to find some some information meanwhile.

I've got a guess from somebody, that the error message "Error I40E_AQ_RC_EINVAL
adding RX filters on PF, promiscuous mode forced on" maybe triggered, because
I'm hitting a limit here.

Somebody other said, that this seems to be an error in the "bonding driver", but
I do not think so. Aside from that, there seem to be no special "bonding" mailing
list anymore. So I will have to ask this questions here anyway...

I want to understand the problem to classify it.

1) Why is this "error" issued? Do I really hit a limit and what is this current limit?
2) Is it really an error or is it more "a warning"?
3) Why is this error triggered only when changing the "ntuples filter" and not during
    the normal adding of VLANs?
    Remark: I can trigger the "ntuples fiilter" later on again and it still works.

I also tried the latest 5.18-rc kernel with the same problem.

Maybe somebody will find time and try to reproduce this?
I will answer any questions...

Regards
  Sven

Am 12.05.22 um 16:05 schrieb Sven Anders:
> Hello!
> 
> I'm having problems setting up a bond in adaptive load balancing
> mode (balance-alb, mode 6) on an intel X710 network adapter using
> the i40e driver connected to an Aruba 2530-48G switch.
> The network card has 4 on board ports.
> I'm using 2 ports for the bond with 36 VLANs on it.
> 
> The setup is correct, because it works without problems, if
> I use the same setup with 1GBit Intel hardware (using the
> e1000e driver, version 3.2.6-k, firmware 5.10-2).
> 
> Data packets are only received sporadically. If I run the same test
> with only one slave port, it works without problems.
> 
> I debugged it down to the reception of the packets by the
> network hardware.
> 
> If I remove the number of VLANs under 8, almost all packets are
> received. The fewer VLANs the better the receive rate.
> 
> I suspected the hardware offloading operations to be the cause, so I
> tried to disable them. It resulted in the following:
> 
>   If I turn of the "ntuple-filters" with
>     ethtool -K eth3 ntuple off
>     ethtool -K eth3 ntuple off
>   it will work.
> 
>   But if I do this I see the following errors in "dmesg":
>    i40e 0000:65:00.1: Error I40E_AQ_RC_EINVAL adding RX filters on PF, promiscuous mode forced on
>    i40e 0000:65:00.2: Error I40E_AQ_RC_EINVAL adding RX filters on PF, promiscuous mode forced on
> 
> Disabling any any other offloading operations made no change.
> 
> For me it seems, that the hardware filter is dropping packets because they
> have the wrong values (mac-address ?).
> Turning the "ntuple-filters" off, forces the network adapter to accept
> all packets.
> 
> 
> My questions:
> 
> 1. Can anybody explain or confirm this?
> 
> 2. Is the a correct method to force the adapter in promiscous mode?
> 
> 3. Are the any special settings needed, if I use ALB bonding, which I missed?
> 
> 
> Some details:
> -------------
> 
> Linux kernel 5.15.35-core2 on x86_64.
> 
> 
> This is the hardware:
> ---------------------
> 4 port Ethernet controller:
>   Intel Corporation Ethernet Controller X710 for 10GBASE-T (rev 02)
>   8086:15ff (rev 02)
> 
> with
> 
>   driver: i40e
>   version: 5.15.35-core2
>   firmware-version: 8.60 0x8000bd80 1.3140.0
>   bus-info: 0000:65:00.2
>   supports-statistics: yes
>   supports-test: yes
>   supports-eeprom-access: yes
>   supports-register-dump: yes
>   supports-priv-flags: yes
> 
> 
> This is current bonding configuration:
> --------------------------------------
> Ethernet Channel Bonding Driver: v5.15.35-core2
> 
> Bonding Mode: adaptive load balancing
> Primary Slave: None
> Currently Active Slave: eth3
> MII Status: up
> MII Polling Interval (ms): 100
> Up Delay (ms): 200
> Down Delay (ms): 200
> Peer Notification Delay (ms): 0
> 
> Slave Interface: eth3
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Permanent HW addr: 68:05:ca:f8:9c:42
> Slave queue ID: 0
> 
> Slave Interface: eth4
> MII Status: up
> Speed: 1000 Mbps
> Duplex: full
> Link Failure Count: 0
> Permanent HW addr: 68:05:ca:f8:9c:41
> Slave queue ID: 0
> 
> 
> Regards
>   Sven Anders
> 


Mit freundlichen Grüßen
  Sven Anders

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