Date: Sat, 2 Sep 2017 10:09:20 +1000 From: Graham Menhennitt <graham@menhennitt.com.au> To: freebsd-ipfw@freebsd.org Subject: Re: ipfw kernel NAT performance much worse in 11-Stable than 10-Stable [SOLVED] Message-ID: <0293e18b-d716-b259-6355-fcb59dfa11ab@menhennitt.com.au> In-Reply-To: <40f3bcab-5e0d-0905-ec95-8b4eec8cef89@yandex.ru> References: <ca7be746-ff34-b7d6-1cae-02246066c83d@menhennitt.com.au> <ee7cbcc1-bb7a-02cc-fb73-247441b5935b@yandex.ru> <87b38492-da4b-316f-37c2-e1043c2adee4@yandex.ru> <580bc972-7800-96ff-c190-0be176c22d77@menhennitt.com.au> <40f3bcab-5e0d-0905-ec95-8b4eec8cef89@yandex.ru>
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On 31/08/2017 22:27, Andrey V. Elsukov wrote:
> On 31.08.2017 15:10, Graham Menhennitt wrote:
>> On 10-Stable, the interface is re1. The output of 'ifconfig re1 | grep
>> options' is:
>> options=8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
>>
>> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>>
>> On 11-Stable (the one with the problems), it's igb1 and the output of
>> 'ifconfig igb1 | grep options' is:
>> options=6403bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
>>
>> nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>>
> You need to disable TSO on your interface, ipfw nat is not compatible
> with TCP segmentation offloading (this is noted in ipfw(8) BUGS section).
>
> Try to use:
> ifconfig igb1 -vlanhwtso -tso4
>
> You can add these option to "ifconfig_igb1" variable in rc.conf.
>
Thanks very much for that Andrey (and Ian). It fixes the performance
problem. I did look an the man page for both igb and ipfw but must have
missed this. I agree, Ian, it would be good if there was some kind of
warning at runtime.
So, that fixes the performance problems. I have another problem that
I'll send a separate email about.
Thanks again,
Graham
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