ipfw kernel NAT performance much worse in 11-Stable than 10-Stable

[Graham Menhennitt]

On 31/08/2017 20:03, Andrey V. Elsukov wrote:
> On 31.08.2017 13:01, Andrey V. Elsukov wrote:
>>> Does anybody please have any ideas on this, please? 
>> Can you show the output of `ifconfig igb1 | grep flags` on stable/10 
>> and stable/11? 
> Sorry, I wanted to write `ifconfig igb1 | grep options`.

Thanks for replying Andrey.

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>

Thanks again for your help,
     Graham