Re: Network Kernel Extension vs Thunderbolt 3?
Re: Network Kernel Extension vs Thunderbolt 3?
- Subject: Re: Network Kernel Extension vs Thunderbolt 3?
- From: Vincent Lubet <email@hidden>
- Date: Wed, 20 Mar 2019 10:23:06 -0700
When installing an interface filter disables TSO (TCP Segmentation Offload) for
the interface and this lead TCP to clamp the MSS from 64K to 1500.
This is done because some interface filters do not process correctly packets
larger than the interface MTU
Vincent
> On Mar 20, 2019, at 9:24 AM, Stéphane Sudre <email@hidden> wrote:
>
> Just out of curiosity, is there any known issue in macOS 10.14.x where the
> simple presence of a network kernel extension significantly slows down
> network transfers through Thunderbolt 3 connectors but not through classic
> Ethernet connectors?
>
> For instance by automatically reducing the MTU size if a network kernel
> extension is enabled.
>
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