Re: Increase mtu? How?

Thomas Pries <[email protected]>
Newsgroups gmane.os.openbsd.misc
Message-ID <[email protected]>
Hi,

Am 05.06.26 um 00:09 schrieb David Gwynne:
> On Thu, Jun 04, 2026 at 10:52:10AM +0200, Thomas Pries wrote:
>> ...
>> ifconfig ix0/ix1?? hwfeatures ...??hardmtu 9198
>> ifconfig aggr0?? hwfeatures ...??hardmtu 9198
>> ...
> OpenBSD is different to most other systems in how it handles packet
> sizes and MTU on interfaces. ...

Thank you very much for this detailed explanation.

My network college would be happy, if I could would set the MTU to 9180 
and I tried to set this on aggr0 and ix* via:

ifconfig ix0 down

ifconfig ix0 mtu 9180

but I always get the error:

ifconfig: SIOCSIFMTU: Device busy

What is the procedure to set the MTU?


Kind regards

Thomas
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