vmx(4) ignoring MTU changes

To: tech-net%netbsd.org@localhost
Subject: vmx(4) ignoring MTU changes
From: Dustin Marquess <dmarquess%gmail.com@localhost>
Date: Fri, 4 Jan 2019 03:24:08 -0600

Just wanted to see if this was known or not before I filed a pr, as I
didn't see any mention of it in the man page.  This is on the latest
HEAD build.

Was trying to see if vmx(4) supported jumbo pages when I noticed that
it seems to completely ignore all MTU changes at all:

localhost# ifconfig vmx0 | head -1
vmx0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
localhost# ifconfig vmx0 mtu 9000
localhost# ifconfig vmx0 | head -1
vmx0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
localhost# ifconfig vmx0 mtu 576
localhost# ifconfig vmx0 | head -1
vmx0: flags=0x8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500

Thanks!
-Dustin

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- Re: vmx(4) ignoring MTU changes
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