Date: Sun, 06 Dec 2015 04:42:21 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 205050] VLAN_MTU required by smsc driver Message-ID: <bug-205050-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205050 Bug ID: 205050 Summary: VLAN_MTU required by smsc driver Product: Base System Version: 11.0-CURRENT Hardware: arm OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: rpp@ci.com.au Created attachment 163881 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=163881&action=edit patch to sys/dev/usb/net/if_smsc.c When setting up VLANs on a Raspberry Pi ethernet port, the MTU drops from 1500 to 1496 bytes. The MTU should remain at 1500, extending the frame size as per IEEE 802.3. Adding IFCAP_VLAN_MTU to the if_capabilities field in the smsc driver solves the problem. The datasheet for the LAN9512 chip, section 3.2.3 states that the chip supports the extended frame. Trivial patch attached. -- You are receiving this mail because: You are the assignee for the bug.
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