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Date: Thu, 12 Jul 2001 01:47:19 -0700 (PDT)
From: Adrian Pavlykevych <pam@polynet.lviv.ua>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/28908: fxp driver does not support child VLAN interfaces with MTU 1500
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>Number:         28908
>Category:       kern
>Synopsis:       fxp driver does not support child VLAN interfaces with MTU 1500
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jul 12 01:50:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Adrian Pavlykevych
>Release:        FreeBSD 4.3-Stable
>Organization:
Lviv Polytechnic National University
>Environment:
FreeBSD guard.polynet.lviv.ua 4.3-STABLE FreeBSD 4.3-STABLE #1: Thu Jul  5 16:19:06 EEST 2001     root@betelgeuse.polynet.lviv.ua:/stalker/obj/usr/src/sys/FIREWALL  i386
>Description:
fxp driver does not support 1500 MTU on its child VLAN interfaces
>How-To-Repeat:
ifconfig fxp0 up
ifconfig vlan0 inet 192.168.0.1 netmask 0xffffff00 vlan 1 vlandev fxp0

MTU in interface will be 1496, attempts to force 1500 MTU will result in network problems.

>Fix:
current fxp codebase claims to integrate Peter Lobo patch for VLAn support. Original code + patch worked properly handling longer Ethernet frames and MTU 1500 on vlan interfaces.

>Release-Note:
>Audit-Trail:
>Unformatted:

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