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 From:  Lonnie Abelbeck <lists at lonnie dot abelbeck dot com>
 To:  m0n0wall List <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] net5501 VLAN creating MTU problems
 Date:  Wed, 29 Aug 2007 19:15:45 -0500
On Aug 29, 2007, at 6:53 PM, Chris Buechler wrote:

> On 8/29/07, Lonnie Abelbeck <lists at lonnie dot abelbeck dot com> wrote:
>> My goal today was to replace my Soekris net4801 with a shiny new
>> net5501.
>> I installed the generic-pc-1.231 on the net5501, replaced every "sis"
>> with "vr" to create my new config.xml .
>> vr0 - untagged LAN
>> vr1 - untagged WAN
>> vr2 - tagged VOIP, WLAN, OVPN, VLAN1 and XTRA
>> vr3 - empty
>> Long story short, it appears that "long frames" are not being used in
>> the "vr" driver with m0n0wall.  It appears I am having MTU issues,
>> ping's work everywhere, but large http's stall when tagged to
>> untagged interfaces are used, tagged to tagged work fine.  UDP
>> traffic is fine.
>> The Soekris net5501 uses the VIA Rhine III VT6105M nic.
>> o 802.1q Multiple VLAN support
>>    - VLAN long frames support (1518+4bytes)
>>    - VLAN tag auto inserting and extracting on TX and RX side
>>    - NIC auto filtering on VLAN ID optional
>> More detailed info:
>> http://www.via.com.tw/en/products/networking/rhine/vt6105m/
>> I tried m0n0wall 1.3b4, same MTU issues.
>> Any suggestions to enable long frames in the "vr" driver and solve
>> the MTU issues?
> Sounds like a driver bug.  phk fixed some issue in FreeBSD specific to
> the vr(4) driver and net5501's, which would not be in any m0n0wall or
> pfsense release yet, but I don't know what was fixed (somebody asked,
> he didn't reply). Seems there are also issues with Linux drivers from
> glancing over Soekris list posts since the 5501 came out.
> I would suggest posting to the Soekris tech list about VLAN long frame
> support not working with a recent FreeBSD RELENG_6_2 on the 5501, may
> get a response there. Could be a hardware or BIOS bug too, based on
> Soekris list posts there seem to be a number of those in the 5501. You
> may be the first person trying VLAN tagging on one.
> -Chris

Should an exec.php "ifconfig vr2 vlanhwtag" work with 1.3b4? 1.231  
does not support vlanhwtag.

Or is it far more complicated than that?