freebsd stable - Apr 2003 - vlan0 on em0 has mtu 1496

Why does a vlan created against em0 have a mtu of 1496.

This is on 4.8-STABLE (cvsup'd this afternoon).

Dave.

-- 
===========================================================================|David
Gilbert, Velocet Communications.       | Two things can only be     |
|Mail:       dgilbert@velocet.net             |  equal if and only if they |
|http://daveg.ca                              |   are precisely opposite.  |
=========================================================GLO================

On Thu, Apr 17, 2003 at 08:13:55PM -0400, David Gilbert
wrote:
> Why does a vlan created against em0 have a mtu of 1496.
Because the vlan header takes up 4 bytes.  With em(4) devices it looks
like fixing that should be a simple matter of raising the real
interface's MTU to 1504.

-- Brooks

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