vlan0 on em0 has mtu 1496
Garrett Wollman
wollman at lcs.mit.edu
Thu Apr 17 17:50:35 PDT 2003
<<On Thu, 17 Apr 2003 17:19:04 -0700, Brooks Davis <brooks at one-eyed-alien.net> said:
> 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.
Actually, the parent interface's MTU should not be touched. The
link-layer header length is what needs to be increased.
-GAWollman
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