em driver + VLAN's

[Dave Raven]

Thanks for the reply - I went down to the office to do exactly what you are
suggesting and it worked fine - removed "em_enable_vlans(adapter);"

Thanks all
Dave

-----Original Message-----
From: Doug Ambrisko [mailto:ambrisko at ambrisko.com] 
Sent: 18 January 2006 10:04 PM
To: Dave Raven
Cc: 'Gleb Smirnoff'; freebsd-net at freebsd.org
Subject: Re: em driver + VLAN's

Dave Raven writes:
| FreeBSD 4.9 - char em_driver_version[] = "1.7.16";
| 
| I've tried multiple bridge configurations - from bridging just em0,em1 
| to bridging two vlan's attached to each card. Unfortunately I don't 
| have access to the box at the moment - if its still necessary I will 
| fetch the information tomorrow (ifconfig etc)
| 
| To sum up its something like the following
| 	net.inet.ether.bridge_config=em0,em1
| 	net.inet.ether.bridge=1
| 
| Or vlan0,vlan1 with:
| 	ifconfig vlan0 create
| 	ifconfig vlan1 create
| 	ifconfig vlan0 vlan 100 vlandev em0
| 	ifconfig vlan1 vlan 100 vlandev em1
| 
| 
| If I change to using fxp it immediately works..

I think you will find you are bridging in promiscous mode and the HW VLAN
stuff isn't there.  You should try to bridge the vlan devices or disable the
VLAN HW (driver hack).  It works with the fxp0 since you are using SW VLAN
so the HW part isn't grabing it.  I've done the driver hack for some things
I needed to do.

Doug A.