From owner-freebsd-questions@FreeBSD.ORG  Sun Apr 27 15:51:16 2008
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Date: Sun, 27 Apr 2008 17:51:05 +0200
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Subject: Re: VLAN Trunking with Freebsd
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Hey,

> I am sure this topic has been discussed before, however, I have been
> coming across unanswered inquiries within the last two months about
> possibly using the trunking aspect of 802.1q standard network routing,
> with only freebsd.  
> 
> I have attempted to create mulitple vlan interfaces and have failed, on
> 6.3-Stable.  
> 
> Does anyone know if the vlan emplimentation on Freebsd allows for
> trunking or, at the least, multiple vlans per physical device?

This is my config:

cloned_interfaces="vlan2 vlan3 vlan4 vlan5"
ifconfig_re0="inet 192.168.1.62 netmask 255.255.255.192"
ifconfig_re1="inet 192.168.1.254 netmask 255.255.255.128"
ifconfig_bge0="inet a.b.c.d netmask 255.255.255.240"
ifconfig_em0="up"
ifconfig_vlan2="192.168.41.1 vlan 2 vlandev em0"
ifconfig_vlan3="192.168.19.3 vlan 3 vlandev em0"
ifconfig_vlan4="192.168.42.1 vlan 4 vlandev em0"
ifconfig_vlan5="192.168.100.1 vlan 5 vlandev em0"

re0, re1, bge0 are ordinary interfaces (non-802.1q), and em0 is connected to a switch
with 802.1q support.

HTH,
Nejc