If you want to bridge two or more vlan at the same time.You can type these commands at the below.

Making bridge process
Code:
ifconfig eth0 up
vconfig add eth0 2
vconfig add eth0 4
brctl addbr br0
brctl addif br0 eth0.2
brctl addif br0 eth0.4
ifconfig eth0.2 0.0.0.0
ifconfig eth0.4 0.0.0.0
ifconfig br0 192.168.1.1
Take back confiiguration
Code:
ifconfig eth0.2 down
ifconfig eth0.4 down
ifconfig br0 down
brctl delif br0 eth0.2
brctl delif br0 eth0.4
vconfig rem eth0.2
vconfig rem eth0.4
brctl delbr br0
Debian based system script:
/etc/network/interfaces
Code:
Created Thursday 13 May 2010
# This network script was written by Kerim BASOL
# Purpose of script bridge two vlan network
auto br0
iface br0 inet dhcp
# For the static configuration undelete comments and comment above the line
#iface br0 inet static
#address 192.168.1.1
#netmask 255.255.255.0
#network 192.168.1.0
pre-up ifconfig eth0 up
pre-up vconfig add eth0 2
pre-up vconfig add eth0 4
pre-up brctl addbr br0
pre-up brctl addif br0 eth0.2
pre-up brctl addif br0 eth0.4
pre-up ifconfig eth0.2 0.0.0.0
pre-up ifconfig eth0.4 0.0.0.0
post-down ifconfig eth0.2 down
post-down ifconfig eth0.4 down
post-down ifconfig br0 down
post-down brctl delif br0 eth0.2
post-down brctl delif br0 eth0.4
post-down vconfig rem eth0.2
post-down vconfig rem eth0.4
post-down brctl delbr br0