Hi, i’m using an interface eth5 as trunk port for 2 vlans, vlan100 with id 100 and vlan200 with.. id 200 
Untag is done using switch chip vlan feature(eth1,eth2 and eth3 untag for vlan100 and eth4 untag for vlan200), how can i bind the dhcp client on untagged vlan100 for example since on vlan100 i have the dhcp server
Be sure that the vlan also goes to CPU as tagged, then add a VLAN interface to the switch master port, and put IP address and DHCP on the VLAN interface.
Thanks, i have tried this before without any luck
Here is what i have done using ether2 as the untag port for vlan100
/interface ethernet switch print
Flags: I - invalid
# NAME TYPE MIRROR-SOURCE MIRROR-TARGET SWI
0 switch1 Atheros-8327 none none
1 switch2 Atheros-8227 none none
/interface ethernet switch port print
Flags: I - invalid
# NAME SWITCH VLAN-MODE VLAN-HEADER DEFAULT-VLAN-ID
3 ether2 switch1 secure always-strip 100
4 ether4_PPPOE_TEST switch1 secure always-strip 200
5 ether5_TRUNK switch1 fallback leave-as-is auto
11 switch1-cpu switch1 fallback leave-as-is auto
12 switch2-cpu switch2 disabled leave-as-is 0
/interface ethernet switch vlan print
Flags: X - disabled, I - invalid
# SWITCH VLAN-ID PORTS
0 switch1 100 ether2
ether5_TRUNK
switch1-cpu
1 switch1 200 ether4_PPPOE_TEST
ether5_TRUNK
/interface vlan print
Flags: X - disabled, R - running, S - slave
# NAME MTU ARP VLAN-ID INTERFACE
3 vlan100 1500 enabled 100 ether2
/ip dhcp-client print
Flags: X - disabled, I - invalid
# INTERFACE USE-PEER-DNS ADD-DEFAULT-ROUTE STATUS ADDRESS
2 vlan100 no no searching...
Any ideas why this isn’t working? Thanks.