Run Multiple VLAN With Single DHCP Server

Hardware MikroTik hardware general
1

Hi,
I have RB5009 and HAP AC3, both device act as PPPoE and management for our ISP. Because we use existing device from several brand on our client, we need follow their default VID for their management. Currently we have 3 VID:
VID 98 : 10.11.98.1/24
VID 99 : 10.11.99.1/24
VID 100 : 10.11.100.1/24

All vlan run at default bridge and passed to OLT via eth5. I want keep it simple, run all vlan with single IP (10.11.99.1/24) and DHCP Server. So, i made a new bridge, put all those vlan to it. But, how can i pass those vlan to eth port? Since they are on different bridge.

Thanks

2

Why have you got 3 VLANs in the first place then if you just want to bridge them all together?
It is utterly pointless. Either that or you just don’t understand networking.
If you want one LAN, make one LAN.

3

If it’s only management, then you can bridge all 3 VLANs.

I’ll assume you have ether5 off-bridge and have something like this:

/interface/vlan
add interface=ether5 vlan-id=98 name=e5v98
add interface=ether5 vlan-id=99 name=e5v99
add interface=ether5 vlan-id=100 name=e5v100

You can bridge them by creating brdge and add those vlan interfaces to that bridge. Use bridge interface as binding interdace for router’s management address and DHCP server:

/interface/bridge
add name=bridge-management
/interface/bridge/port
add bridge=bridge-management interface=e5v98
add bridge=bridge-management interface=e5v99
add bridge=bridge-management interface=e5v100

IMO this is not worth bothering, it doesn’t bring much of benefit, specially do as these devices are from different vendors and require different management procedures and by merging managenent subnets you loose some flexibility (e.g. management IP address grouped by device vendor withpossibility to easily offer different DHCP options, etc.), you increase broadcast domain with well known drawbacks, etc.

4

First, sorry because i placed this post on wrong category.

Each device has different vlan, i can change default vlan for several devices, but when client reset their device, it will revert to their default VID. They have several default vid when got reset, like 46, 98, 99, 100, 1101, 1011. That’s why i have many vlan

I think this my best option. They come from different brand and model, but all can be managed via TR-069 and OMCI. I just need to identify them all as managed devices.