Unicast to Multicast

RouterOS Beginner Basics
1

Hi all !

I have RB951Ui-2nD. I need to make forwarding unicast to multicast.

I’ve tried the next command:

/ip firewall nat add chain=dstnat dst-address=192.0.1.21 dst-port=14000 action=dst-nat protocol=udp to-address=239.0.2.1 to-port=14000

But it is not work.

Any ideas?

Thanks in advance.

2

I would add the IGMP proxy, defining the incoming interface as upstream, the outgoing interface(s) as downstream and then add the stream source as MFC manually.
-Chris

3

Chris thank you for your answer.

Сould you write more detailed instructions ?

I want to receive unicast on ether1 and translate multicast to ether2, ether3.

Thank you.

4

I’d give a try with this (taken from https://wiki.mikrotik.com/wiki/Manual:Routing/IGMP-Proxy#MFC_static_entry:

/routing igmp-proxy interface add comment="" disabled=no interface=ether1 threshold=1 upstream=yes
/routing igmp-proxy interface add comment="" disabled=no interface=ether2 threshold=1
/routing igmp-proxy interface add comment="" disabled=no interface=ether3 threshold=1
/routing igmp-proxy mfc add source=192.168.0.1 upstream-interface=ether1 \
downstream-interface=ether2 group=239.0.2.1 disabled=no

…where 192.168.0.1 is the IP address of the machine delivering the unicast stream, assuming it comes in to ether1.

-Chris

5

Thanks, Chris!

But should I have dstnat rule to change destination ip in this case?

Thanks.

6

From my understanding no, IGMP proxy should take care of this.
-Chris

7

Hmm… but in this case all traffic from ether1 will be translated to multicast.
I’ve tried with and without dstnat… not work yet :frowning: