Hello All,
I'm new to this forum and hope I'm not intruding.
I am not a networking guru and I do all I can to keep my network going and for the most part I do good.
I am trying to route multicast from a central location to two different external locations.
I have tried several methods of PPTp L2tp, PIM, IGMP, etc. I have been unsuccessful.
Quite frankly the information on Mikrotik Wiki is not really wrote for the non-IT guys. Some of the examples and instructions are lacking and don't make sense.
Anyway, as I said I have a Device that sends out multicast Packets that are received by three other devices that are located in remote sites, two of which are located in the same site.
What I cant figure out is how to setup a simple path between the multicast generator and the three receivers. I am told that a VPN is the way to go but I don't think that is the way to go due to overhead issues and complication. From what I gather there is a way to pass multicasting using Mikkrotiks but thus far i have unsuccessful.
I need help.

I would be glad to add any info if my explanation was too vague.
Thanks.

Hi, maybe this link can help you. I agree with you about Mikrotik multicast Wiki. I forgot, the link is http://forum.mikrotik.com/viewtopic.php?f=1&t=19359
Bye. If you success please tell me.

Look at this very simple example (ignore stp switchover part).
http://wiki.mikrotik.com/wiki/Manual:Mu ... Switchover

Hey All,
Thanks for the replies thus far.
Heres one deal I am running into: Where is ---routing-PIM?
I have been unable to locate it so far.
Using WINBOX under the ROUTING TAB I only see BFD, BGP, Filters,MME,OSPF,Prefix List, and RIP.
I am running the latest version of Firmware V6.0rc5 on my RB750gl.
Thought I read somewhere that PIM is not supported anymore on these routers.


Signed dazed and confused

You need to install multicast package.

As i banged my head a little on the walls how to set up such things, here are my conclusions...
After installing the multicast packet...
Assume I have a multicast source on ether2, and want to have access to the streams from eth1.
You can do this using WinBox.

1. Add the interfaces you need in routing/pim/interface. Both of them. In this case eth1 and eth2. Have pim and igmp enabled. I also set igmp version to igmp3, but igmp2 works.
2. Add a RP (in routing/pim/rp) on the OTHER interface (in my case the IP of ether1 - the streams come from ether2) for group 224.0.0.0/4
3. Add a forward rule (ip/firewall/filter rules for dest. 244.0.0.0/4 - from ether2 to ether1 in my case)

This should do it. Devices on ether1 can now join the mc groups from ether2 and get the multicast traffic.
Just an important issue: your clients must be able to correctly join multicast groups since the streaming is triggered on the "external" interface by joining the group...

Hello,

i'm having problems how to establish multicast routing over exiting wireless network. The situation is that we already using ospf routing and VLAN's for management, pppoe and unicast iptv. Now i want to established another vlan for multicast iptv but there my problem begin. If i send IPTV stream over vlan to next station and in same time i watch TV i'm getting multicast traffic on all interfaces in whole network where i got attached multicast vlan (but there i don't have any alive STB). The problem is that i need a solution which can stop multicast traffic in a given station/interface and start a new "session" of traffic in same station but on other interface. I guest i need a solution with PIM.

I'm attaching pictures of current network topology:
http://www4.slikomat.com/13/0515/gma-MT1.png
http://www4.slikomat.com/13/0515/tdm-MT5.png
http://www4.slikomat.com/13/0515/tsh-MT30.png
http://www4.slikomat.com/13/0515/b72-Skica.png

If i'm watching TV (look MT5 - port SFP5) i'm getting the same multicast traffic to MT30 (ether5 interface - VLAN20)

Any help would be welcome

wireless is very special when it comes to multicast. While client will work as usual the AP will send multicast packets on lowest data-rate. For HD streams the usual 6Mbps rate is too slow.