We are using Multicast extensively with Mikrotik and have a big issue with multicast traffic.

Have a problem with high concurrency multicast streaming, but don’t have a specific number of clients that starts to impact quality – or it's a problem with the volume of packets via each igmp group. For example if 70 people watch a football game (1.5mb stream rate) the quality is very poor during the “fast” action time, but quality improves when things are moving slowly, for example when interviewing people, even though the same number of viewers are watching the same stream? We want 100's of clients to want each channel.

Viewing multicast traffic (via mangle) we often have Rate > 100mbps & Packet Rate > 15,000p/s – is there any limits applicable to individual IP igmp streams – does Mikrotik have any “internal” settings, such as the PIM Interface limit of 32 that was set before RouterOS 4.6?

Hi all,

A brief update to say that we now believe this issue looks more and more as though it's related to a 32 user PIM limit, which was an earlier issue of RouterOS before 4.6. Any replys would be welcome.