Hello,
We are implementing a network for AV applications, like Dante audio over IP, NDI and lighting control.
Last year, we implemented the core part and 3 access switches and this year we added quite a bunch of access switches.
Before this year's extension, we had IGMP snooping enabled on the whole network and things worked fine - all multicast traffic was flowing as expected.
The following multicast groups are used for all devices to work properly:
Group address | Port | Usage |
239.255.0.0/16 | 4321 | ATP Multicast Audio |
239.69.0.0/16 | 5004 | AES67 Multicast Audio (RTP / AVP port) |
223.0.0.233 | 8700-8706 | Dante Control |
224.0.1.129-132 | 319, 320 | PTP |
224.0.0.251 | 5353 | mDNS |
224.0.0.230 – 233 | 8700 – 8708 | Multicast Control and Monitoring |
239.16x.x.x | ACN Yamaha | |
239.192.x.x-239.195.x.x | SDT session, dyn. Based on IP and MAC Shure | |
239.254.1.1 | 9998 | Logging |
239.254.3.3 | 9998 | PTP Logging (if enabled) |
239.254.44.44 | 9998 | Logging |
239.255.254.253 | 8427 | Multicast SLP Shure/Yamaha |
239.255.255.250 | 1900 | SSDP, service discovery Shure |
239.255.255.253 | SLP multicast address Shure | |
239.255.255.255 | 9875 | SAP (AES67 discovery) |
After adding the access switches this year, we have a problems with multicast traffic reaching them from other switches. Only on the NEW switches. They are all connected over a trunk LAGG to the core switches with the same admin VLAN and allow all VLANs.
So we had to limit IGMP snooping to the core switches to re-gain normal functionality. This is a problem for access points and 100Mbps devices, we can't leave the network in this situation.
Does someone know what can be a problem for multicast traffic on Meraki switches? All switches are MS425-32, MS125-24/48.
And how on earth this problem happens only on new switches?? Is there a hardware change?
Thanks,
Daniel
And there are differences, the ms120-8p models we got a couple of months ago differ from the ones we received a year or so ago as the new ones experienced the PoE mis-location issue, but the old did not...
No, 24 and 48 ports models.
IGMP snooping querier is enabled on each VLAN where needed.
@dloeliger Sorry to revive this topic, but I'm having problems very similar to the MS120, the igmp traffic apparently doesn't flow in the LAGG between the switches, were you able to resolve this somehow?
I'm also using this for Dante, I don't know if it was a good idea lol
@ofelipe So we we found one problem, we had to unstack the core switches to have multicast work fine with igmp snooping enabled. Maybe even brake lagg also (but no more abolutely sûre about this point).