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Forum Discussion
M4200 -> M4300 Multicast Configuration (for NDI / Dante)
Hi all, I am not having any problems currently, but I wanted to run the config by this group and see if there's anything I'm missing or if any tweaks are in order... I have a M4200 with sever...
Also, I'm getting between 167-235ms in NDI video latency. Is it possible that the switch is adding some of this latency? I did change one NDI camera to unicast and it did not affect the video latency.
1. The document follows the Dante specification, and only MLD Snooping should be enabled. It's not
necessary to enable MLD Querier.
2. Correct that QoS would be a global setting for all ports, regardless of their respective VLAN
membership. In respect of Dante traffic, it's important to configure the respective IP DSCP queue
mapping, for example, IP DSCP 56 to Queue 6, etc.
3. The IGMP Snooping Querier status by default is enabled as "Querier Election Participate Mode". If you
access the CLI Console, this can be seen by issuing the following command from the "enable" prompt:
"show igmpsnooping querier detail". When there are two routers in the same subnet then only one of them
should send query messages. The election ensures only one router becomes the active querier, ie., the
router with the lowest IP address would be elected as the IGMP Querier for that subnet. The Wireshark
trace should also show the IGMP Query interval, which I believe would be 125 secs. The CLI console
command "show ip igmp interface vlan 1" would confirm this.
4. Not certain what may be the cause of the NDI video latency. I would recommend following the Dante
steps and also ensure the switch FW is updated to the latest version.
Please let us know the status.
Does Netgear (or Newtek) have recommendations as far as IGMP settings recommended for NDI multicast? Such as Query Interval, Max Response, and Expiration? What about Fast Leave?
I thought everything was working fine with about 6x NDI multicast sources between these two switches, and suddenly one source completely locked up and froze frame.
I am seeing a bunch of "Timer for Group Membership Interval has expired! Removing membership for VLAN 1 Mac" in the log files but not sure it was about that particular source.
Hi...
Please see the NDI Network Guidelines attached.
These suggest the following:
• Disable Quality of Service
• Disable Jumbo Frames
• Enable Flow Control
• mDNS/Bonjour must be accessible for auto discovery
• Configure for each switch in multi-switch networks when using multicastSet NDI connected switch ports to 1518, flow control on and untrusted QoS.
For Jumbo Frames and Flow Control settings, in the UI, navigate to:
"Switching => Ports => Frame Size".
The default is Jumbo Frames, so check the box next to the port number and change to "1518".
Enable "Flow Control" by again selecting the port number and select "Enable" in the "Flow Control" column.
This would also need to be carried out on the M4200 if NDI devices are connected.
Please also send the switch Tech Support file:
If the NDI devices are connected only to the M4300, do you still see the issue?
Thanks
Thanks. I've gone through the NDI Network Guidelines...
On Flow Control and changing frame size, should I change for all ports including the 10Gig trunk port connecting the two switches? QoS is configured for Dante, which is VLAN2, and I believe those settings apply to all VLANs?
Is setting the frame size to 1518 effectively disabling Jumbo Frames?
I will work to get switch configs posted when I can get into the site.
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