Anyone running a compact managed PoE switch that cleanly carries Dante and Art-Net on separate VLANs? My Netgear M4250-10G2F-PoE last night (32x32 Dante @96k on VLAN 10, Art-Net on VLAN 20, IGMP on) had brief PTP drops when the LED wall powered up, so did QoS or PTP tweaks solve it for you, or is there an 8–10 port unit you trust in a flypack?
Seen this on M4250s — the LED wall hits like a truck, so a tiny UPS for the switch/clock plus QoS that trusts DSCP and prioritizes PTP (DSCP 56) per Audinate usually stops the “PTP drops”: https://support.audinate.com/hc/en-us/articles/202011787-Quality-of-Service-QoS-Configuration. If you want a flypack unit, the Cisco CBS350-8P-2G has been rock solid for Dante/Art‑Net; small caveat: turn off EEE. Did you have a querier on each VLAN?
And disabling EEE/Green Ethernet on the M4250 stopped my brief ‘PTP’ drops when an LED wall booted — turn it off on all Dante (VLAN 10) ports and the uplink/trunk. If you’re still getting hits at 96k, set a Preferred Master in Dante Controller so the clock doesn’t shuffle during the power surge; have you tried that?
On the M4250, enabling “broadcast storm‑control” on the Art‑Net ports and weighting VLAN 20 to a lower queue kept my 32x32/96k Dante clock stable during power hits. If you want a smaller box, the Cisco 3560CX‑8PC has been solid for me with an IGMP querier on VLAN 10 and the same broadcast cap on lighting. Do you have a querier running, or just snooping on those VLANs?
@lwilliams I fixed the same drops by marking all audio device ports as RSTP edge/PortFast with BPDU guard and making the switch STP root, so a lighting uplink couldn’t trigger a reconvergence. If you’re bridging anything on a device port, skip edge on that one — does this line up with what you tried?
Seen that same ‘32x32 @96k’ hiccup — policing the lighting VLAN to about 10–20 Mbps on the uplink and mapping DSCP 56 (PTP) to strict priority stopped it for me. For an 8–10 port that behaves in a flypack, the Cisco CBS350‑8P‑2G’s been rock solid. Are you marking PTP on the Dante ports or relying on the preset?
I’ve had PTP blips vanish after disabling 802.3az (EEE) and Rx/Tx flow control on the lighting ports, plus setting QoS to trust DSCP so PTP stays in the top queue. @lwilliams did you try forcing your Art‑Net to unicast instead of broadcast when the wall wakes? The Cisco CBS350‑8P has been solid in a flypack with those tweaks and an IGMP querier, and Audinate’s EEE note backs this: https://www.audinate.com/faq/what-is-energy-efficient-ethernet-eee.