M4250 A&H DX port profile

Question

Netgear recently added a port profile for A&amp;H GigaAce which is great. But I'm wondering how best to connect DX signals. They require the ports being limited to 100mbps which the GigaAce profile won't be. Could this be a request for a new port profile?

jackjamesnkg86 · Answer

That’s a fair concern. The GigaAce port profile is a great addition, but DX links are a different requirement since they need the port speed fixed at 100 Mbps. Because of that, the current profile doesn’t really suit DX connections.

A separate DX-specific port profile with a locked 100 Mbps setting would make things much cleaner and avoid per-port manual adjustments. For now, manually configuring those ports seems like the only reliable option.

schumaku · Answer

Dont think so. The profiles define different QoS aspects. And a Fast Ethernet device won't do anything different, regardless if connecting to a GbE, MultiGig. 10GbE port. port operating on higher data rates (2.5 G and up) are mandatory using link speed negotiation anyways.

SwanJovi · Answer

The guidance from A&amp;H stipulates that the connection has to be set by the switch to be 100mpbs as their testing showed that it wasn't reliable when left to auto negotiate. I assume these switches have the ability to do that, but that's obviously not a setting available in the AV interface.&nbsp;

schumaku · Answer

What stops you from doing so?
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Netgear Engage does provide simple options (sorry, rarely touch the local AV Web UI...).
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schumaku · Answer

SwanJovi wrote:
The guidance from A&amp;H stipulates that the connection has to be set by the switch to be 100mpbs as their testing showed that it wasn't reliable when left to auto negotiate.

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Interesting. Considering the A&amp;H GigaAce is a Gigabit capable device (nomen est omen...). Have some references where this note is coming from exactly?&nbsp;
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In the A&amp;H Recommended Cables Guide they are mentioning for transporting audio between two nodes:
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"dSnake, ME, ACE and DX links use 100BaseT Fast Ethernet, with 99.7% of bandwidth use. gigaACE uses 1000BaseT Gigabit Ethernet, with 93% bandwidth use. S-link ports auto negotiate protocol and link speed, switching to dSnake, ME, DX or gigACE mode depending on the connected device."
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In my understanding, they are talking here of two adjacent nodes, directly connected. The negotiation applies to both the pure Ethernet PHY link as well as the effective transport over TCP or UDP. This is the "typical" definition from the earlier days of deploying AV networks. Can't get this myth away from the heads of some of my friends, that eg. Dante must be operated on a dedicated Fast Ethernet.&nbsp;
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Where one dos deploy multiple DX devices on a switch (for carrying more concurrent audio channels), this "advice" does not make much sense to me, especially where more and different audio channels are sent to the GigaAce interface(s).

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M4250 A&H DX port profile

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