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Re: NVX Philosophical Network Config Pondering
¿ªÔÆÌåÓýThorsten, ? My impression/experience has always been that that actual multicast traffic flows to the querier ¨C and this Reddit thread matches my experiences: ?as does ??(¡°This means that every single multicast stream on the network needs to be forwarded to the querier. ¡ ¡°¡is configured as Querier, all the streams have to be forwarded to this switch, even if there are no subscribers. If each stream has a 1 Gbps bitrate, this means the uplink between the switches now needs minimum 3 Gbps capacity, even with only a single decoder¡±) -- although that has aways seemed like an odd behavioral choice. It is also frequently mooted by AV systems relegating AVoIP to a single isolated switch anyway (throwing away a lot of the power/versatility of AVoIP but I digress). ? My understanding is Netgear does some nonstandard things with IGMP on the M4xxx series to make multicast work a little more intelligently so perhaps the behavior mentioned is accurate within that implementation only? Although I¡¯m a bit of a Cisco snob I did seriously consider Netgear for the ¡°AV Closet¡± switch but on the used market the 48-port Cisco UPOE switch I wound up going with was 25x cheaper than any of the Netgear M4xxx I was finding (and I am, if nothing else, frugal) ? But all the more reason to have a ¡®lab¡¯ where I can break things without worrying about what a client needs or that I should be working on ¡°real¡± projects ? ? Enjoy (and good luck with) your conversion! -- Lincoln King-Cliby Commercial Market Director ?
? From: [email protected] <[email protected]>
On Behalf Of Thorsten K?hler
Sent: Thursday, May 22, 2025 3:23 AM To: [email protected] Subject: Re: [crestron] NVX Philosophical Network Config Pondering ? Funny coincidence ¨C I?m currently at the exact same point: replacing my the current DM-stuff in my house with NVX. The DMF-chassis with 6x350C arrived last week and is already up and running and I?ve collected a bunch of 350 and D30/E30 over time that are ready to go. I already have a fairly reasonable network in place all based on Netgear M4300 and M42500 switches, interconnected via 10G fiber. ? My setup won?t be as large as your?s. I?m looking only at 6x350C installed in the chassis that I plan to use as encoders and just about 3-4 projectors and displays for the decoders. All wired up nicely with CAT6 when we moved in 10 years ago. ? ? With regards to bandwidth: I?d plan the bandwidth requirements on actual use, not worst-case. At least for my own house. So which/how many streams are you actually about to use at the same time? How likely
is it that all your encoders and decoders will transmit/receive streams at the same time? ? With regards to the VLAN/querier question: querier data is just metadata and not the actual streams. So I would go ¡°by the book¡±. At least that?s what I?ll do. I?ve put all the NVX stuff on a dedicated VLAN with the querier remaining on the core. ? Cheers, Thorsten ? Von:
[email protected] <[email protected]>
Im Auftrag von Lincoln King-Cliby via groups.io ? There are about 7 decode (plus 1-3 encode, currently I have 3 DM-TXes around the house but only really use one with any kind of regularity and the other two are definitely in the ¡°they¡¯ll wait until I get my hands on more gear¡±) and the distribution of encoders and decoders is largely to get out of the (IMO) stupid cross patching I¡¯m currently doing to get DM to and from data drops in places where ¡°I¡¯ll never need AV CAT cable here¡¡± (from the time before DM was really a thing¡ but remind me never to say that about LV cabling next time I buy and wire a house¡) ? The switch choice aside from being in my ¡°reasonable enough¡± price range (it was about $80 shipped including both power supplies) was mostly driven by the desire to be able to do 10G over copper between the ¡°Data Core¡± and ?¡°AV Core¡± but also because I wanted to be able to power the non-¡°C¡±-series cards over PoE ¨C and the DM-NVX-350 are somewhat absurdly power hungry (requiring the 60-watt UPoE capability) ?(Aside from just not wanting to deal with wall warts, I manage power somewhat aggressively on the house when I¡¯m away so being able to turn off PoE to the switch port is a lot cleaner than scattering a bunch of relays or controlled outlets around. ? Since I have the cable between AV and data and the 10G ports are already there the fat pipe is essentially free. ? Looking forward to having some fun ¨C all the weird things I¡¯ve been curious about but would never do with a client¡¯s hardware or on a client¡¯s network¡. ? Lincoln ? From:
[email protected] <[email protected]>
On Behalf Of ckangis ? How many TV/Decoder end-points outside of your rack?? ? I'm definitely above my head on a lot of these streaming network details but: - If you have 24 encode/decoders or less, I would put them all on one switch. I think this would eliminate the need for a fat uplink. - Since you're using the DMF chassis' to power the encoders (and decoders for AVRs in rack, etc.), you wouldn't need POE for these, thus the POE requirements would be limited saving $$ on the switch you'd need for this - If you need more than 24 ports, going to a 48 port unit with limited/half-POE budget, could solve this also... ? Sorry if I'm missing details in your system design, and of course you probably already have thought of these things... Hope you can get things going great!! sounds fun!!! |