The Aruba switch you are using is enterprise grade with 48 ports - expensive for a home setup. What are the feature I would need to look for in a switch in order to be able to do what you demonstrated in this video?
What effect does enabling QoS tagging on the video have when not enabling multicast to unicast on the wireless controller? Does the QoS tag affect the OTA WiFi rate of the data?
The QoS tagging is put on at the ingress port on the switch. Even if there is then no Wi-Fi at all, the traffic is still marked as video for the wired LAN. As for Wi-Fi, the QoS tagging doesn't have anything to do with the data rate in the air. The big difference there is between multicast rates and unicast.
What are you using for Multi-cast and Uni-cast on the computer? Is the software available for Windows 7? Also, is that Wireshark running at the top of the screen?
That wasn't a netgear, just an equally dumb switch. All switches will pass multicast traffic, but only a properly set up one that can do IGMP will be able to stop flooding it (and crippling your network). That was my whole point of demonstrating the difference between the two switches.
The multicast to unicast feature in the switch, is it just called "multicast to unicast" or can it have different names as well? I have ordered a Linksys LGS308 8-Port (I haven't received it yet) If possible i will configure that feature on my switch as it will be used with my Raspberry streaming server. The switch supports IGMP snooping.
The multicast to unicast in this example is the wireless side of things. It makes it so it goes at unicast rates through the air. It is still multicast on the switch. You may want to look at this instead if your equipment doesn't have the capability to convert it on the wireless side ua-cam.com/video/5LES9V6YEMI/v-deo.html
Would there be any point to using the Multicast to Unicast translation in the scenario where rather than have one host you have 100 receiving the same channel. Would this now flood the network with 100 different sessions rather than 1 session to all 100?
Are you talking about the wireless convertion of multicast to unicast? You are correct. It would send 100 individual unicast streams. But, it's doing them at unicast rate. Let's think it through. It is unlikely that you will have (a) 100 clients on the same AP, and (b) all wanting the same multicast group. Also, if a multicast rate is something like 4Mb/s for example (about the bandwidth of an SD channel), then multiply that by 100 = 400Mb/s. That's not unthinkable with today's Wi-Fi standards, although there will be more collisions and retries and general overhead. Another thing I didn't mention in the video but should have is, if you look at the video at 3:46, that mess on the screen is actually because multicast frames don't get acknowleged. Unicast frames do. So if it's going out as multicast, then if there are collisions then you'll notice it. If there are collisions in unicast, the frame will be retried. That's really actually why it got cleaner when I went to unicast. I talk about this from an enterprise grade equipment point of view. As I said, you really wouldn't get in a situation with 100 clients on one AP all watching the same tv channel multicast group. But you'd actually be surprised what you can get out of a good quality AP. Also, there is a threshold setting where you can say if there are more than 'x' amount of users on a multicast group, then leave it as multicast ;)
Awesome video. Thanks. but what are you typing off camera to: 1. enable the (inaudible) Snooping to stop flooding to the first laptop? 2. configure multicast to unicast to the laptop?
![The moment we stopped understanding AI [AlexNet]](http://i.ytimg.com/vi/UZDiGooFs54/mqdefault.jpg)
Love the detailed explanations. Keep it up.
The Aruba switch you are using is enterprise grade with 48 ports - expensive for a home setup. What are the feature I would need to look for in a switch in order to be able to do what you demonstrated in this video?
One that can do IGMP snooping so multicast isn't flooded to all ports
I own one and it's never let me down- Check out the $20 TP-Link 5-Port Gigabit Ethernet Desktop Switch TL-SG105 v4
What effect does enabling QoS tagging on the video have when not enabling multicast to unicast on the wireless controller? Does the QoS tag affect the OTA WiFi rate of the data?
The QoS tagging is put on at the ingress port on the switch. Even if there is then no Wi-Fi at all, the traffic is still marked as video for the wired LAN.
As for Wi-Fi, the QoS tagging doesn't have anything to do with the data rate in the air. The big difference there is between multicast rates and unicast.
What are you using for Multi-cast and Uni-cast on the computer?
Is the software available for Windows 7?
Also, is that Wireshark running at the top of the screen?
VLC is being used to view the stream and yes, that is wireshark.
VLC, can't beat it!
I would ask a question, is it possible to swap from normal Tv tuner(DVB-T) to DVB-S,
does the Netgear switch u used in the vid at start support multicast?
That wasn't a netgear, just an equally dumb switch.
All switches will pass multicast traffic, but only a properly set up one that can do IGMP will be able to stop flooding it (and crippling your network). That was my whole point of demonstrating the difference between the two switches.
how many channels can be transmitted per unit?
The multicast to unicast feature in the switch, is it just called "multicast to unicast" or can it have different names as well? I have ordered a Linksys LGS308 8-Port (I haven't received it yet) If possible i will configure that feature on my switch as it will be used with my Raspberry streaming server. The switch supports IGMP snooping.
The multicast to unicast in this example is the wireless side of things. It makes it so it goes at unicast rates through the air. It is still multicast on the switch.
You may want to look at this
instead if your equipment doesn't have the capability to convert it on the wireless side ua-cam.com/video/5LES9V6YEMI/v-deo.html
@@TallPaulTech Ah, I missed the part when you said that you are going wireless. My access point is a Cisco Aironet 1231G.
@@TallPaulTech What model of wlan-access point do you use?
Would there be any point to using the Multicast to Unicast translation in the scenario where rather than have one host you have 100 receiving the same channel. Would this now flood the network with 100 different sessions rather than 1 session to all 100?
Are you talking about the wireless convertion of multicast to unicast? You are correct. It would send 100 individual unicast streams.
But, it's doing them at unicast rate.
Let's think it through. It is unlikely that you will have (a) 100 clients on the same AP, and (b) all wanting the same multicast group.
Also, if a multicast rate is something like 4Mb/s for example (about the bandwidth of an SD channel), then multiply that by 100 = 400Mb/s. That's not unthinkable with today's Wi-Fi standards, although there will be more collisions and retries and general overhead.
Another thing I didn't mention in the video but should have is, if you look at the video at 3:46, that mess on the screen is actually because multicast frames don't get acknowleged. Unicast frames do. So if it's going out as multicast, then if there are collisions then you'll notice it. If there are collisions in unicast, the frame will be retried. That's really actually why it got cleaner when I went to unicast.
I talk about this from an enterprise grade equipment point of view. As I said, you really wouldn't get in a situation with 100 clients on one AP all watching the same tv channel multicast group. But you'd actually be surprised what you can get out of a good quality AP.
Also, there is a threshold setting where you can say if there are more than 'x' amount of users on a multicast group, then leave it as multicast ;)
What is the make / model of the switch ?
In this video it is an Aruba S2500
I would pay for online courses hosted by you.
Haha... what type of info would you like?
Awesome video. Thanks. but what are you typing off camera to:
1. enable the (inaudible) Snooping to stop flooding to the first laptop?
2. configure multicast to unicast to the laptop?
1. Depends on switch you're using. I just wanted to show the concept, that it has to be done.
2. Again, depends on device.
Tutorial??
nice video, but a little short :)
so can u show us how u stopped multicast? is it done on the switch ( have a smart switch) or on rasp pi?
tuturial pliz o backup pliz