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Questions tagged [multicast]

Multicast is the mechanism using which data traffic is reduced thoughout the network if a certain number of receivers are interested in the same data from the same source. This increases the efficiency of the network as less packets needs to be processed by the intermediate routers in the network. An inverted(spanning)tree like traffic path is formed for multicast data. This ensures that packets are replicated only when necessary.

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How to get a stream with ffmpeg through a specific eth(interface)

I have a server with 2 interfaces, eth0 and eth1. eth0 -> conected to Managment Switch eth1 -> conectated to Video Switch I would like to get a multicast with ffmpeg through eth1. Is there some ...
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Can anyone tell me the reason as to why Windows applications have to send data through Multicast 224.0.0.1 and etc?

So I have DNS Client, IGMP, and UPnP all disabled in Windows 8 yet Windows applications such as Chrome, GoogleUpdate, and Windows Activation executable still tries so hard to send outbound UDP frames ...
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How can I block mDNS announcements only?

Is there a way to set up an ACL to block mDNS announcements only. We'd like to still allow the queries coming from remote devices, so completely blocking inbound UDP5353 isn't quite right. Thanks!
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Multicast Routing table configuration

I have two ethernet ports: From eth0 I receive live UDP data and from eth1 I send stream to UDP. All thing works good but problem is each time that before sending or receiving data I have to add ...
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1answer
202 views

IGMP and Wake On Lan

I have a Windows 10 server which has been operating well for some time using Wake On Lan. The Realtek adapter is set with Wake On Magic Packet enabled and Wake On Pattern Match disabled. Similarly, ...
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131 views

Windows 10 Mutlicast Routing with multiple Adapters

I have a Windows 10 System with 2 Network Adapters. Adapter 1 / IP 10.0.0.1 / 24 no def GW Adapter 2 / IP 192.168.0.1 / 24 def GW 192.168.0.254 Windows 10 Routes all Multicast Traffic to Adapter 1, ...
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1answer
130 views

Windows route selection and “route print -6” vs “netsh interface ipv6 show route”

So I'm using Windows 10 and I need to redirect some IPv6 multicast traffic to a specific interface (a USB-Ethernet adapter to be more specific). By default all multicast traffic is going to my WiFi ...
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1answer
303 views

IP TV (Multicast) not working on one PC

I can receive IP TV via Multicast using my ZyXEL ARMOR Z1 router. It works for my Surface Laptop and my mobile Device (LG G4) via WLAN without problems. With my Desktop PC it doesn't, neither using ...
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144 views

ffmpeg restreaming with an intermittent input

I have a live unicast stream that I restream as multicast. This works fine: ffmpeg -i <uri> -c:v copy -an -f rtp rtp://<multicast_ip>:<port> However, on occasion the input stream ...
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1answer
139 views

Does facebook multicast or unicast a live video? [closed]

I was wondering if Facebook uni-cast or multicast an ongoing live video streaming to a group of users. For example, if a user joins a live stream, will he/she get a separate uni-cast or multi-cast ...
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1answer
70 views

Routers block multicast request once node joins the same group

In the software I used, same "node" needs to join an IPv4 multicast group (to respond to the network protocol requests) but also needs to send requests to the same IPv4 multicast group (in order to ...
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230 views

Chromecast directly to specific IP Address

I've got a complicated network setup that involves multiple VLANS and subnets. The chromecast device is on a separate range to the laptops, however the two networks can communicate with each other ...
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165 views

if wireshark shows a layer 2 multicast packet on a WLAN should all connected clients receive it?

I have an Android device connected to a WLAN via a Cisco WAP121 access point. The android device runs an app that sends out an MDNS query for services. This all works fine for a while and then I stop ...
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0answers
121 views

Netgear X6S R7900P - Multicast

have a Netgear X6S R7900P set up as a Wireless AP which is connected to a Apple Airport Extreme. I ran into an issue where a multicast sent from one of the computers connected to the Apple Airport ...
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60 views

Why is my Mac persistently scanning multicast address?

I have a Linux machine with Psad installed. When I observe the log reports generated (admittedly I have Psad configured to be particularly sensitive), it lists a large number of scans originating ...
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1answer
142 views

Beacon interval low power mode

I am creating a UDP multicast net using Ubiquiti Rocket M2. None of the hardware receivers (ESP 8266) are on lower power mode. The only (possibly) low power device that is connected to the AP is my ...
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1answer
875 views

Why does router send packets to the multicast address?

I have a computer running linux and it has ufw activated with a couple of simple rules set. It is connected to ASUS 4G-N12 router by wifi. When I looked in ufw logs a few days ago it turned out that ...
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646 views

Set up multicast in MikroTik router and in PC

My internet provider broadcasts several TV channels over multicast on port 5004. They provided me with these instructions for enabling receiving of their multicast broadcast: In your case it is ...
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2answers
209 views

Remote shutdown of a group of linux servers (SNMP/Bonjour/socat?)

I have a group of linux servers on my subnet that I want to be able to remotely shutdown from a master machine. I don't want the non-master machines to have to coordinate with the master in advance, i....
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0answers
471 views

Avahi seems to stop publishing/refreshing services after a while

Firstable, I looked up to several Q/A, i can ensure that the following points are fullfiled: IGMP snooping isn't filtered by switch/router. Bonjour services (mDNSResponder.exe) is granted and allowed ...
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1answer
364 views

Multicast in LAN not received by all hosts

I'm writing an application to get multicast updates from a current-measuring device which is plugged into my LAN. The device sends out packets to multicast group 224.192.32.19:22600 every few minutes, ...
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1answer
361 views

Multicast in the MSC rate for 802.11n and 802.11ac

Is there any ath10k expert around here? Not sure if I could ask this question here. Otherwise, please direct me to the correct forum. I would like to know if there is any possible to operate ...
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1answer
312 views

Can Multicast cause network loops?

I've been dealing with a persistent network loop for the past month, trying different things. Now I see in one of my network interfaces that it recorded 1.6 million multicasts, and roughly half a ...
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2answers
73 views

Linux: is it possible to create instruction to check if connection between 2 hosts is possible?

I am running some software which is deployed on two different hosts.Hosts communicate via network. Linux is used on both. They use special port for communication. Also Multicast can be used. A ...
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0answers
442 views

VLC - Video Streaming Synchronization

Using VLC 2.2.4 Weatherwax. I'm streaming a video using UDP as multicast. Stream is displayed by 2 different clients using VLC. I'm trying to synchronize the display on these 2 clients. I've seen ...
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1answer
475 views

How to improve multicast in AP

I have more than 10 clients are connecting to that AP, pinging 30000 size packet. After 1 -2 hours, start to see 1-2 devices encountered tx-ccq low% (eg. 1 - 5%). Is this issue related with ...
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0answers
277 views

Discover multicast addresses in a network

Consider there is a network where users can access multicast streams by knowing the IP and port of the multicast streams. The traffic is not sent to them by default till they request the stream and if ...
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149 views

Receive multiple multicast on multi homed computer

I have a Windows program that receives information via multicast. My computer has two cards. I'd like to run two instances of the program and have each one sign up using a different multicast address ...
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0answers
52 views

Sending ihex file over UDP using sockets

I am working with IPv6 and UDP sockets using python-2.7. I am particularly focusing on IPv6 Multicasting ff02::1 where every Link-Local address device (with fe80::) responds to queries from a central ...
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1answer
207 views

Multicast with same IP generated by different servers

I have a simple config where 2 Windows servers are generating each multicasts on the same addresses. For example, on a direct Ethernet wired link between the servers they both generate the multicast ...
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1answer
18k views

How to connect two bluetooth speakers simultaneously via “Virtual Audio Cable”?

I have two speakers that I need to connect wirelessly via bluetooth. These are standard aux/usb speakers, and presently I've connected one of the speakers via 3.5mm jack to my windows 10 laptop. I ...
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1answer
3k views

Streaming multicast on VLC over ipv6

We are trying to send a multicast video stream using VLC 2.2.1 on ipv6 protocol between two computers - server and receiver. Both computers are connected via Ethernet cable from one network card to ...
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1answer
919 views

RTMP , RED5 multicasting

I am trying to implement multicast on a red5 server specific to an application called Bigbluebutton. It uses RTMP for audio, video and texts. problem: I cant use flash media server to implement the ...
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0answers
860 views

Windows firewall continues to log a dropped multicast packet, even though the rule matches on port

I have two executables that communicate via UDP multicast sockets on separate Windows machines connected via a hub. Machine 192.168.1.40 is not receiving the messages from 192.168.1.41. I have ...
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0answers
386 views

Windows hosted network not transmitting multicast H.264 stream

I am trying to have a Windows hosted network WiFi access point route a multicast stream to an associated computer. The following is my network layout: IP Camera --(Wired)--> Computer A --(Wireless)--...
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782 views

Enable multicast between server/client application

I have a VirtualBox VM running openSuse and an application that is meant to multicast data. I also have an application that is on the same machine running on Windows 7 that is meant to receive the ...
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1answer
8k views

How to make a multicast IPTV video stream accessible through WiFi, when it's only accessible through wired connection

So thanks to my service provider I'm able to watch some TV channels through the computer, using software (VLC, ffplay, MPlayer, etc) that is capable of playing multicast UDP streams. My problem is ...
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1answer
1k views

Multicast and broadcast networks and routing

I am using my computer for watching TV and also for internet browsing(listening to youtube, soundcloud, etc.). For watching TV I am using m3u playlist, with a IP addresses from multicast network(e.g. ...
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2answers
5k views

Getting Chromecast to work across subnets

I know Google says its not supported. Has anyone got a Chromecast to talk to a client on a different subnet? I have an OpenWRT router connected to my internet providers router (parent router). The ...
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1answer
3k views

VirtualBox multicast on a bridged network

using VirtualBox, I got two guests (DEBIAN7.7) on my host (WINDOWS7). Each of the two guests has a bridge network interface, eth1 and can ping the other one, I can see each eth1 has multicast enabled. ...
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1answer
75 views

Wireless Multicast transmission

I'm working on a high bandwidth application which uses multicast. Let's say there's 20 ip devices connected wireless to a router. One ip device sends a multicast packet to the multicast group. Will ...
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0answers
449 views

Stream Multicast channel on a website

I have a simple website with JWPlayer. Right now it is receiving a stream from my camera (rtmp protocol). I'm looking for a simple way to do the same thing with a multicast channel. I guess that I'm ...
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2answers
10k views

IPv6 multicast address for all nodes on network

I've got a basic network with 3 nodes (VM's). One node publishes an event, the other nodes listen for it and print something when received. It used to work one-on-one (so node gives event to each ...
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4answers
8k views

How do I enable/set multicast rules using firewalld in RHEL7 / CentOS 7

I cannot find docs on how to enable multicast for firewalld which is the default firewall in RHEL / CentOS 7. Can some enlighten me? FYI: I know how to do it using iptables.
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1answer
5k views

iperf returning “bind failed: cannot assign requested address” in Windows XP and 7

I am trying to set up iperf on an old HP server running Windows XP Professional to test multicast, but whenever I issue the command iperf -s -u -B <ip address>, it returns: bind failed: ...
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0answers
1k views

How to multicast live H264 without transcoding?

I have a live H264 stream (hardware encoded from the webcam) and I'd like to stream it over the network using multicast on a Linux platform. Because the platform has limited CPU power, and the data ...
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3answers
23k views

How do I disable multicast on the TCP/IP stack for Windows?

I'd like to disable the TCP/IP stack's support for multicast completely on Windows for diagnostic purposes. How do I do this? I'm looking to do this on Windows XP, but if none can be provided, ...
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2answers
4k views

Windows XP multicast route unable to be set on Windows 7

I have to set a route that I am setting in windows xp by using this command : route -p add 224.224.224.0 mask 240.240.240.0 150.1.2.194 metric 30 Under windows 7, this command doesn't work anymore (...
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1answer
535 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
2
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1answer
1k views

NTP Multicast configuration

I'm trying to get NTP multicast set up between a few computers. Right now I'm getting NTP multicast packets from a computer that I have neither access to nor information on (let's call that A) that is ...