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.

Filter by
Sorted by
Tagged with
0
votes
1answer
73 views

Connecting Nintendo Switches over Site-to-Site VPN

I have two sites connected with an OpenVPN tunnel on which I am trying to get two Nintendo Switch devices (one at each site) to see eachother so that they can game as if they're on the same LAN. All ...
0
votes
0answers
16 views

Are there downsides to blocking private and multicast ranges on a solitary VPS?

I use a solitary VPS at a provider, meaning that I do have other VPSs in that LAN. I do not want to communicate with other servers there. I am getting all kinds of traffic from private ip ranges and ...
0
votes
0answers
43 views

Why I'm getting all of this multicast traffic, and how to restrict it on particular vlan

I have small network in my home, which contains 1x router, 2x switch, 1x ap, some computers and phones. Aa I also have two servers in cluster (Proxmox) and one QNAP NAS storage, which I use to store ...
0
votes
1answer
232 views

IGMP Proxying, no traffic coming in

After posting this question to Network Engineering, I was told the site is about enterprise environments, whereas my setup is a residential network. Hence, I'll try my luck here. I managed to ...
0
votes
1answer
30 views

IPv6 Global Multicast

Here is my interface configuration. inet6 addr: 2001:db8:0:f101::1/64 Scope:Global inet6 addr: fe80::20c:29ff:feaa:c19e/64 Scope:Link Link local works ok. ping6 -I eth0 ff02::1 But how ...
1
vote
0answers
318 views

ffmpeg - copy http stream to multicast udp stream

i try to "copy" many tvheadend http streams to multicast udp streams the result should contain all streams: video, audio's and subtitels (especially epg) ...and at best without transcoding my ...
0
votes
0answers
27 views

Multicast to internet

I have network configuration: Gateway under Ubuntu 12 Has 2 NICs: eth0(mtu: 1500): 192.168.0.0/24 eth1(mtu: 1500): dhcp internet http://example.com i have multicast sources 192.168.0.31(mtu: 1500)...
0
votes
0answers
141 views

dvblast rtp stream to UDP multicast

I've used DVBLink IPTV Server for some time to receive IPTV via RTP and broadcast it to LAN via UDP multicast. DVBLink has discontinued this software in favour of TVMosaic, which happens to not ...
0
votes
1answer
103 views

Is it possible to find the Group IP of a local musticast network

I want to find the IP of the Multicast Groups I have joined. But, all the IP's obtained from netstat -ng are these: root@me:~# netstat -ng IPv6/IPv4 Group Memberships Interface RefCnt Group ----...
0
votes
0answers
30 views

Multicast name resolution in the latest Win10

Version 1803 (OS Build 17134.590) I haven't found any working solution for the multicast name resolution issue in Win10. I cannot imagine, that everybody started to set-up an own Domain Name Server ...
1
vote
1answer
3k views

Filtering TCPDUMP over packet length

I am looking to narrow down my tcpdump by packet length. I know I can `| grep but I was wondering if I can pass this particular packet length as an option in 'tcpdump'. I am trying to write a script ...
2
votes
0answers
798 views

List which applications are subscribing to a multicast group in Windows

I've been looking for way to list what processes/applications on my host are subscribing to what multicast addresses. Through the command line, I can issue netsh interface ip show joins which lists ...
0
votes
0answers
339 views

Multiple applications using same multicast group on the same Windows host

I am a software engineer designing a distributed software, in which the startup procedure utilizes IP multicasting to discover its peers. The software itself is distributed as different executable ...
0
votes
0answers
297 views

iptables Multicast Traffic Dropped on WAN

For my home router, I am running a small Debian box which connects to my ISP via a separate modem using PPPoE. I have had some iptables rules in place for quite a while which: Allow all traffic on ...
0
votes
1answer
2k views

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 ...
-1
votes
1answer
49 views

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 ...
5
votes
1answer
616 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, ...
1
vote
1answer
1k 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 ...
0
votes
1answer
1k 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 ...
1
vote
0answers
234 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 ...
0
votes
1answer
198 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 ...
1
vote
1answer
225 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 ...
0
votes
0answers
442 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 ...
1
vote
0answers
178 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 ...
0
votes
0answers
104 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 ...
0
votes
1answer
200 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 ...
6
votes
1answer
2k 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 ...
0
votes
0answers
921 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 ...
0
votes
2answers
421 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....
1
vote
0answers
649 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 ...
0
votes
1answer
619 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, ...
-2
votes
1answer
484 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 ...
1
vote
1answer
682 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 ...
1
vote
2answers
77 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 ...
2
votes
0answers
595 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 ...
0
votes
1answer
727 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 ...
0
votes
0answers
472 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 ...
0
votes
0answers
55 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 ...
0
votes
1answer
301 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 ...
3
votes
1answer
31k 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 ...
0
votes
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 computer - server and receiver. Both computers are connected via Ethernet cable from one network card to ...
0
votes
1answer
1k 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 ...
1
vote
0answers
1k 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 ...
1
vote
0answers
401 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)--...
1
vote
0answers
982 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 ...
0
votes
1answer
10k 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 ...
0
votes
1answer
2k 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. ...
8
votes
2answers
7k 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 ...
1
vote
1answer
4k 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. ...
0
votes
1answer
84 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 ...