In computer networking, multicast is the delivery of a message or information to a group of destination computers simultaneously in a single transmission from the source. Copies are automatically created in other network elements, such as routers, but only when the topology of the network requires ...

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What is the difference between unicast, anycast, broadcast and multicast traffic?

I have never had the privilege of working in an environment that required complicated routing or if it did require it, it was handled upstream of me. I've always used very simple static routing ...
5
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2answers
5k views

How managed switches handle Broadcast Multicast and Unicast?

Under typical scenarios, a network switch needs to handle broadcast, multicast and unicast messages at the same time. I'd like to understand On a typical managed switch (1Gb Ethernet/10Gb Ethernet), ...
3
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1answer
4k views

Multicast doesn't seem to be working on RHEL 5.5

I'm trying to install Oracle Grid Infrastructure on two machines. Their documentation states: You must enable multicasting for the cluster on the IP address subnet ranges 224.0.0.0/24 and ...
2
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1answer
755 views

Multicast accross the subnets

My application sends some UDP packets on a multicast address. In our office we have 3 subnets connected via routers. Sitting in my subnet I'm able to ping the IP of the other subnet. Will multicast ...
4
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4answers
5k views

Multicast File Transfers

I'm looking for some multicast file transfer software. Do you have any suggestions? Must be "quickly implementable", i.e. no Tivoli or other stuff that requires a massive infrastructure. Must run on ...
2
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2answers
3k views

Can I test broadcast packets on a single machine?

I want to have a server sending broadcast UDP packets and two other clients, in the same machine, receiving them. Can I do that somehow? What IP address would I use? @gravyface gave me hope but I ...
3
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2answers
2k views

IGMP/Multicast routing in Linux

I need to route IGMP/Multicast traffic across two networks. I have a Linux box with two NICs, one public, one private. Need devices on the private network to flow to public. I'm pretty certain I ...
3
votes
4answers
6k views

Why does multicasting make the WAN inaccessible?

I'm hesitant to ask this question as I may not be able to perform the diagnostic steps to find out what is up, but: I need to re-image a lab in a school, possibly during school hours. I am using a ...
2
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2answers
448 views

Multicast IP Addresses

I posted this on StackOverflow and was told it might be more appropriate here. I'm having trouble understanding how multicast addresses work. First off, is it true that if I have N clients or peers ...
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1answer
1k views

Create NSC-File for multicast streaming with Windows Media Streaming

For streaming multicast I need to create a NSC-file for the players - this file is pseudo-coded by Microsoft. Now I need to create this file for each proxy-publishingpoint. Is there any way to stream ...
1
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1answer
1k views

What affects multicast rates?

I'm experimenting the Trinity Rescue Kit (TRK) http://trinityhome.org/Home/index.php?wpid=1&front%5Fid=12 and it's ability to clone hard disks to many computers at one time using multicast ...
3
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1answer
171 views

Server Unresponsive with Spike in Multicast Packets Received

I got a server from UbiquityServers about a week ago, I installed a simple Apache server and it just serves up images. The server is under very little load because it simply is an origin server behind ...
2
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1answer
2k views

How to setup a static multicast ARP entry with Cisco SG300?

We're running a Microsoft NLB cluster in multicast mode as a loadbalancer. Using our old Cisco IOS switches we propagate access to the cluster to our branches using a static ARP entry in the core ...
2
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3answers
1k views

Why are my listener-less multicast packets affecting Wifi performance?

I've got a program that sends out a IPv6 multicast packet (to ff12::2:0:8afb:382b:c053:85f%en1) every 50ms. I've got it running on a very simple single-computer LAN (Mac mini <-wifi-> Linksys wifi ...
1
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1answer
1k views

How to make sysctl network bridge settings persist after a reboot?

I am setting up a notebook for software demo purpose. The machine has 8GB RAM, a Core i7 Intel CPU, a 128GB SSD, and runs Ubuntu 12.04 LTS 64bit. The notebook is used as a KVM host and runs a few KVM ...
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1answer
658 views

How to share multicast traffic to many vlans

I have linux computer , this computer connected with entire my network via zyxel gs-2200. In this zyxel also connected router with 500 vlans, one by client. On linux computer i have vlc program ...
0
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2answers
363 views

UPD Multicast (Class D) = How can this be routed over the internet?

is there a simple way (without setting up a local network via VPN) to route UPD Multicast Packets (224.0.0.0 to 239.255.255.255) from one server to another server (both residing in completely ...