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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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 ...
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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 ...
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1answer
494 views

JBoss without multicast?

Does anyone know if it is possible to run JBoss as a cluster using only unicast, no multicast? More importantly, does anyone have experience actually getting this to work?
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5answers
16k views

Linux Kernel not passing through multicast UDP packets

Recently I've set up a new Ubuntu Server 10.04 and noticed my UDP server is no longer able to see any multicast data sent to the interface, even after joining the multicast group. I've got the exact ...
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1answer
433 views

Clustering on cloud/VPS providers

I'm wondering if anyone can give some clustering recommendations to me. I'm currently on Linode, which I'm impressed and happy with, but they (along with just about every other VPS provider I know of) ...
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1answer
828 views

Lots of artifacts while streaming HD content with VLC 0.9.9 on CentOS

I'm trying to stream (multicast) a x264 encoded file using VLC. This in itself succeeds, but the stream has a huge lot of artifacts. This seems to suggest that the data cannot be transported fast ...
2
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1answer
479 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 ...
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2answers
867 views

Multicast image restoration with adaptive speed

I'm curious to know if there are any tools for restoring disk images (or even transferring files) via multicast -- for any platform, especially if the project has source available -- where the ...
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2answers
427 views

video streaming infrastructure advice

We would like to set-up a live video-chat web site and are looking for basic recomendations for software and hardware set-up. Here are the particulars on the site: Most streams will be broadcast ...
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1answer
812 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 ...
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2answers
341 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 ...
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3answers
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Windows Network Load Balancing on ESX Cluster with Dell PowerConnect stacks

We recently switched out our Cisco 6500 core switch for a pair of Dell PowerConnect 6248 stacks. Since then, our Network Load Balanced Sharepoint, which runs on two virtual machines on an ESX cluster ...
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1answer
169 views

Calculating and billing IP multicast usage on the Internet

I've been searching for the reasons why IP multicast isn't widely supported on the Public Internet, and a commonly-cited reason is the difficulty ISPs have in tracking Multicast usage for later ...
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1answer
987 views

Confusion about HSRP Groups

If I have a router that has several LANs on it, and each of these LAN is attached to a second router, do I need to use different HSRP groups for each LAN? With this set up, each virtual gateway will ...
2
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1answer
3k views

How DNS service discovery, multicast DNS and Bonjour are related?

I am a bit lost in the terminology. I wanted to start to use Bonjour. As the first step, I tried to find an easy way to use it. And I thought that I, probably, can call Bonjour from the command line ...
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4answers
1k views

Multicast in Rackspace cloud

On Amazon EC2, I cannot use multicast, but how about rackspace cloud? It would be very beneficial to be able to use multicast as most clustering protocols rely on it...
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4answers
955 views

How common are dropped packets in communications within a data center?

Let's say I have 2 machines in the same data center but not necessarily in the same rack. How common would dropped packets be when sent using UDP between these two machines? I'm asking under the ...
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2answers
673 views

Can a TCP/IP be efficiently multicast among clients without UDP

I have a high bandwidth application in which a server is to be producing data a rate of ~300Mb/s on a gigabit network. Is there a way other than UDP to multicast to 1 to 10 clients through a reliable ...
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3answers
528 views

Cisco multicast configuration

I'm on an isolated (for now) catalyst 3560e. I have a multicast source, which when enabled, causes flooding to all switch interfaces. I have a second different multicast source, which does not cause ...
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1answer
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What are good host firewall rules to allow UDP multicast?

I have a system with a restrictive firewall that will be participating in UDP multicasting (sending and receiving). What's a good set of rules to make the host's firewall allow this? This is my ...
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2answers
2k views

Using Clonezilla Server Edition with multiple multicast restore operations

I run a computer refurbishing operation for a local non-profit I am a part of. I have been looking into using Clonezilla to do network-based image-restoration. I am very interested in the multicast ...
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3answers
11k views

How to block all multicast traffic travelling through a Cisco Catalyst 3750

Something changed today. I can't seem to track down what, but one of our 3750s decided that it was going to forward all the multicast traffic it saw from the ghost server across every VLAN it has. ...
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4answers
5k 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 ...
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1answer
963 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 ...
2
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1answer
872 views

Video-on-demand/surveillance server setup

I'm planning to set up a service that would allow people to connect their ip-cameras to and watch video embedded into a website. Scheduled saving and replaying would also be available. What hardware ...
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3answers
2k views

DVMRP vs PIM-DM multicast protocols

Recently I've started to read RFCs of different multicast standards and came out to the question, which is not totally clear for me. I'm trying to compare DVMRP vs PIM-DM routing protocols in order to ...
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11answers
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Most resilient form of (private) DNS clustering?

I'm working on a setup with two datacenters linked by a MAN (bridged) and everything is doubled between them, in fail-over mode with RedHat Cluster, DRBD and that kinf of things. I have one DNS ...
4
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1answer
241 views

Current IP Multicast reference materials [closed]

Can anyone recommend a textbook or online resource for learning the current state of multicast technology, from the perspective of a network engineer/designer? The 'bible' that most of my more ...