-3
votes
1answer
64 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 ...
1
vote
1answer
23 views

How to set up custom multicast address

What would it take to setup a custom made multicast ip address in the network? Machines are linux. Let's say I want to have a multicast address with only some machines from the network as group ...
-2
votes
1answer
67 views

why does a multicast server endlessly transmitting packets even no client require [closed]

i used to setup a multicast server using windows server 2003 OS, i can see a lot of packets transimitted from the server once it was started. Does it make sense when no one is requiring the multicast ...
-1
votes
2answers
105 views

What is the equivalent of 127.255.255.255 for OS/X machines so I can test broadcast udp packets without a network? [duplicate]

I am trying to test my program that makes use of broadcast UDP (not multicast!). In Linux, I can use the 127.255.255.255:64651 address and everything works beautifully, in other words, I send a packet ...
0
votes
2answers
153 views

Can heavy UDP traffic create network congestion?

I have three IP addresses using the same gateway. Two of them are configured as a cluster with multicast address setup. If there is a heavy UDP traffic between those two, can that affect the network ...
0
votes
2answers
35 views

unicast traffic on windows server

I have three servers with IP addresses (10.15.23.23, 10.15.23.24, 10.15.23.25). Server 1 and Server 2 have Tomcat installed and are configured as a cluster listening on a multicast IP address ...
0
votes
1answer
184 views

diagnostic multicast issue using wireshark

I have a network that is setup for multicast traffic. My setup is the following -Machine A : a server generates multicast traffic. -Machine A : few clients subscribing to that multicast traffic ...
1
vote
0answers
103 views

linux kernel configuration to filter multicast traffic based on interface

I have two virtual interfaces (eth0.2, eth0.3) in my PC. I am sending multicast data from eth0.2 to eth0.2. Multicast data is received in eth0.2 but also received in eth0.3, the other virtual ...
-1
votes
1answer
79 views

How multicasting grouping address works ? How can I add nodes to the existing group of multicasting group? [closed]

I am a newbie to the networking and working on the 6LoWPAN protocol and I am trying to get the multicasting to work on the network. But I don't know how to create group for multicasting and how to ...
1
vote
1answer
130 views

If I have a process which is supposed to be receiving data from multicast, how can I check if it actually is?

I can check gstack, but just because I see the listener threads on the recv call does not mean that call is not returning. One other thing I thought was to do something like: netstat -lupe | grep ...
2
votes
2answers
498 views

Solaris doesn't know which MAC address to use to send an UDP multicast message

I have a pair of Solaris 10 boxes which are supposed to send multicast UDP packets to a group of hosts. One of them works just fine, whereas the other one does not. The problem with the second ...
5
votes
1answer
126 views

Why would I ever (really) want to implement dense mode when dealing with PIM routing?

I'm introducing some PIM routing into my network to make some multicast traffic available across routers. I have read a bit on PIM, sparse mode versus dense mode. After reading, I am trying to ...
1
vote
0answers
1k views

Unable to ping multicast IP

Let me prefix this by saying I'm not entirely clear on how multicast works. I have the gist of it, but not the underlying functionality. A customer has configured a RHEL6 cluster between two Jboss ...
-2
votes
1answer
45 views

Motorolla TeamBadge Issue [closed]

I have A setup of Motorolla EBW100 Team Badges (typical Walkie Talkie). My wifi is configured as Such that it has Multiple SSIDs For different Badges. Like in Floor A I want 10 Team Badges to work ...
1
vote
1answer
463 views

IP-Multicast difference between 224.0.0.1-255 and 239.0.0.0/8 block

Whats the difference between: Local subnetwork Addresses in the range 224.0.0.0 to 224.0.0.255 are individually assigned by IANA and designated for multicasting on the local subnetwork only. ...
1
vote
1answer
260 views

Multicast in private LAN with different subnets

after i read Multicast IP Addresses and Multicast accross the subnets I am confused. Configuration: I have two devices in the same network. They may not be in the same Subnet, but ...
3
votes
1answer
2k 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 ...
0
votes
1answer
196 views

multicast streaming, too much network traffic?

I am thinking of switching our streaming servers to use multicasting instead of registering multiple clients and duplicating the streams manually on the server. It seems to work very well. However, I ...
2
votes
2answers
1k 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 ...
0
votes
3answers
709 views

Is there Muticast routing support on a Cisco 3750?

We have a switch (Cisco WS-C3750G-48TS) with only a C3750-IPBASE-M image (not a 'C3750-IPSERVICES-M' license). Is there any kind of multicast support here? All I need it to do is route multicast ...
2
votes
1answer
404 views

What is the difference between bind, network (interface) and multicast addresses?

The DatagramSocketImpl in Java has a joinGroup method that takes a socket address (IP and PORT) plus the interface address (IP and PORT). I am trying to understand the difference and purpose of each ...
7
votes
5answers
751 views

Convey multicast (to another LAN) through WAN disabling multicast

My Server and Client softwares run both on Linux. The Server broadcasts multicast, the Client listens multicast. My Client has to migrate to another site, and unfortunately multicast is not allowed ...
2
votes
1answer
647 views

altnet parameter into pimd.conf file

I need to route a multicast streams in my private network. I'm using pimd for multicast routing. The multicast routing did not work until I put altnet <multicast_source_ip> masklen 24 to the ...
1
vote
1answer
693 views

IGMP V3 support in Linux-2.6.35

I am trying to start a bridge connection and force it to use IGMPV3. The following command will explain my issue better : The below is the output of force_igmp_version before issuing brctl commands ...
1
vote
2answers
4k views

multicast routing - CentOS 5

I'm trying to pass mulitcast stream from interface eth1 (192.168.20.41) to interface tun0 (192.168.100.40) on CentOS 5. I can see incoming multicast stream on eth1: tcpdump -n -i eth1 type=1700 ...
0
votes
1answer
71 views

Can I use routes to influence which interface address multicast listeners use?

I have a server with multiple NICs on it. Each NIC is plugged into a different, isolated network that is serving multicast traffic. I have a program that listens to the multicast traffic on each of ...
1
vote
0answers
2k views

Can't get multicast to work (iperf)

I have some problems to get SLP (service location protocol; I play around with the OpenSLP implementation) to work. It uses multicast on 239.255.255.253, port 427. To narrow down the problem I decided ...
7
votes
4answers
12k views

How can I test Multicast UDP connectivity between two servers?

I have a two servers on the same subnet. I have an application installed which uses Multicast UDP to propagate events between the servers and keep them in sync. This does not seem to be happening, ...
2
votes
2answers
358 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 ...
1
vote
2answers
752 views

In what kind of environment multicast is not preferred?

While reading a product documentation I came across a line in which they say product supports TCP communication in environments where multicast is not available or preferred. Why would a company ...
2
votes
3answers
3k views

Basic multicast network performance problems

I've been using mpong from 29west's mtools package to get some basic idea of multicast latency across various Cisco switches: 1Gb 2960G, 10Gb 4900M and 10Gb Nexus N5548P. The 1Gb is just for ...
2
votes
4answers
611 views

Should a small company block multicast on their network?

Currently, the firewall at a small company is blocking multicast on their network. Should they continue to block multicast? Are there security concerns to unblocking it? Are there benefits to ...
0
votes
2answers
230 views

Unicast through Multicast

Suppose I have Multicast group with a group ID and I want to send packet to only one of the group members(as we are doing in anycasting). Is it possible? If yes then how?
2
votes
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 ...
2
votes
1answer
455 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 ...
2
votes
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 ...
10
votes
4answers
931 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 ...
3
votes
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 ...
4
votes
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 ...