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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1answer
829 views

Lot of Multicast traffic on LAN

Recently the whole network at work is being hit by multicast traffic originating on the LAN itself. I did some investigating and the service which seems to be responsible is ws-discovery. I have ...
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1answer
430 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
869 views

Wireless Multicast Forwarding on OpenWRT

Good day! We need to connect an STB device over wi-fi to the router. STB uses multicast only. Using udpxy is not possible. Original firmware forwards multicast over wi-fi using mac changing ...
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1answer
213 views

Is IGMP multicast traffic to a Xen VM host legitimate?

I run two Xen/CentOS 6.5 based VMs, both hosted by the same company, but connected to different networks (basic /24s w/ a single gateway at .1) in different physical locations. I developed an iptables ...
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1answer
224 views

Enable multicast on dummy interface on startup

I have a dummy interface on a Centos 6.3 machine which I would like to use for multicast traffic. The problem is it does not come up with the MULTICAST option by default; I need to manually add it ...
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1answer
1k 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 ...
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1answer
323 views

Windows Deployment workflow

I've been digging around and getting WDS, WAIK, and the Deployment Workbench all configured and installed on a server we'll be using to roll images out to classrooms. I want to make sure I understand ...
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1answer
781 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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1answer
37 views

Window 7 source-specific multicast (SSM)

We are planning to stream video feeds over multicast to managed Windows 7 devices. Does Window 7 support source-specific multicast at the OS layer (as the receiver)? It appears that XP and Vista both ...
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1answer
90 views

DNS resolution on multicast IP

Edit: Looks like ns lookup on some mcast IP doesn't not get a failed answer right away. Any suggestion? I have two env, the new one we built is running BIND on linux. When running lsof or tcpdump, ...
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1answer
169 views

multicast network based on bridges between two hardware servers

+------------------------+ Internet +----------------------+ | Server_1 | | | Server_2 | | VPS1 ---- br0 __ | (router) | __ VPS4| ...
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1answer
598 views

Multicasting Windows 7 Image

I am trying to deploy some new machines with windows 7 for the first time in our computer labs. We used to use third party imaging software and then run sysprep after the image was copied(XP), but it ...
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1answer
72 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 ...
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1answer
544 views

NLB Traffic Stops on all nodes when a single node is rebooted

We had a 2 node NLB cluster running IIS websites on virtual machines. Both nodes were online, the balancer functioned exactly as expected, (if traffic is 50/50 balanced, and you stop or drainstop a ...
0
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1answer
474 views

Multiple network interfaces and UDP packets distribution

I have a Linux server with 2 1Gb network interfaces eth1 and eth2. If I start 2 clients listening to the same multicast address and each client connects through a different NIC (say client 1 listens ...
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1answer
402 views

Multicast NAT on Juniper router

I am trying to do source NAT on a J-series router (junos 9.2). I have two separate NAT rules setup (using security policies + source-nat interface). One is for regular unicast TCP connections and the ...
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0answers
173 views

Manual Multicast forwarding with Linux router

I have a Linux router (Ubuntu). It is working well with unicast but with multicast routing/forwarding I have some trouble. The problem is that my hosts do not send igmp/mld messages thus the router ...
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0answers
134 views

network leave/unscribe multicast group

I have debian based server where I need to subscribe a multicast. After doing it with headless mpalyer I can see the following: root@ca1:~# netstat -g IPv6/IPv4 Group Memberships Interface ...
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0answers
18 views

IPSEC on linux with multiple remote ISP

I have configured 2 ipsec VPN connection from my linux server to my clients locations. the reason being the client has two ISPs a primary and a secondary on. The client wants to switch to secondary ...
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0answers
24 views

ospf hello not forwarded

I am trying to change the destination ip of ospf hello packet (224.0.0.5) to link local address using iptables rule (DNAT) . It does not seem to work. A similar rule for unicast packet (BGP control) ...
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152 views

Multicast route setup for multiple interface

Currently I have the below eth5 to receive multicast data for 239.1.1.31. It works. $ ifconfig eth5 Link encap:Ethernet HWaddr E4:11:5B:94:E1:F3 inet addr:10.185.2.2 ...
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0answers
58 views

ARP Tables on Windows vs Linux

I noticed on Windows Server 2008, Windows Server 2008 R2, and Windows 7 that IP multicast groups joined by a computer are recorded in the ARP table as static addresses automatically. However, the same ...
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0answers
107 views

How do get multicast to work on a Cisco AP1240?

I have a Cisco AP1142N in standalone mode acting as a simple AP. On the wired segment of the LAN, there is an Apple TV that is used to mirror laptop screens to a large TV screen. As long as clients ...
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108 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 ...
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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 ...
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0answers
74 views

How can I set up multicast tunnel between hosts on the same net

Dealing with AWS, where multicast packets won't travel even between systems on the same net (VPC). Generally, this is not specific to AWS, as this is generally possible in any network (i.e. you have a ...
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0answers
941 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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0answers
161 views

wdsmcast useage and deployment

I'm trying to use WDS multicasting to deploy an image. For some reason I can't get it to connect. Anyone know any guides on how to do this because I followed and few and none are working. I setup a ...
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0answers
184 views

Can multiple VLANs be provided with multicast addresses by a single MADCAP server?

Can a single DHCP server provide dynamic multicast addresses for hosts in many VLANs using MADCAP, just like it can provide hosts with unicast addresses via ip-helper? Or from a Cisco perspective, ...
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0answers
657 views

Debugging multicast connection over VPN

I'm running Ubuntu 11.10. I have a local application that is trying to receive multicast UDP streams via an OpenVPN tunnel. I have network connectivity to the remote host that is generating the ...
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236 views

Can I Override Multicast Address for One Specific Destination IP?

I have a Windows XP machine that is fitted with two Network cards. One card is used to access the company network and internet and its IP is assigned by DHCP whilst the second has a fixed IP and is ...
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0answers
796 views

Problems with multicast under Mac OSX Lion

We have been developing our Java applications under OSX for some time. Since switching to OSX Lion (version 10.7.1 now), we see sporadic issues around multicast packets going into the bit bucket and ...
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0answers
2k views

UDP Multicast not working without promisc. Already tried rp_filter=0

I'm having issues with multicast traffic in Ubuntu Maverick. It only appears to work when the card is in promisc mode (i.e. if I set it manually, or use a tool such as tcpdump). Adding multicast ...
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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 ...
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0answers
518 views

Multicast Default Interface - upgrade to RH5.5

I have upgraded a server from RH4 -> RH5.5 and we have an interesting issue with multicast. we have multiple NICS on the server, we want the bond0 to default as the default interface. adding route ...
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6 views

unicast to multicast using Mikrotik

I'm looking for a way to do NAT on a mikrotik router so that a unicast stream received on one interface goes out another interface as Multicast. I've done this on Cisco before, but my company is ...
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0answers
17 views

PIMD daemon needs long time to send PIM join message

I am using the PIMD daemon on Ubuntu Server 12.0.4 (32-bit). When it receives IGMPv2 membership report for certain group, it takes sometimes two, sometimes five seconds to send PIM join message to its ...
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0answers
51 views

Why are my multicast packet discarded?

I have two boxes and I have some issues when tcpreplaying a pcap full of multicast from one machine to the other. I see the packet incoming on the destination machine thanks to a tcpdump instance. ...
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0answers
81 views

Clonezilla SE Multicast Issues

This is my first go-around with Clonezilla SE. I have it on it's own, private, network where the server is also serving DHCP to the machines that join the network. Server: Dell Optiplex 790 (SFF) OS: ...
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0answers
90 views

How does the “Use IP address from the following range” option work in WDS?

I'm currently in the process of learning how I can setup a multicast session for installing several clients with the same image via Windows Deployment Services. I have been looking at the "Use IP ...
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0answers
286 views

Tomato RT-N16 - How to Prevent Multicast Packets from Reaching OpenVPN clients (TAP)

We have a remote (like in the woods) client using a VPN connection to connect to our office, using this link we can monitor and operate the remote client without a few hours drive in the wild. This ...
0
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0answers
231 views

How can I redirect/forward all the UDP/TCP traffic on one interface to another interface in OpenWrt

I am new to networking and I have a measurement device (D) that periodically sends all its readings over few UDP multicast sockets (with different multicast IP addresses and different port numbers). ...
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0answers
43 views

Multicast loopback under OpenVZ?

I'm trying to configure an OpenVZ container to allow sending/receiving multicast on the loopback interface. I've done this: ifconfig lo multicast route add -net 224.0.0.0 netmask 240.0.0.0 dev lo ...
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0answers
83 views

Net-SNMP Equivalent to netstat -g

I'm working on a project where it's necessary to determine the multicast groups that several Linux servers are subscribed to. While I know that you can easily get this by running netstat -g, one of my ...
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0answers
99 views

Libvirt/Qemu - Host cannot receive guest multicast

I'm attempting to setup multicast communication between a host and multiple guests. The guests can both send and receive all multicast messages from any guest and the host. However, the host cannot ...
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0answers
376 views

How to enable multicast routing in TMG 2010?

I have a TMG 2010 firewall between some office networks, which handles routing and firewalling; I need to let some application-specific multicast traffic flow between these networks; this is UDP ...
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0answers
146 views

MDNS multicast requests not received on wired interface

I have a Fedora 17 system with avahi configured to advertise a private service. The F17 is wired to a switch, to which is also connected a wireless AP. The client is wireless. The F17 firewall is ...
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0answers
502 views

vm multicast doesn't work

I have a windows host machine, sending out multicast and on the same machine I have an oracle virtualbox, running a linux VM with a bridged virtual network card, receiving the multicast. This setup ...
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0answers
537 views

Multicast Packets do not Reach all VPN Clients

I am trying to setup a PPTP VPN using RRAS on Server 2008 R2. I've got RRAS setup and working, and clients can connect to it using Windows XP or Windows 7 (my two target platforms.) However, my ...
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0answers
536 views

Multicast is not working with Linux

I have the multicast program which is working fine on windows , it is sending some message to range of IP. This works fine while I run it from windows, but when I run on Linux (with help of makefile) ...