1. Windows 10 Multicast Settings

I am looking for a good simple tool that runs on a standard OS (Windows or Linux) that I can used to test that multicast is being passed properly by a router. I have been asked by a client to enable multicast routing on a Linux box acting as their router since their to for a few features. Since I am not physically near the client I don't really have the ability to experiment with the various methods for setting up multicast routing on Linux. I can setup a router at my desk that is identical to what is deployed on their network, but I don't know of any good simple tools that I can use to generate or listen for multicast traffic. The one mulicast tool I have found is which is part of the Windows 2000/2003 resource kit.

Nping is an open source tool for network packet generation, response analysis and response time measurement. It is free and open source and runs on Linux, *BSD, Windows and Mac OS X.

From what I have read online it seems that mcast.exe does not work across a router, and only works on the local network, so that doesn't seem to be useful for me to test multicast routing. So what do tool(s) do you use to test that multicast routing is properly setup?

Don't have much real world multicast experience, but have you seen mz? Description: versatile packet creation and network traffic generation tool mausezahn (mz) is a fast traffic generator written in C which allows you to send nearly every possible and impossible packet. It is mainly used to test VoIP or multicast networks but also for security audits to check whether your systems are hardened enough for specific attacks.

Mausezahn can be used for example:. as traffic generator (e.g. To stress multicast networks);.

to precisely measure jitter (delay variations) between two hosts (e.g. For VoIP-SLA verification);. as didactical tool during a datacom lecture or for lab exercises;. for penetration testing of firewalls and IDS;. for DoS attacks on networks (for audit purposes of course);. to find bugs in network software or appliances;. for reconnaissance attacks using ping sweeps and port scans;.

Sebastien tellier divine. to test network behaviour under strange circumstances (stress test, malformed packets.). Homepage: There's also ssmping: Description: check your multicast connectivity Tools to check whether you can receive Source Specific Multicast (SSM) or Any Source Multicast (ASM) via either IPv4 or IPv6. If a host runs ssmpingd, users on other hosts can use the ssmping client to test whether they can receive SSM from the host. Another program called asmping is also provided to check whether can receive ASM. Homepage: Both installable on Ubuntu 10.10.

Iperf is perfect for this and it's readily available for most linux distributions and windows. On the listener side:% iperf -s -u -B 224.1.1.1 -i 1 - Server listening on UDP port 5001 Binding to local address 224.1.1.1 Joining multicast group 224.1.1.1 Receiving 1470 byte datagrams UDP buffer size: 110 KByte (default) -.and it will wait to hear from the source.

We have an established piece of software that uses IGMP UDP multicast messages to establish direct TCP communication. The software joins the multicast group using the address 224.100.0.1, then simultaneously sends UDP multicast messages while listening for UDP multicast messages from other copies of the same software running on other machines on the local network. The messages contain information then used for establishing direct TCP connections for further communication. This software has been running successfully for many years now on Windows XP machines.

We are in the progress of upgrading these machines to Windows 7, resulting in locations with mixed Windows 7 and XP machines on the same network, and have encountered a frustrating issue. Sometimes the Windows 7 machine will mysteriously refuse to send the multicast messages.

The software is running fine on Windows 7, but the UDP multicast messages are not even reaching the router, much less any other machines on the network. There is only one network interface on the Windows 7 machine, so it's not the known issue of Windows 7 multicast getting confused about which interface to broadcast on. The firewall is turned off, and the network adapter itself is set to allow broadcast messages through. What else could be blocking/misdirecting the multicast messages? Hi， We could take a try to add this IGMPVersion and IGMPLevel registry value in Windows 7, please note: please backup your registry settings before any modification.

Click Start, click All Programs, click Administrative Tools, and then click Windows Firewall with Advanced Security. In the navigation pane, right-click Windows Firewall with Advanced Security on Local Computer, and then click Properties. On each of the Domain Profile, Private Profile, and Public Profile tabs, change the Firewall state option to Off (not recommended). Click OK to save your changes. Arnav Sharma Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Click Start, click All Programs, click Administrative Tools, and then click Windows Firewall with Advanced Security.

In the navigation pane, right-click Windows Firewall with Advanced Security on Local Computer, and then click Properties. On each of the Domain Profile, Private Profile, and Public Profile tabs, change the Firewall state option to Off (not recommended). Click OK to save your changes. Arnav Sharma Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question.

This can be beneficial to other community members reading the thread. I'm not entirely familiar with all the intricacies of using WireShark, so if you have any good ideas on some filters to use, please let me know. From what I can tell from the captures I've done so far, there doesn't seem to be any IGMP traffic on the Windows 7 machine - yet I know there must be, as I can verify that our software is seeing the UDP multicast messages that it itself is sending. Filtering via the destination 224.100.0.1 shows only packets from the other computer, the one still running XP, so those packets are arriving - yet our software on the Windows 7 machine does not receive them. It's almost as if our software is joining and participating in a multicast group on a completely different network interface, yet there's only one interface it could be using. Even WireShark only shows the one interface it can be monitoring.

Windows 10 Multicast Settings

Hi， We could take a try to add this IGMPVersion and IGMPLevel registry value in Windows 7, please note: please backup your registry settings before any modification.