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GS724Tv4 Vlan1 IGMP Snooping
Hi everyone, I have a question about igmp snooping on my Netgear GS724v4 switch in combination with Routed IPTV. I have recently upgraded my GS105E swtich for a GS724v4 switch. All my vlans are ...
Hi Nick,
Welcome to NETGEAR community！
I have check the configuration from the screenshot you put.
The configuration is right and MFDB(multicast forward database) entry created dynamically by multicast device.
So multicast traffic should no longer be forwarded to the unknown devices which have not register to MFDB.
As you said, all port LED blinking all the same, meaning huge multicast traffic, two suggestions for you:
*Please backup the configuration on GS724Tv4 before you try these suggestion, easy to rollback in case not working.
1) Enable validate IGMP IP header to block invalid IGMP packets.
This function will help us block invalid IGMP packets which don't have a standard header.
*Note: We need to disable IGMP snooping global and then enable it to make the function above work correct.
*Can't make sure all TV follow the standard IGMP, so please rollback If your TV or PC can't receive multicast stream any more.
2) Try to take 2nd suggestion in case 1st one don't work.
Enable IGMP query mode on your VLAN.
This function will help you to identify other multicast device （Routed TV or Switch）.
You can also change the query interval to larger value for reducing network packets.
*Note: We need to disable IGMP snooping global and then enable it to make the function above work correct.
Hi Nick,
Welcome to NETGEAR community！
I have check the configuration from the screenshot you put.
The configuration is right and MFDB(multicast forward database) entry created dynamically by multicast device.
So multicast traffic should no longer be forwarded to the unknown devices which have not register to MFDB.
As you said, all port LED blinking all the same, meaning huge multicast traffic, two suggestions for you:
*Please backup the configuration on GS724Tv4 before you try these suggestion, easy to rollback in case not working.
1) Enable validate IGMP IP header to block invalid IGMP packets.
This function will help us block invalid IGMP packets which don't have a standard header.
*Note: We need to disable IGMP snooping global and then enable it to make the function above work correct.
*Can't make sure all TV follow the standard IGMP, so please rollback If your TV or PC can't receive multicast stream any more.
2) Try to take 2nd suggestion in case 1st one don't work.
Enable IGMP query mode on your VLAN.
This function will help you to identify other multicast device （Routed TV or Switch）.
You can also change the query interval to larger value for reducing network packets.
*Note: We need to disable IGMP snooping global and then enable it to make the function above work correct.
Thank you for your information,
Will try this tomorrow when i am back at home.
Let you know if the solution works.
Was home early today,
Tested the first setting, and my tv died. Validate IGMP header didnt work for my tv.
Second one turned on, and my lights are still blinking.
Will see how query mode will work for a couple of days.
Hi Nick_BI,
We'll look forward to your update on this. I'm sure other community members will be interested with your setup.
Thanks,
Hi Nick_BI,
Wow was your setup working? do you have any updates for us? We’d greatly appreciate hearing your feedback letting us know if the information we provided has helped resolve your issue or if you need further assistance. If your issue is now resolved we encourage you to mark the appropriate reply as the “Accepted Solution” so others can be confident in benefiting from the solution. The Netgear community looks forward to hearing from you and being a helpful resource in the future!
Thanks,
Hi, sorry for my late response, it was crazy at work.
Tested the first setting, and my tv died. After i eddited the setting Validate IGMP IP header to enable.
My drv gave an error that the stream could not be located.
Tested the second setting, changed the value to 60 and enabled the query mode, i didnt noticed so mutch difference. Sometimes my tv has artifacts, or sound glitches, about 1 every 10/15 minutes. Did not resolved the issue.
Tested also the settings with my GS105E, and there where no error's at all.
At the moment my tv and internet are working, but not at a 100%, sometimes i have the feeling there are still igmp packets dropped at nic's that wont require them.
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