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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 working on the switch, but the settings for IGMP snooping are different.
The VLAN that is needed IGMP snooping is Vlan1.
I have setted up the IGMP snooping trough this online manual; https://support.biamp.com/Tesira/AVB/Configuring_IGMP_Snooping_on_the_Netgear_GS724Tv4 .
(i have changed the vlan id's to match my connection.)
Now my IPTV and Internet connection is working, but all the led's on the switch are still constant blinking.
My config is as follow; See the screenshots below;
I hope that someone can tell me if these settings are correct, or can tell me how to go ferther with the config of my switch.
Thank you in advance, and sorry for my bad english.
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.
6 Replies
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,
Thanks for your trying.
As your said that GS105E work fine with your TV.
We will try it in our Lab.
Could you share me your TV's module? (apple?)
Did any device use MDNS for multicast forwarding?(AirPrint)
Which OS worked on your NIC?(Linux?Windows 10?)
Regards,
Daniel.
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