mld snooping drop unknown multicast
In ipv4, in omada turning igmp snooping on results in flood unknown multicast being turned off
In ipv6, in omada turning mld snooping on results in flood unkonwn multicast being on
Is there a way to turn it off so when I use ipv6 multicast I dont get flooded traffic to things that aren't asking for it?
It is possible to do in standalone and works correctly, but I would prefer to use omada to centrally manage things
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Hi @Challpesa
Thanks for posting in our business forum.
In the controller mode, enabling IPv4 or v6 multicast, unknown will be discarded by default, checked with the test team.
How do you verify that IPv6 is not working? Wireshark results? Please provide the screenshots.
Standalone, you have the option to forward or discard.
BTW, where do you find MLD Snooping for the switch config? I don't find the place to configure MLD on the switch in controller mode.
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@Clive_A 
this is with MLD snooping turned on for that VLAN in omada
It doesn't do this with IGMP snooping, and it doesn't do this when I turn it on in standalone mode, because I can select the option to discard the unknown groups packets, instead of flooding them out all of the ports
Here is where the settings are in omada
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Hi @Challpesa
Thanks for posting in our business forum.
Challpesa wrote
@Clive_A this is with MLD snooping turned on for that VLAN in omada
It doesn't do this with IGMP snooping, and it doesn't do this when I turn it on in standalone mode, because I can select the option to discard the unknown groups packets, instead of flooding them out all of the ports
Here is where the settings are in omada
You should also see the same unknown group in the IPv4. It's just not that many.
Use this CLI:
ip igmp snooping drop-unknown and ipv6 mld snooping drop-unknown
You can use CLI Configuration > Device CLI to use them.
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no it doesn't happen with IGMP.
I've looked at it in a wireshark but you don't even have to. I'm so familiar with switch flooding at this point I can just look at the light patterns on the front of a switch and know if it's flooding or not
I will try to use the CLI commands from omada and see what happens
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