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How to let all multicast traffic through all ports with the GS110TP
Hi, I'm using this (POE) switch in a small office environment with little traffic so bandwidth savings is not much of an issue and would rather configure all ports the same to make things easier to ...
Hi Martmel
Disabling IGMP Snooping globally is the right way: by doing that we ensure any kind of Multicast traffic is flooded to all ports.
Unfortunately your screenshot is lowres and I can't really figure if this is done correctly on your switch. Do you have VLANs?
At this point I think we need to check if you disable all together:
Switching-->Multicast-->IGMP Snooping-->IGMP Snooping Configuration
- Auto-Video Configuration
- IGMP Snooping Status
- Validate IGMP IP Header
- Block Unknown Multicast Addresses
Switching-->Multicast-->IGMP Snooping-->IGMP Snooping Interface Configuration
- Click All for all ports and all LAGs
- Ensure Admin Mode is disabled for all ports
For all that please refer to the GS110TP Software Administration Manual page 41, then page 43, and then page 44-45.
Once checked please save the configuration and reboot the switch. Now we made sure there is no more Multicast filtering at Layer 2 in the switch. Your KNX routers should be able to send and receive Multicast traffic without being IGMP compliant. Please note this is very unsual use case though. At Layer 2 Multicast devices are expected to send and receive IGMP messages. If it still doesn't work, we will need to learn more about your KNX devices, and check if they are really sending Multicast traffic - and if they are succesfully working with other type of Ethernet switch - Unmanaged for instance.
It makes me realize it might be broadcast traffic instead? Sanity check: please go to Security-->Traffic Control, and then click the Storm Control link on the left menu and verify Storm Control is disabled all the way (no filtering at all - please see page 174 in the manual).
Hi Martmel,
Welcome to the community! :)
Let me share these articles below and use it as guides:
Configuring IGMP Snooping on the Netgear GS724Tv4
Regards,
DaneA
NETGEAR Community Team
Hello DaneA,
Thanks for the welcome, quick reply and links
I spent a little while reading the linked articles about configuring IGMP and as I want to disable all the smart multicast filtering, I disabled IGMP alltogether.
It however does not seem to make a difference if I enable or disable it.
Is there a simple switch that can be used to let all multicast through like on an unmanaged switch?
Thanks!
Martin
No matter how hard I try it, even if I disable Igmp, multicast is not forwarded to the other ports:
Is this switch so smart it can't be dumb?
Thanks for your help !
Martin
Can't anyone help me?
Hi Martmel
Disabling IGMP Snooping globally is the right way: by doing that we ensure any kind of Multicast traffic is flooded to all ports.
Unfortunately your screenshot is lowres and I can't really figure if this is done correctly on your switch. Do you have VLANs?
At this point I think we need to check if you disable all together:
Switching-->Multicast-->IGMP Snooping-->IGMP Snooping Configuration
- Auto-Video Configuration
- IGMP Snooping Status
- Validate IGMP IP Header
- Block Unknown Multicast Addresses
Switching-->Multicast-->IGMP Snooping-->IGMP Snooping Interface Configuration
- Click All for all ports and all LAGs
- Ensure Admin Mode is disabled for all ports
For all that please refer to the GS110TP Software Administration Manual page 41, then page 43, and then page 44-45.
Once checked please save the configuration and reboot the switch. Now we made sure there is no more Multicast filtering at Layer 2 in the switch. Your KNX routers should be able to send and receive Multicast traffic without being IGMP compliant. Please note this is very unsual use case though. At Layer 2 Multicast devices are expected to send and receive IGMP messages. If it still doesn't work, we will need to learn more about your KNX devices, and check if they are really sending Multicast traffic - and if they are succesfully working with other type of Ethernet switch - Unmanaged for instance.
It makes me realize it might be broadcast traffic instead? Sanity check: please go to Security-->Traffic Control, and then click the Storm Control link on the left menu and verify Storm Control is disabled all the way (no filtering at all - please see page 174 in the manual).
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