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Forum Discussion
IGMP Snooping
Hi, in my home network, I have a 2018 Orbi RBR50 router and have set it up with IGMP Proxying. However, I cannot find a setting for IGMP Snooping. I understand that IGMP Snooping is necessary for eff...
ekhalil wrote:
Orbi does not support IGMP snooping. Only IGMP proxying on the WAN port is supported.
Hm, what should be the purpose of this then? An IGMP proxy does enable hosts in a uni-directional link routing (UDLR) environment that are not directly connected to a downstream router to join a multicast group sourced from an upstream network. When I have it right, the IGMP proxy does also serve an the IGMP querier to the LAN. Rather useless if the multicast noise does go out over all links (both wireless and wired backhaul, all Ethernet ports, and all AP radios, isn't it?
ekhalil wrote:
Why do you need IGMP snooping? Do you have devices that use IGMP multicasting which affects the performance of your LAN network, for which you want to use IGMP snooping?
Major ISP introduced massive IGMP Multicast based IPTV solutions in the last years. In my understanding Noroddveien ISP does also provide live TV over IGMP Multicast.
FURRYe38 wrote:
Not alot of use for IGMP in most homes so maybe one reason why NG didn't add it ot the Orbi. Something to ask them about though.
It's the #1 industry standard used by ISPs for IPTV. Millions of deployments alone here in Switzerland by the major and smaller ISP feeding FullHD and UHD (4K). That's why non-managed switches can't be deployed anymore without causing massive issues - at least some Smart Managed Plus switches wuth IGMP Multicast support for one VLAN are required.
schumaku wrote:
Hm, what should be the purpose of this then? An IGMP proxy does enable hosts in a uni-directional link routing (UDLR) environment that are not directly connected to a downstream router to join a multicast group sourced from an upstream network. When I have it right, the IGMP proxy does also serve an the IGMP querier to the LAN. Rather useless if the multicast noise does go out over all links (both wireless and wired backhaul, all Ethernet ports, and all AP radios, isn't it?
IGMP Proxy and IGMP Snooping can achieve the same goal of reducing traffic replication. The router maintains a mapping table and forwards multicast traffic only to the hosts that have joined the specific multicast group.
schumaku wrote:
Major ISP introduced massive IGMP Multicast based IPTV solutions in the last years. In my understanding Noroddveien ISP does also provide live TV over IGMP Multicast.
IGMP Proxy should solve the issues that Noroddveien seeing. The only problem is that IGMP is directly connected to VLANs. Orbi -currently- supports VLAN tagging only for wired ports and not for wireless.
So by connecting the IPTV box to a LAN port in Orbi, configure a VLAN on it and activating IGMP Proxy should basically both improve the IPTV quality and prevent multicasting from affecting the other devices in the network.