Contents
Does multicast traffic can take more time to pass through a switch when IGMP snooping is enabled?
Multicast traffic can take more time to pass through a switch when IGMP snooping is enabled. ARP tables are held in nodes (e.g. – Dante devices, laptops, and other network endpoints).
What is IP multicast forwarding?
IP multicast routing enables a host (source) to send packets to a group of hosts (receivers) anywhere within the IP network by using a special form of IP address called the IP multicast group address. Any host, regardless of whether it is a member of a group, can sent to a group.
Should I turn off IGMP Snooping?
Multicast Snooping helps network switches supporting IGMP Snooping and routers to efficiently transmit multicast data packets to the designated receivers. Even if the switch or router offers the multicast IGMP Snooping feature, it should remain off to prevent unnecessary eavesdropping.
How does IGMP snoop on a multicast router?
The switch receives IGMP queries from multicast router on P1, so IGMP snooping learns that interface P1 is a multicast-router interface.
Do you need IGMP for multicast forwarding?
BTW the IGMP snooping works fine, but need running VLC to actively report its membership, after that I can see router forwarding multicast traffic. Routers do not forward multicast unless you have explicitly enabled multicast routing. That requires something like PIM. IGMP is a link-local protocol.
How does IGMP forward traffic to a switch?
When Switch A receives multicast traffic, it will not forward traffic to Switch. In the topology shown above, a switch connects to multicast source and hosts. Because there is no multicast router in this topology, no IGMP querier will be sent. Without the querier to respond to, a host does not send membership reports periodically.
Do you need to turn off IGMP snooping?
By default, traffic from unknown addresses is allowed. In rare circumstances, such as when you are having trouble with a streaming application, you might want to turn off IGMP snooping temporarily or allow traffic from unknown multicast addresses.