How does an IGMP client join a multicast group?
An IP multicast packet includes the multicast group (address) to which the packet belongs. When an IGMP client connected to a switch port needs to receive multicast traffic from a specific group, it joins the group by sending an IGMP report (join request) to the network.
What do you need to know about the IGMP protocol?
IGMP (Internet Group Management Protocol) is a Host-Router Multicast Signalling Protocol that provides dynamically registration of the hosts to the desired Multicast Groups. With IGMP, Host requests to join to the Multicast Groups. This join request comes to the DR (Designated Router).
When to send IGMP report to switch port?
When an IGMP client connected to a switch port needs to receive multicast traffic from a specific group, it joins the group by sending an IGMP report (join request) to the network. (The multicast group specified in the join request is determined by the requesting application running on the IGMP client.)
How are group specific query messages used in IGMP?
Group-Specific Query messages–Permits the IGMP querier to perform the query operation on a specific group instead of all groups. Leave-Group messages–Provides hosts with a method of notifying devices on the network that they wish to leave the group.
What does the IP IGMP join-group interface command do?
Both the ip igmp join-group interface command and the ip igmp static-group command cause the PIM to send Join requests upstream towards the source or towards the Rendezvous Point (RP), but this only occurs if the router with this command is the PIM Designated Router (DR) on that interface.
Which is the best version of IGMP to use?
Following are the versions of IGMP: 1. IGMPv1 : The version of IGMP communication protocol allows all the supporting hosts to join the multicast groups using membership request and include some basic features. But, host cannot leave the group on their own and have to wait for a timeout to leave the group.