What is IGMP query?
What is IGMP query?
The Internet Group Management Protocol (IGMP) is a communications protocol used by hosts and adjacent routers on IPv4 networks to establish multicast group memberships. IGMP is an integral part of IP multicast and allows the network to direct multicast transmissions only to hosts that have requested them.
How do I join the IGMP group?
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.)
What is IP IGMP query interval?
The default IGMP last member query interval is 1000 milliseconds. Command Modes. Interface (VLAN) switch configuration (config-switch-if)
What is IGMP multicast source?
Internet Group Multicast Protocol (IGMP) is used for the members of the multicast group to join or leave. SSM continues to use some of the supporting mechanisms common to other protocols. Multicast forwarding is based on source addresses, unlike unicast forwarding which relies on destination addresses.
How often are IGMP queries sent?
query-interval interval By default, the IGMP general query interval is 125 seconds.
How do multicast groups work?
Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients. A multicast group identifies a set of recipients that are interested in a particular data stream, and is represented by an IP address from a well-defined range.
What is IP IGMP Join Group?
“ip igmp join-group” causes the router to send an IGMP membership report on the interface where it is configured. The mcast packets will therefore be received and process switched by the router. This command is usually used for test purposes.
What are the message types used in IGMP?
IGMP Message Types
| Message Type | Description |
|---|---|
| v1 Membership Report | Identifies this message as an IGMPv1 Membership Report. |
| v2 Membership Report | Identifies this message as an IGMPv2 Membership Report. |
| v2 Leave Report | Used by IGMPv2 hosts to announce that they are leaving a multicast group. |
What is IGMP snooping querier?
The IGMP/MLD Snooping Querier is used to support a Layer 2 Multicast domain of snooping switches in the absence of a Multicast router. For example, where Multicast content is provided by a local server, but the router (if one exists) on that network does not support Multicast.
What is IGMPv2?
IGMPv2 is the revised version of IGMPv1 communication protocol. It has added functionality of leaving the multicast group using group membership.
What is Internet Group message protocol IGMP briefly explain types of query messages in IGMP?
The Internet Group Management Protocol (IGMP) is a protocol that allows several devices to share one IP address so they can all receive the same data. IGMP is a network layer protocol used to set up multicasting on networks that use the Internet Protocol version 4 (IPv4).
Why is IGMP needed?
IGMP is required for this product because the total amount of network traffic across the network needs to be reduced to avoid impacting the other connected devices. Without IGMP, the video extender would send the video signal to each of the devices on your network.