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What is multicast packet?
Multicast IP Routing protocols are used to distribute data (for example, audio/video streaming broadcasts) to multiple recipients. 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.
Does multicast work on WIFI?
Multicast has brought a lot of efficiencies to IP networks. But multicast wasn’t designed for wireless, and especially isn’t well suited for high-bandwidth multicast applications like video.
What is WIFI multicast?
Multicast transmission is a one-to-many broadcast methodology in which a WLAN AP forwards all broadcast packets from a multicast server source to a client subnet where multiple client devices are listening. The multicast server sends out a single stream during the transmission, allowing multiple clients to listen in.
What is multicast address in networking?
A multicast address is a logical identifier for a group of hosts in a computer network that are available to process datagrams or frames intended to be multicast for a designated network service.
Does multicast require a router?
In networks where there is no router present to act as a multicast router, a switch with IGMP snooping querier enabled can be used to generate the needed IGMP messages to get users to subscribe to multicast traffic.
How does multicast work on a wireless network?
Then, when a multicast packet is received, the network device can forward that packet to the intended receivers. Network devices that don’t support IGMP snooping will forward the packet the same as it would a broadcast, to every port except the port the packet came in on. Here’s an example of an IGMP Join request:
Can a wireless LAN controller ( WLC ) do multicast?
It is by no means an indept configuration for a networks multicast configuration. So to that end, here we go. This is the easiest method to use. When the WLC receives a Multicast packet, it replays that packet to every AP that is connected. Now this does work, but can be very network intense, as every AP gets the stream.
When to use multicast routing between WLC and AP?
When you use different VLAN/Subnet for AP and WLC then Multicast routing is mandatory on the wired side to support forwarding the downlink CAPWAP Multicast packet from WLC to AP.
What’s the data rate for a multicast signal?
Next, we’ll look at the data rate. Multicast is always sent at the basic rate, which was 6 Mbps for this BSSID, and a transmission time of 2072μs. Compared to M-to-U with a data rate of 540Mbps and a transmission time of 46μs.