Multicast routing
| Routing schemes |
|---|
| Unicast
|
| Broadcast
|
| Multicast
|
| Anycast
|
Multicast Routing is one of the routing protocols in TCP/IP communication. [1]
In computer networking, there are several multicast group communication protocols where data transmission is addressed to a group of destination computers simultaneously. [2]
Overview
Multicast routing is a method of transmitting to all subscribers registered in a group by one transmission unlike unicast routing (i.e. OSPF,RIP) which transmits 1: 1 necessary data. [2] To implement the multicast routing, IGMP protocol and multicast routing protocol(Reverse-path forwarding, PIM-SM) for registration subscriber grouping and control traffic are required for multicast transmission.[2][3]
Routing mechanism
A multicast routing protocol is a mechanism for constructing a loop-free shortest path from a source host that sends data to the multiple destinations that receives the data. IPV4 uses Class D address (224.0.0.0 ~ 239.255.255.255) [2]
The tree classification
There are two types of trees which are the Source based tree and Share based tree. [2] [3]
Source based tree
It's SSM (Source Specific Multicast) protocol. The maximum delay is short between End-to-end communication. [2][3]
Share based tree
it's Core-Based Tree, Selecting one router in the network as the root and transmitting information through the root router. Maximum delay in tree is longer than SBT(Source-based tree), The core router manages all the information, and the remaining routers manage the direction of the core and the multicast information requested by the current neighboring router. it has a Good Scalability ( applicable to large network). Supported protocols include CBT, PIM-SM, etc.[2][3]
See also
- Anycast
- Any-source multicast
- Broadcast address
- Comparison of streaming media systems
- Content delivery network
- Flooding algorithm
- Network speaker
- Internet television
- List of streaming media systems
- Mbone, experimental multicast backbone network
- Multicast address
- Multicast lightpaths
- Non-broadcast multiple-access network
- Packet forwarding
- Push technology
- Session Announcement Protocol
- Source-specific multicast
- Broadcast, Unknown-Unicast and Multicast traffic
References
- ^ CISCO Security Research & Operations- 3 June 2015:Understanding Unicast Reverse Path Forwarding | Cisco -unicast-reverse-path-forwarding
- ^ a b c d e f g CISCO Security Research & Operations- 3 June 2015:IP Multicast Routing Technology Overview | Cisco IP Multicast Routing Technology Overview
- ^ a b c d Microsoft Multicast Routing Protocol Overview- 3 June 2015:Microsoft Multicast Routing Protocol Overview | Microsoft Multicast Routing ProtocolOverview