Устранение неполадок и настройка автоматического согласования соединений Ethernet 10/100/1000 Мбит/с в полудуплексном и дуплексном режимах
Contents
Introduction
Before You Begin
Conventions
Prerequisites
Components Used
Background Information
Multicast Address
Internet Group Management Protocol
IGMPv1
IGMPv2
IGMPv3
Interoperability Between IGMPv1 and IGMPv2
Interoperability Between IGMPv1/IGMPv2 and IGMPv3
IGMP on a Router<
Practical Example on a Router
Cisco Group Management Protocol
CGMP Frames and Message Types
Learning Router Ports
Joining a Group with CGMP
Leaving a Group With CGMP
CGMP and Source-Only Network
Configuring Cisco Routers and Switches to Enable CGMP
Practical Example of CGMP Use and Debug Command and Output
IGMP Snooping
IGMP Snooping Overview
Learning the Router Port
Joining a Group With IGMP Snooping
IGMP / CGMP Interaction
Multicast Source-Only Network
Limitations
Configuration of IGMP Snooping on Cisco Switches
Practical Example of IGMP Snooping
Related Information
Introduction
The purpose of Cisco Group Management Protocol (CGMP) and Internet Group Management Protocol (IGMP) snooping is to restrain multicast traffic in a switched network. By default, a LAN switch floods multicast traffic within the broadcast domain, and this can consume a lot of bandwidth if many multicast servers are sending streams to the segment.
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