Multicast Resumo

Multicast Resumo

1. Reverse Path Forwarding (RPF)

   • ???reforçar

2. IGMP

   • host to router - para se juntar ao grupo
   • IGMPV1
     • End hosts send requests to local routers to receive multicast traffic for a particular group
   • IGMPV2
     • new dynamic leave requests and querier election
   • IGMPV3
     • Adds multicast source filtering capability
   • IGMP Snooping
     • A switch passively inspects IGMP requests to determine which hosts should receive layer two multicast traffic

3. CGMP

   • used by switches to obtain multicast membership information for end hosts

4. range

   • 224.0.0.0/24 Local network control 224.0.1.0/24 Internetwork control 232.0.0.0/8 Source-specific 233.0.0.0/8 GLOP (RFC 3180) 239.0.0.0/8 Admin-scoped

5. common groups

   • 224.0.0.1 All hosts 224.0.0.2 All routers 224.0.1.39 Cisco RP Announce 224.0.1.40 Cisco RP Discovery

6. distrib tree

   • sourced tree
   • shared tree

7. PIM

   • DM
   • SM
     • central rendevous point
   • Sparse-Dense Mode
   • PIMV1
     • automatic RP discovery with Auto-RP
   • PIMV2
     • Automatic RP discovery is accomplished by the bootstrap router method