IGMP and Layer 2 Issues参考.ppt

IGMP and Layer 2 Issues Group Membership IGMPv1—Packet Format IGMPv1—Joining a Group Joining member sends report to 224.1.1.1 immediately upon joining IGMPv1—General Queries The router periodically sends general queries to 224.0.0.1 to determine memberships(default 60s) IGMPv1—Maintaining a Group IGMPv1—Leaving a Group IGMPv2—Packet Format IGMPv2—Joining a Group IGMPv2—Joining a Group (cont.) IGMPv2—Querier Election IGMPv2—Querier Election IGMPv2—Maintaining a Group Router sends periodic queries Other members suppress reports One member per group per subnet report IGMPv2—Leaving a Group IGMPv2—Leaving a Group (cont.) H2 leaves group; sends leave message IGMPv2—Leaving a Group (cont.) IGMPv2—Leaving a Group (Cont.) IGMPv2—Leaving a Group (cont.) IGMP v3 — Query Message Format IGMP v3 — Report Message Format INCLUDE mode: The receiver announces membership and list of hosts from which to receive traffic. EXCLUDE mode: The receiver announces membership and list of hosts from which not to receive traffic. IGMP版本3－－Lite版 Layer 2 Multicast IGMP Snooping Cisco Group Management Protocol CGMP CGMP (cont.) END Multicast Configuration and Verification PIM-SM Configuration Commands Inspecting Multicast Routing Table show ip mroute Finding PIM Neighbors show ip pim interface show ip pim neighbor Checking RP Information show ip pim rp show ip rpf END NA-1#sh ip mroute IP Multicast Routing Table Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected L - Local, P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT, M - MSDP created entry, X - Proxy Join Timer Running, A - Advertised via MSDP, U - URD, I - Received Source Specific Host Report Outgoing interface flags: H - Hardware switched Timers: Uptime/Expires Interface state: Interface, Next-Hop or VCD, State/Mode (*, 224.1.1.1), 00:07:54/00:02:59, RP 10.127.0.7, flags: S Incoming interface: Null, RPF nbr 0.0.0.0 Outgoing interface list: Serial1/3, Fo