H3C S3100 8C SI Operation Manual

Contents

H3C S3100 8C SI Operation Manual Manual pdf 318 page image

Operation Manual – MulticastH3C S3100 Series Ethernet Switches Chapter 1 Multicast Overview1-14z A multicast packet from Source arrives to VLAN-interface 1 of Switch C, and thecorresponding forwarding entry does not exist in the multicast forwarding table ofSwitch C. Switch C performs an RPF check, and finds in its unicast routing tablethat the outgoing interface to 192.168.0.0/24 is VLAN-interface 2. This means thatthe interface on which the packet actually arrived is not the RPF interface. TheRPF check fails and the packet is discarded.z A multicast packet from Source arrives to VLAN-interface 2 of Switch C, and thecorresponding forwarding entry does not exist in the multicast forwarding table ofSwitch C. The router performs an RPF check, and finds in its unicast routing tablethat the outgoing interface to 192.168.0.0/24 is the interface on which the packetactually arrived. The RPF check succeeds and the packet is forwarded.