1-5Configuring IPv6 Multicast Routing and ForwardingConfiguration PrerequisitesBefore configuring IPv6 multicast routing and forwarding, complete the following tasks:z Configure an IPv6 unicast routing protocol so that all devices in the domain are interoperable at thenetwork layer.z Configure IPv6 PIM-DM or IPv6 PIM-SM.Before configuring IPv6 multicast routing and forwarding, prepare the following data:z Maximum number of downstream nodes for a single entry in the IPv6 multicast forwarding tablez Maximum number of entries in the IPv6 multicast forwarding tableConfiguring an IPv6 Multicast Routing PolicyYou can configure the router to determine the RPF route based on the longest match principle. Fordetails about RPF route selection, refer to RPF Check process.By configuring per-source or per-source-and-group load splitting, you can optimize the traffic deliverywhen multiple IPv6 multicast data streams are handled.Follow these steps to configure an IPv6 multicast routing policy:To do... Use the command... RemarksEnter system view system-view —Configure the device to selectthe RPF route based on thelongest matchmulticast ipv6 longest-matchOptionalThe route with the highestpriority is selected as the RPFroute by defaultConfigure IPv6 multicast loadsplittingmulticast ipv6 load-splitting{source | source-group }OptionalDisabled by defaultConfiguring an IPv6 Multicast Forwarding RangeIPv6 multicast packets do not travel infinitely in a network. The IPv6 multicast data of each IPv6multicast group must be transmitted within a definite scope. Presently, you can define an IPv6 multicastforwarding range by: Specifying boundary interfaces, which form a closed IPv6 multicast forwardingarea.You can configure the forwarding boundary for a specific IPv6 multicast group on all interfaces thatsupport IPv6 multicast forwarding. A multicast forwarding boundary sets the boundary condition for theIPv6 multicast groups in the specified range. If the destination address of an IPv6 multicast packetmatches the set boundary condition, the packet will not be forwarded. Once an IPv6 multicast boundaryis configured on an interface, this interface can no longer forward IPv6 multicast packets (includingthose sent from the local device) or receive IPv6 multicast packets.
