5-8Configuration PrerequisitesBefore configuring basic MSDP functions, you need to configure:z A unicast routing protocolz PIM-SM basic functionsConfiguring MSDP Basic FunctionsFollow these steps to configure MSDP basic functions:To do... Use the command... RemarksEnter system view system-view —Enable MSDP function andenter MSDP view msdp RequiredDisabled by defaultCreate an MSDP peerconnectionpeer peer-addressconnect-interfaceinterface-type interface-numberRequiredNo MSDP peer connection iscreated by default.Configure a static RPF peer static-rpf-peer peer-address[ rp-policy ip-prefix-name ]OptionalNo static RFP is configured bydefault.Configuring Connection Between MSDP PeersAn AS may contain multiple MSDP peers. To avoid SA flooding between the MSDP peers, you can usethe MSDP mesh mechanism to improve traffic. When multiple MSDP peers are fully connected with oneanother, these MSDP peers form a mesh group.When an MSDP peer in the mesh group receives SA messages from outside the mesh group, it sendsthem to other members of the group. On the other hand, a mesh group member does not perform RPFcheck on SA messages from within the mesh group and does not forward the messages to othermembers of the mesh group. This avoids SA message flooding since it is unnecessary to run BGP orMBGP between MSDP peers, thus simplifying the RPF checking mechanism.The sessions between MSDP peers can be terminated and reactivated sessions as required. When asession between MSDP peers is terminated, the TCP connection is closed, and there will be noreconnection attempts. However, the configuration information is kept.Configuration PrerequisitesBefore configuring an MSDP peer connection, you need to configure:z A unicast routing protocolz Basic functions of IP multicastz PIM-SM basic functionsz MSDP basic functionsComplete the following tasks to configure an MSDP peer connection:Task RemarksConfiguring Description Information for MSDP Peers Optional
