您好!组播排错通常分为如下几个步骤: 1、通过show ip pim rp mapping x.x.x.x 检查RP 2、通过show ip pim neighbour检查neighbor 3、通过show ip rpf x.x.x.x 检查root 4、检查*,G 和 S,G 5、Nexus检查常用的命令如下: show ip pim topology [sh ip mroute] show ip pim route [sh ip mroute] show ip igmp route show ip igmp snooping groups show ip msdp route show routing ip multicast show system internal forwarding ip multicast route show system internal ip igmp snooping show forwarding ip multicast route show forwarding distribution ip multicast route show forwarding distribution ip igmp snooping