FAQ-接口收到Report报文接入并创建IGMP表项,但为什么PIM表项中没有相应出接口

发布时间:  2015-02-13 浏览次数:  73 下载次数:  0
问题描述
接口收到Report报文接入并创建IGMP表项,但为什么PIM表项中没有相应出接口?
解决方案
PIM表项的出接口是靠PIM的DR和Assert状态来决定的。在没有产生Assert的情况下,DR接口上会有出接口,但接口是非DR或者是Assert loser时,PIM表项不会添加相应的出接口。可通过命令display pim routing-table fsm来查看是否为Loser状态:
<HUAWEI> display pim routing-table fsm
VPN-Instance: public net
Total 0 (*, G) entries; 1 (S, G) entry

Abbreviations for FSM states and Timers:
     NI - no info, J - joined, NJ - not joined, P - pruned,
     NP - not pruned, PP - prune pending, W - winner, L - loser,
     F - forwarding, AP - ack pending, DR - designated router,
     NDR - non-designated router, RCVR - downstream receivers,
     PPT - prunepending timer, GRT - graft retry timer,
     OT - override timer, PLT - prune limit timer,
     ET - join expiry timer, JT - join timer,
     AT - assert timer, PT - prune timer 

(10.0.5.5, 225.0.0.2)
     RP: NULL
     Protocol: pim-sm, Flag: ACT SG_RCVR 
     UpTime: 00:01:11
     Upstream interface: Vlanif10
         Upstream neighbor: 2.2.2.3
         RPF prime neighbor: NULL
         Join/Prune FSM: [SPT: NJ] [RPT: NJ] 
     Downstream interface(s) information: None

     FSM information for non-downstream interfaces:
         1: Vlanif20
             Protocol: static
             DR state: [DR]
             Join/Prune FSM: [SPT: NI] [RPT: NI] 
             Assert FSM: [L, AT Expires: 00:02:58]
                 Winner: 10.3.3.2, Pref: 1, Metric: 1

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