FAQ-S12708查看PIM协议组播路由表没有下行口,业务能通

发布时间:  2017-03-26 浏览次数:  184 下载次数:  0
问题描述

S12708查看pim routing-table表项没有下行口,业务能通;

配置的pim sm,组播业务正常播放,但是客户通过display pim rout查看PIM协议组播路由表发现下行口为空;

<HUAWEI> display pim routing-table
VPN-Instance: public net
Total 0 (*, G) entry; 1 (S, G) entry

(172.16.0.12, 227.0.0.1)
     RP: 10.2.2.2
     Protocol: pim-sm, Flag: SPT LOC ACT
     UpTime: 02:54:43
     Upstream interface: Vlanif 10
         Upstream neighbor: NULL
         RPF prime neighbor: NULL
     Downstream interface(s) information:

解决方案

通过display pim rout查看PIM协议组播路由表,对于组播流量转发来说是按照组播转发表进行业务转发的,通过命令display multicast routing-table和display multicast forwarding-table查看是有下行口的;所以业务能通,查找资料发现pim协议组播路由表中的下行口必须是开启pim协议的接口,查看客户配置发现vlanif 20接口没有开启pim sm,开启后表项正常了;
<HUAWEI> display multicast forwarding-table
Multicast Forwarding Table
Total 1 entry, 1 matched

00001. (172.16.0.12, 227.0.0.1)
     MID: 0, Flags: ACT
     Uptime: 00:08:32, Timeout in: 00:03:26
     Incoming interface: Vlanif10
     List of 1 outgoing interfaces:
       1:  Vlanif20
           Activetime: 00:23:15
     Matched 1775842131 packets(113653895502 bytes), Wrong If 0 packets
     Forwarded 1769618431 packets(1071392 bytes)

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