求助:组播pim sparse-mode下配置Bootstrap Router（BSR）的问题

lanseyaoji218

如拓扑所示：
配置如下：
1.全网运行EIGRP，所有接口通告进EIGRP,单播全通
2.每台路由器都有环回口lo0，RX对应X.X.X.X 如R1环回口lo0地址是1.1.1.1
3.每台路由器全局开启组播，所有接口运行 ip pim sparse-mode，包括环回口
4.R2和R3各自的lo0，同时配置为C-BSR和C-RP，命令如下：
R2(config)#ip pim bsr-candidate Loopback0 0
R2(config)#ip pim rp-candidate Loopback0
R3(config)#ip pim bsr-candidate Loopback0 0
R3(config)#ip pim rp-candidate Loopback0
5.R5的F0/0加入组播组224.5.5.5，R6的F0/0加入组播组224.6.6.6

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在R2和R3各自的lo0接口上，没有配置访问控制列表、hash、优先级，所以上述参数均为默认
BSR、RP的选举的结果是：
1.在R2和R3中，R3是BSR，因为它的IP地址高
在R2上查看，显示BSR地址是3.3.3.3，而自己是candidate BSR
R2#show ip pim bsr-router
PIMv2 Bootstrap information
  BSR address: 3.3.3.3 (?)
  Uptime:      04:21:55, BSR Priority: 0, Hash mask length: 0
  Expires:     00:01:56
This system is a candidate BSR
  Candidate BSR address: 2.2.2.2, priority: 0, hash mask length: 0
  Candidate RP: 2.2.2.2(Loopback0)
    Holdtime 150 seconds
    Advertisement interval 60 seconds
    Next advertisement in 00:00:02
2.在R2和R3中，R2是RP，因为它的IP地址低
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现象
1.在R1、R2、R3、R4、R5、R6上都可以看到映射关系
以R1为例显示如下，其余的类似
R1#show ip pim rp mapping
PIM Group-to-RP Mappings

Group(s) 224.0.0.0/4
  RP 2.2.2.2 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:00:18, expires: 00:01:51
  RP 3.3.3.3 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:00:17, expires: 00:01:51
2.R1和R3输入命令show ip pim rp mapping  in-use，最后一行显示为空？？
以R1为例显示如下，R3类似
R1#show ip pim rp mapping in-use
PIM Group-to-RP Mappings

Group(s) 224.0.0.0/4
  RP 2.2.2.2 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:08:10, expires: 00:02:00
  RP 3.3.3.3 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:08:09, expires: 00:01:57

Dynamic (Auto-RP or BSR) RPs in cache that are in use:
3.R2、R4、R5、R6输入命令show ip pim rp mapping  in-use，最后一行却有显示
以R2为例显示如下，其余的类似
R2#show ip pim rp mapping in-use
PIM Group-to-RP Mappings
This system is a candidate RP (v2)

Group(s) 224.0.0.0/4
  RP 2.2.2.2 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:09:19, expires: 00:01:48
  RP 3.3.3.3 (?), v2
    Info source: 3.3.3.3 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 04:08:17, expires: 00:01:51

Dynamic (Auto-RP or BSR) RPs in cache that are in use:
Group(s): 224.0.0.0/4, RP: 2.2.2.2, expires: 00:00:58
4.在各个路由器查看RP情况，为什么R1和R3显示为空呢？？？这正常吗？怎么解决呢？
R1#show ip pim rp

R2#show ip pim rp
Group: 224.6.6.6, RP: 2.2.2.2, v2, next RP-reachable in 00:00:47
Group: 224.5.5.5, RP: 2.2.2.2, v2, next RP-reachable in 00:00:47

R3#show ip pim rp

R4#show ip pim rp
Group: 224.6.6.6, RP: 2.2.2.2, v2, uptime 04:05:00, expires 00:01:58
Group: 224.5.5.5, RP: 2.2.2.2, v2, uptime 04:05:00, expires 00:01:58

R5#show ip pim rp
Group: 224.5.5.5, RP: 2.2.2.2, v2, uptime 03:59:55, expires 00:01:53

R6#show ip pim rp
Group: 224.6.6.6, RP: 2.2.2.2, v2, uptime 04:05:12, expires 00:01:47

U-571

好厉害~~~