实验目的：观察BSR选举与RP发现  

组网图：                

        R1（serial 1/1）—————————（serial 0/1）R2

（1）R1上的关键配置：
!
ip multicast-routing
!
interface Loopback1
    ip address 1.1.1.1 255.255.255.255
    ip pim sparse-mode
!
interface Loopback2
     ip address 2.2.2.1 255.255.255.255
     ip pim sparse-mode
!
interface Serial1/1
      ip address 11.1.1.1 255.255.255.0
      ip pim sparse-mode
      serial restart-delay 0
！
ip route 1.1.1.2 255.255.255.255 Serial1/1
ip route 2.2.2.2 255.255.255.255 Serial1/1
!
ip pim bsr-candidate Loopback2 0
ip pim rp-candidate Loopback1 group-list 1
!
access-list 1 permit 224.1.1.1
access-list 1 permit 224.1.1.2
!
（2）R2上的关键配置：

!
ip multicast-routing
!
interface Loopback1
    ip address 1.1.1.2 255.255.255.255
    ip pim sparse-mode
!
interface Loopback2
     ip address 2.2.2.2 255.255.255.255
     ip pim sparse-mode
!
interface Serial0/1
      ip address 11.1.1.2 255.255.255.0
      ip pim sparse-mode
      serial restart-delay 0

!
ip route 1.1.1.1 255.255.255.255 11.1.1.1
ip route 2.2.2.1 255.255.255.255 11.1.1.1
！
ip pim bsr-candidate Loopback2 0
ip pim rp-candidate Loopback1
!

（3）调试信息

R1上查看信息：

R1#show ip pim bsr-router
PIMv2 Bootstrap information
  BSR address: 2.2.2.2 (?)
  Uptime:      00:36:13, BSR Priority: 0, Hash mask length: 0
  Expires:     00:01:35
This system is a candidate BSR
  Candidate BSR address: 2.2.2.1, priority: 0, hash mask length: 0
  Candidate RP: 1.1.1.1(Loopback1)
    Holdtime 150 seconds
    Advertisement interval 60 seconds
    Next advertisement in 00:00:16
    Group acl: 1

R1#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is a candidate RP (v2)

Group(s) 224.0.0.0/4
  RP 1.1.1.2 (?), v2
    Info source: 2.2.2.2 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:03:50, expires: 00:02:14
Group(s) 224.1.1.1/32
  RP 1.1.1.1 (?), v2
    Info source: 2.2.2.2 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:14:29, expires: 00:01:57
Group(s) 224.1.1.2/32
  RP 1.1.1.1 (?), v2
    Info source: 2.2.2.2 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:14:47, expires: 00:01:39
R1#

R2上查看信息：

R2#show ip pim bsr-router
PIMv2 Bootstrap information
This system is the Bootstrap Router (BSR)
  BSR address: 2.2.2.2 (?)
  Uptime:      00:19:43, BSR Priority: 0, Hash mask length: 0
  Next bootstrap message in 00:00:18
  Candidate RP: 1.1.1.2(Loopback1)
    Holdtime 150 seconds
    Advertisement interval 60 seconds
    Next advertisement in 00:00:30
R2#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is a candidate RP (v2)
This system is the Bootstrap Router (v2)

Group(s) 224.0.0.0/4
  RP 1.1.1.2 (?), v2
    Info source: 2.2.2.2 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:05:48, expires: 00:01:41
Group(s) 224.1.1.1/32
  RP 1.1.1.1 (?), v2
    Info source: 11.1.1.1 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:16:28, expires: 00:02:01
Group(s) 224.1.1.2/32
  RP 1.1.1.1 (?), v2
    Info source: 11.1.1.1 (?), via bootstrap, priority 0, holdtime 150
         Uptime: 00:16:46, expires: 00:01:40
R2#

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