（1）配置基于MSDP的Anycast RP示例
1.1.1. 组网需求
如图1所示，PIM-SM域拥有多个组播源和多个接收者。要求在PIM-SM域内建立MSDP对等体实现RP负荷分担。
图1 配置基于MSDP的Anycast RP组网图
1.1.2. 配置思路
设计方案：配置Anycast RP，接收者向拓扑距离最近的RP发起加入，组播源向拓扑距离最近的RP发起注册。步骤如下：
1. 配置各路由器的接口IP地址，在PIM-SM域内配置OSPF协议实现互联。
2. 使能组播功能，并在各接口上使能PIM-SM功能，在主机侧接口上使能IGMP功能。
3. 在RouterC和RouterD的Loopback10接口地址相同，配置C-RP。在Loopback1接口上配置C-BSR。
4. 在RouterC和RouterD的Loopback0接口上配置MSDP对等体。根据RPF规则，接收源RP发来的SA消息。
1.1.3. 操作步骤
1. 配置各路由器的接口IP地址和单播路由协议
# 按照图1，在PIM-SM域内，配置各路由器接口的IP地址和掩码，配置各路由器之间采用OSPF进行互连。具体配置过程略。
2. 使能组播功能，并配置PIM-SM功能
# 在所有路由器上使能组播功能，并在各接口上使能PIM-SM功能，在主机侧接口使能IGMP功能。其他路由器上的配置过程与RouterC上的配置相似，配置过程略。
代码语言：javascript复制[RouterC] multicast routing-enable
[RouterC] interface gigabitethernet 1/0/0
[RouterC-GigabitEthernet1/0/0] pim sm
[RouterC-GigabitEthernet1/0/0] quit
[RouterC] interface gigabitethernet 2/0/0
[RouterC-GigabitEthernet2/0/0] pim sm
[RouterC-GigabitEthernet2/0/0] quit
[RouterC] interface gigabitethernet 3/0/0
[RouterC-GigabitEthernet3/0/0] pim sm
[RouterC-GigabitEthernet3/0/0] igmp enable
[RouterC-GigabitEthernet3/0/0] quit3. 配置Loopback1、Loopback10接口，C-BSR、C-RP的位置
# 在RouterC和RouterD上分别配置Loopback1接口地址和相同的Loopback10接口地址，在Loopback1上配置C-BSR，在Loopback10上配置C-RP。RouterD上的配置过程与RouterC上的配置相似，配置过程略。
代码语言：javascript复制[RouterC] interface loopback 1
[RouterC-LoopBack1] ip address 3.3.3.3 255.255.255.255
[RouterC-LoopBack1] pim sm
[RouterC-LoopBack1] quit
[RouterC] interface loopback 10
[RouterC-LoopBack10] ip address 10.1.1.1 255.255.255.255
[RouterC-LoopBack10] pim sm
[RouterC-LoopBack10] quit
[RouterC] pim
[RouterC-pim] c-bsr loopback 1
[RouterC-pim] c-rp loopback 10
[RouterC-pim] quit4. 配置Loopback0接口和MSDP对等体
# 在RouterC上的Loopback0接口上配置MSDP对等体。
代码语言：javascript复制[RouterC] interface loopback 0
[RouterC-LoopBack0] ip address 1.1.1.1 255.255.255.255
[RouterC-LoopBack0] pim sm
[RouterC-LoopBack0] quit
[RouterC] msdp
[RouterC-msdp] originating-rp loopback0
[RouterC-msdp] peer 2.2.2.2 connect-interface loopback0
[RouterC-msdp] quit# 在RouterD上的Loopback0接口上配置MSDP对等体。
代码语言：javascript复制[RouterD] interface loopback 0
[RouterD-LoopBack0] ip address 2.2.2.2 255.255.255.255
[RouterD-LoopBack0] pim sm
[RouterD-LoopBack0] quit
[RouterD] msdp
[RouterD-msdp] originating-rp loopback0
[RouterD-msdp] peer 1.1.1.1 connect-interface loopback0
[RouterD-msdp] quit5. 检验配置效果
# 通过使用display msdp brief命令可以查看路由器之间MSDP对等体建立情况。RouterC和RouterD上MSDP对等体的显示信息如下：
代码语言：javascript复制<RouterC> display msdp brief
MSDP Peer Brief Information of VPN-Instance: public net
Configured Up Listen Connect Shutdown Down
1 1 0 0 0 0
Peer's Address State Up/Down time AS SA Count Reset Count
2.2.2.2 Up 00:10:17 ? 0 0
<RouterD> display msdp brief
MSDP Peer Brief Information of VPN-Instance: public net
Configured Up Listen Connect Shutdown Down
1 1 0 0 0 0
Peer's Address State Up/Down time AS SA Count Reset Count
1.1.1.1 Up 00:10:18 ? 0 0# 通过使用display pim routing-table命令可以查看路由器上的PIM路由。PIM-SM域内组播源S1（10.110.5.100/24）向组播组G（225.1.1.1）发送组播信息，用户User1加入组播组G，接收发往组G的组播数据。通过比较RouterC和RouterD上PIM路由的显示信息，可知当前有效RP是RouterC：S1向RouterC注册，User1向RouterC发起加入。
代码语言：javascript复制<RouterC> display pim routing-table
VPN-Instance: public net
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: WC
UpTime: 00:28:49
Upstream interface: Register
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: GigabitEthernet3/0/0
Protocol: static, UpTime: 00:28:49, Expires: -
(10.110.5.1, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: SPT 2MSDP ACT
UpTime: 00:02:26
Upstream interface: GigabitEthernet2/0/0
Upstream neighbor: 10.110.1.2
RPF prime neighbor: 10.110.1.2
Downstream interface(s) information:
Total number of downstreams: 1
1: GigabitEthernet3/0/0
Protocol: pim-sm, UpTime: 00:02:26, Expires: -
<RouterD> display pim routing-table无输出信息。
# User1退出组播组G，S1停止向组播组G发送组播数据。使用reset multicast routing-table all和reset multicast forwarding-tableall清除RouterC上的组播路由表项和转发表项。
代码语言：javascript复制<RouterC> reset multicast routing-table all
<RouterC> reset multicast forwarding-table all# 用户User2加入组播组G，S2（10.110.6.100/24）开始向组播组G发送组播数据。通过比较RouterC和RouterD上PIM路由的显示信息，可知当前有效RP是RouterD：S2向RouterD注册，User2向RouterD发起加入。
代码语言：javascript复制<RouterC> display pim routing-table无输出信息。
代码语言：javascript复制<RouterD> display pim routing-table
VPN–Instance: public net
Total 1 (*, G) entry; 1 (S, G) entry
(*, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: WC RPT
UpTime: 00:07:23
Upstream interface: NULL,
Upstream neighbor: NULL
RPF prime neighbor: NULL
Downstream interface(s) information:
Total number of downstreams: 1
1: GigabitEthernet3/0/0,
Protocol: pim-sm, UpTime: 00:07:23, Expires:-
(10.110.6.100, 225.1.1.1)
RP: 10.1.1.1 (local)
Protocol: pim-sm, Flag: SPT 2MSDP ACT
UpTime: 00:10:20
Upstream interface: GigabitEthernet2/0/0
Upstream neighbor: 10.110.2.2
RPF prime neighbor: 10.110.2.2
Downstream interface(s) information:
Total number of downstreams: 1
1: GigabitEthernet3/0/0
Protocol: pim-sm, UpTime: 00:10:22, Expires: -1.1.4. 配置文件
· RouterA的配置文件
代码语言：javascript复制#
sysname RouterA
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
ip address 10.110.5.1 255.255.255.0
pim sm
#
interface GigabitEthernet2/0/0
ip address 10.110.1.2 255.255.255.0
pim sm
#
ospf 1
area 0.0.0.0
network 10.110.1.0 0.0.0.255
network 10.110.5.0 0.0.0.255
#
return· RouterB的配置文件
代码语言：javascript复制#
sysname RouterB
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
ip address 10.110.6.1 255.255.255.0
pim sm
#
interface GigabitEthernet2/0/0
ip address 10.110.2.2 255.255.255.0
pim sm
#
ospf 1
area 0.0.0.0
network 10.110.2.0 0.0.0.255
network 10.110.6.0 0.0.0.255
#
return· RouterC的配置文件
代码语言：javascript复制#
sysname RouterC
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
ip address 192.168.1.1 255.255.255.0
pim sm
#
interface GigabitEthernet2/0/0
ip address 10.110.1.1 255.255.255.0
pim sm
#
interface GigabitEthernet3/0/0
ip address 10.110.4.1 255.255.255.0
pim sm
igmp enable
#
interface LoopBack0
ip address 1.1.1.1 255.255.255.255
pim sm
#
interface LoopBack1
ip address 3.3.3.3 255.255.255.255
pim sm
#
interface LoopBack10
ip address 10.1.1.1 255.255.255.255
pim sm
#
ospf 1
area 0.0.0.0
network 1.1.1.1 0.0.0.0
network 3.3.3.3 0.0.0.0
network 10.1.1.1 0.0.0.0
network 10.110.1.0 0.0.0.255
network 10.110.4.0 0.0.0.255
network 192.168.1.0 0.0.0.255
#
pim
c-bsr LoopBack1
c-rp LoopBack10
#
msdp
originating-rp LoopBack0
peer 2.2.2.2 connect-interface LoopBack0
#
return· RouterD的配置文件
代码语言：javascript复制#
sysname RouterD
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
ip address 192.168.3.1 255.255.255.0
pim sm
#
interface GigabitEthernet2/0/0
ip address 10.110.2.1 255.255.255.0
pim sm
#
interface GigabitEthernet3/0/0
ip address 10.110.3.1 255.255.255.0
pim sm
igmp enable
#
interface LoopBack0
ip address 2.2.2.2 255.255.255.255
pim sm
#
interface LoopBack1
ip address 4.4.4.4 255.255.255.255
pim sm
#
interface LoopBack10
ip address 10.1.1.1 255.255.255.255
pim sm
#
ospf 1
area 0.0.0.0
network 2.2.2.2 0.0.0.0
network 4.4.4.4 0.0.0.0
network 10.1.1.1 0.0.0.0
network 10.110.2.0 0.0.0.255
network 10.110.3.0 0.0.0.255
network 192.168.3.0 0.0.0.255
#
pim
c-bsr LoopBack1
c-rp LoopBack10
#
msdp
originating-rp LoopBack0
peer 1.1.1.1 connect-interface LoopBack0
#
return· RouterE的配置文件
代码语言：javascript复制#
sysname RouterE
#
multicast routing-enable
#
interface GigabitEthernet1/0/0
ip address 192.168.3.2 255.255.255.0
pim sm
#
interface GigabitEthernet2/0/0
ip address 192.168.1.2 255.255.255.0
pim sm
#
ospf 1
area 0.0.0.0
network 192.168.1.0 0.0.0.255
network 192.168.3.0 0.0.0.255
#
return
