组播路由协议配置(cisco).doc

常用组播路由协议配置方法
IGMP协议配置
IGMP基本设置
配置路由器加入到一个组播组:
Router(config-if)# ip igmp join-group   
控制某个接口下主机能够加入的组播组
ip igmp access-group access-list
【例如】
Router(config)# access-list 1
Router(config)# interface 0
Router(config-if)ip igmp access-group 1
ACL可以同时对组播报文的源和目的地址控制,达到过滤组播源,同时也能过滤特定接收主机的作用,例如:
Deny all state for a group G
deny igmp any host G
permit igmp any any
Deny all state for a source S
deny igmp host S any
permit igmp any any
Permit all state for a group G
permit igmp any host G
Permit all state for a source S
permit igmp host S any
Filter a particular source for a group G
deny igmp host S host G
permit igmp any host G
IGMP版本切换
Router(config-if)# ip igmp version    {2|3}
IGMP查询间隔时间:默认60s
Router(config-if)# ip igmp query-interval 120
IGMP查询超时时间:默认为2倍的查询间隔时间
Router(config-if)# ip igmp query-timeout 30 
IGMP查询最大响应时间:默认为10s
Router(config-if)# ip igmp query-max-response-time 8
IGMP Proxy
如图2,当C收到组播请求后,发送一条PIM-SM  join的消息给B,B发送一个IGMP的请求到A,A通过一条单播链路将数据传送到B,这个过程就需要一个IGMP的代理,配置如下:
图2
【例如】
Router A Configuration  
interface 0  
ip address  
ip pim dense-mode 
! 
interface 1  
ip address  
ip pim dense-mode
ip igmp unidirectional link 
! 
interface 2 
ip address
Router B Configuration 
ip pim rp-address 5  
access-list 5 permit
!  
interface loopback 0  
ip address  
ip pim dense-mode
ip igmp helper-address udl 0
ip igmp proxy-service
!
interface 0 
ip address
ip pim dense-mode  
ip igmp unidirectional link  
!  
interface 1 
ip address
ip pim sparse-mode 
ip igmp mroute-proxy loopback 0 
! 
interface 2
ip address
Router C Configuration 
ip pim rp-address 5 
access-list 5 permit  
!
interface 0 
ip address