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组播路由协议配置(cisco)

常用组播路由协议配置方法

1IGMP协议配置

1.1 IGMP基本设置

1.1.1配置路由器加入到一个组播组:

Router(config-if)# ip igmp join-group 225.2.2.2

1.1.2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 1 225.2.2.2 0.0.0.0

Router(config)# interface ethernet 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

1.1.3IGMP版本切换

Router(config-if)# ip igmp version {2|3}

1.1.4IGMP查询间隔时间:默认60s

Router(config-if)# ip igmp query-interval 120

1.1.5IGMP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

1.1.6IGMP查询最大响应时间:默认为10s

Router(config-if)# ip igmp query-max-response-time 8

1.2 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 ethernet 0

ip address 10.1.1.1 255.255.255.0

ip pim dense-mode

!

interface ethernet 1

ip address 10.2.1.1 255.255.255.0

ip pim dense-mode

ip igmp unidirectional link

!

interface ethernet 2

ip address 10.3.1.1 255.255.255.0

Router B Configuration

ip pim rp-address 10.5.1.1 5

access-list 5 permit 239.0.0.0 0.255.255.255.255

!

interface loopback 0

ip address 10.7.1.1 255.255.255.0

ip pim dense-mode

ip igmp helper-address udl ethernet 0

ip igmp proxy-service

!

interface ethernet 0

ip address 10.2.1.2 255.255.255.0

ip pim dense-mode

ip igmp unidirectional link

!

interface ethernet 1

ip address 10.5.1.1 255.255.255.0

ip pim sparse-mode

ip igmp mroute-proxy loopback 0

!

interface ethernet 2

ip address 10.6.1.1 255.255.255.0

Router C Configuration

ip pim rp-address 10.5.1.1 5

access-list 5 permit 239.0.0.0 0.255.255.255

!

interface ethernet 0

ip address 10.8.1.1 255.255.255.0

ip pim sparse-mode

!

interface ethernet 1

ip address 10.9.1.1 255.255.255.0

ip pim sparse-mode

1.3 IGMP Snooping

1.3.1开启IGMP轮询

Router(config)#ip igmp snooping

1.3.2IGMP Snooping调整

在单个vlan中启用Snooping:

ip igmp snooping vlan

1.3.3IGMP Snooping快速离开

ip igmp snooping vlan immediate-leave

The following example shows how to enable IGMP Immediate-Leave processing on VLAN 1:

Router(config)# ip igmp snooping vlan 1 immediate-leave

1.3.4IGMP Snooping参考多播路由

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