AR28/AR46系列路由器MBGP组播扩展的典型配置

AR28/AR46系列路由器MBGP组播扩展的典型配置

【需求】

本例说明如何通过MBGP属性来管理路由选择。

所有路由器都配置MBGP。AS200中的IGP使用OSPF。路由器A在AS100中，并作为AS200中的路由器B和路由器C的MBGP邻居。路由器B和路由器C对路由器D运行IBGP，路由器D也在AS200中。

【组网图】

【配置脚本】

RouterA配置脚本

<RouterA> system-view [RouterA] interface serial 1/0/0 [RouterA-Serial1/0/0] ip address 192.1.1.1 255.255.255.0 [RouterA-Serial1/0/0] quit [RouterA] interface serial 1/1/0 [RouterA-Serial1/1/0] ip address 193.1.1.1 255.255.255.0 [RouterA-Serial1/1/0] quit # 启动MBGP。 [RouterA] bgp 100 [RouterA-bgp] ipv4-family multicast # 指定MBGP要发送的网络。 [RouterA-bgp-af-mul] network 1.0.0.0 [RouterA-bgp-af-mul] network 2.0.0.0 [RouterA-bgp-af-mul] quit # 配置对等体。 [RouterA-bgp] bgp 100 [RouterA-bgp] group a1 external [RouterA-bgp] peer 192.1.1.2 group a1 as-number 200 [RouterA-bgp] group a2 external [RouterA-bgp] peer 193.1.1.2 group a2 as-number 200 [RouterA-bgp] ipv4-family multicast [RouterA-bgp-af-mul] peer a1 enable [RouterA-bgp-af-mul] peer 192.1.1.2 group a1 [RouterA-bgp-af-mul] peer a2 enable [RouterA-bgp-af-mul] peer 193.1.1.2 group a2 [RouterA-bgp-af-mul] quit # 配置路由器A的MED属性。 # 路由器A上增加访问控制列表，允许网络1.0.0.0 [RouterA] acl number 2001 [RouterA-acl-basic-2001] rule permit ip source 1.0.0.0 0.255.255.255 # 定义两个路由策略，一个名为set_med_50，另一个名为set_med_100，第一个路由策略为网络1.0.0.0配置的MED属性为50，第二个的MED属性为100。 [RouterA] route-policy set_med_50 permit node 10 [RouterA-route-policy] if-match acl 2001 [RouterA-route-policy] apply cost 50 [RouterA-route-policy] quit [RouterA] route-policy set_med_100 permit node 10 [RouterA-route-policy] if-match acl 2001 [RouterA-route-policy] apply cost 100 # 应用路由策略set_med_50到路由器C（193.1.1.2）出口路由更新上，应用路由策略set_med_100到路由器B（192.1.1.2）的出口路由更新上。 [RouterA] bgp 100 [RouterA-bgp] ipv4-family multicast [RouterA-bgp-af-mul] peer a2 route-policy set_med_50 export [RouterA-bgp-af-mul] peer a1 route-policy set_med_100 export

RouterB配置脚本

<RouterB> system-view [RouterB] interface serial 1/0/0 [RouterB-Serial1/0/0] ip address 192.1.1.2 255.255.255.0 [RouterB-Serial1/0/0] quit [RouterB] interface serial 1/1/0 [RouterB-Serial1/1/0] ip address 194.1.1.2 255.255.255.0 [RouterB-Serial1/1/0] quit [RouterB] ospf [RouterB-ospf-1] area 0 [RouterB-ospf-1-area-0.0.0.0] network 194.1.1.0 0.0.0.255 [RouterB-ospf-1-area-0.0.0.0] network 192.1.1.0 0.0.0.255 [RouterB-ospf-1-area-0.0.0.0] quit [RouterB-ospf-1] quit [RouterB] bgp 200 [RouterB-bgp] undo synchronization [RouterB-bgp] group b1 external [RouterB-bgp] peer 192.1.1.1.1 group b1 as-number 100 [RouterB-bgp] group b2 internal [RouterB-bgp] peer 194.1.1.1.1 group b1 as-number 200 [RouterB-bgp] peer 195.1.1.1.2 group b1 as-number 200 [RouterB-bgp] ipv4-family multicast [RouterB-bgp-af-mul] peer b1 enable [RouterB-bgp-af-mul] peer 192.1.1.1 group b1 [RouterB-bgp-af-mul] peer b2 enable [RouterB-bgp-af-mul] peer 194.1.1.1 group b2 [RouterB-bgp-af-mul] peer 195.1.1.2 group b2

RouterC配置脚本

<RouterC> system-view [RouterC] interface serial 1/0/0 [RouterC-Serial1/0/0] ip address 193.1.1.2 255.255.255.0 [RouterC-Serial1/0/0] quit [RouterC] interface serial 1/1/0 [RouterC-Serial1/1/0] ip address 195.1.1.2 255.255.255.0 [RouterC-Serial1/1/0] quit [RouterC] ospf [RouterC-ospf-1] area 0 [RouterC-ospf-1-area-0.0.0.0] network 193.1.1.0 0.0.0.255 [RouterC-ospf-1-area-0.0.0.0] network 195.1.1.0 0.0.0.255 [RouterC-ospf-1-area-0.0.0.0] quit [RouterC-ospf-1] quit [RouterC] bgp 200 [RouterC-bgp] undo synchronization [RouterC-bgp] group c1 external [RouterC-bgp] peer 193.1.1.1 group c1 as-number 100 [RouterC-bgp] group c2 internal [RouterC-bgp] peer 194.1.1.2 group c2 as-number 200 [RouterC-bgp] peer 195.1.1.1 group c2 as-number 200 [RouterC-bgp] ipv4-family multicast [RouterC-bgp-af-mul] peer c1 enable [RouterC-bgp-af-mul] peer 193.1.1.1 group c1 [RouterC-bgp-af-mul] peer c1  next-hop-local [RouterC-bgp-af-mul] peer c2 enable [RouterC-bgp-af-mul] peer 194.1.1.2 group c2 [RouterC-bgp-af-mul] peer 195.1.1.1 group c2 [RouterC-bgp-af-mul] peer c2  next-hop-local # 配置路由器C的本地优先级属性。 # 在路由器C上加上访问列表2001，允许网络1.0.0.0。 [RouterC] acl number 2001 [RouterC-acl-basic-2001] rule permit source 1.0.0.0 0.255.255.255 [RouterC-acl-basic-2001] quit # 定义名为localpref的路由策略，该策略中配置了匹配ACL 2001（访问控制列表2001）的路由的本地优先级为200，不匹配的为100。 [RouterC] route-policy localpref permit node 10 [RouterC-route-policy] if-match acl 2001 [RouterC-route-policy] apply local-preference 200 [RouterC-route-policy] quit [RouterC] route-policy localpref permit node 20 [RouterC-route-policy] apply local-preference 100 # 应用此路由策略到来自BGP邻居193.1.1.2（路由器A）上的入口流量上。 [RouterC] bgp 200 [RouterC-bgp] ipv4-family multicast [RouterC-bgp-af-mul] peer c1. route-policy localpref import

RouterD配置脚本

<RouterD> system-view [RouterD] interface serial 1/0/0 [RouterD-Serial1/0/0] ip address 194.1.1.1 255.255.255.0 [RouterD-Serial1/0/0] quit [RouterD] interface serial 1/1/0 [RouterD-Serial1/1/0] ip address 195.1.1.1 255.255.255.0 [RouterD-Serial1/1/0] quit [RouterD] ospf [RouterD-ospf-1] area 0 [RouterD-ospf-1-area-0.0.0.0] network 194.1.1.0 0.0.0.255 [RouterD-ospf-1-area-0.0.0.0] network 195.1.1.0 0.0.0.255 [RouterD-ospf-1-area-0.0.0.0] network 4.0.0.0 0.0.0.255 [RouterD-ospf-1-area-0.0.0.0] quit [RouterD-ospf-1] quit [RouterD] bgp 200 [RouterD-bgp] undo synchronization [RouterD-bgp] group d1 internal [RouterD-bgp] peer 194.1.1.2 group d1 [RouterD-bgp] peer 194.1.1.2 group d1 [RouterD-bgp] ipv4-family multicast [RouterD-bgp-af-mul] peer d1 enable [RouterD-bgp-af-mul] peer 195.1.1.2 group d1 [RouterD-bgp-af-mul] peer 194.1.1.2 group d1

【提示】

为使配置生效，所有的MBGP邻居需要使用reset bgp all命令重设。