OSPF多进程+IBGP(实验总结)
IBGP和OSPF多进程分流
实验地址：
简单的实验配置地址
要求：
1、业务分离，OSPF100的业务只能和OSPF100的业务通讯
2、业务分离，OSPF200的业务只能和OSPF200的业务通讯
3、后来新增了OSPF 2用于管理各区的设备，所以OSPF2能与OSPF100 、OSPF 200
通讯。
4、OSPF1 中还使用BGP，做RR会简单点，或IBGP全连接。
关健配置：
1、R3 /R6设备：
OSPF 100发布到BGP；打团体标记65000：100
OSPF 200发布到BGP；打团体标记65000：200
BGP发布到OSPF 100时，只匹配commuity为：65000:100
BGP发布到OSPF 200时，只匹配commuity为：65000:200
配置命令：
router ospf 100
redistribute bgp 65000 metric 1000 subnets route-map b-to-a100
network 172.16.37.0 0.0.0.3 area 0
!
router ospf 200
redistribute bgp 65000 metric 1000 subnets route-map b-to-a200
network 172.16.34.0 0.0.0.3 area 0
!
router bgp 65000
no synchronization
bgp redistribute-internal
redistribute ospf 100 metric 1000 match internal route-map a100-to-b
redistribute ospf 200 metric 1000 match internal route-map a200-to-b
neighbor 1.1.1.1 remote-as 65000
neighbor 1.1.1.1 update-source Loopback0
neighbor 1.1.1.1 next-hop-self
neighbor 1.1.1.1 send-community
neighbor 2.2.2.2 remote-as 65000
neighbor 2.2.2.2 update-source Loopback0
neighbor 2.2.2.2 next-hop-self
neighbor 2.2.2.2 send-community
no auto-summary
ip bgp-community new-format
ip community-list 1 permit 65000:1000
ip community-list 1 permit 65000:2
ip community-list 2 permit 65000:2000
ip community-list 2 permit 65000:2
route-map a100-to-b permit 10
set community 65000:100
route-map b-to-a100 permit 10
match community 1
route-map a200-to-b permit 10
set community 65000:200
route-map b-to-a200 permit 10
match community 2
2、RT1/RT2设备：
双向重发布要注意环路和负载均衡
BGP重发布到OSPF，过滤
RT1：RT2类似
ip prefix-list ospf seq 5 permit 172.16.110.0/30
。。。。。。
Router ospf 2
distribute-list prefix ospf in
redistribute bgp 65000 metric 1000 subnets route-map b-to-a21
route-map b-to-a21 permit 10
match community 2
set metric 100
route-map b-to-a21 permit 20
match community 1
set metric 50
ip community-list 1 permit 65000:100
ip community-list 1 permit 65000:200
ip community-list 2 permit 65000:2000
ip community-list 2 permit 65000:1000
!
OSPF重发布到BGP
route-map a2-to-b permit 10
set community 65000:2
router bgp 65000
no synchronization
bgp cluster-id 109
bgp log-neighbor-changes
bgp redistribute-internal
redistribute ospf 2 metric 100 match internal route-map a2-to-b
neighbor as65000 peer-group
neighbor as65000 remote-as 65000
neighbor as65000 update-source Loopback0
neighbor as65000 route-reflector-client
neighbor as65000 next-hop-self
neighbor as65000 send-community
neighbor 2.2.2.2 remote-as 65000
neighbor 2.2.2.2 update-source Loopback0
neighbor 2.2.2.2 next-hop-self
neighbor 2.2.2.2 send-community
neighbor 3.3.3.3 peer-group as65000
neighbor 6.6.6.6 peer-group as65000
no auto-summary
注意：
从IBGP重发布到IGP时，一定要配置一条：bgp redistribute-internal 团体列表：ip bgp-community new-format
所有IBGP设备配置邻居允许commnuity发送，