S12508X-AF //ospf公网路由引入带有vpn实例BGP进程里面路由表不生效

不涉及

 现场ospf 1的公网路由引入带有vpn实例的BGP进程里面，发现bgp学习不到ospf的路由表信息。

具体配置如下，下面配置完后发现ospf 1的公网路由引入带有vpn实例的BGP进程里面，发现bgp学习不到ospf的路由表信息：

interface Vlan-interface3002

description vrf interface to External router

ip binding vpn-instance NCUT

ip address 172.16.54.6 255.255.255.252

ipv6 address 2001:DA8:20A:3000::6/126

bfd min-transmit-interval 750

bfd min-receive-interval 750

bfd detect-multiplier 3

ip vpn-instance NCUT

route-distinguisher 1:4100

bgp 65502

graceful-restart

graceful-restart timer restart 120

graceful-restart timer purge-time 360

router-id 172.16.53.4

ip vpn-instance NCUT

  router-id 172.16.53.4

  peer 172.16.54.5 as-number 65501

  peer 172.16.54.5 connect-interface Vlan-interface3002

  peer 172.16.54.5 ebgp-max-hop 64

  peer 172.16.54.5 bfd

 peer 172.16.54.17 as-number 65501

  peer 172.16.54.17 connect-interface Vlan-interface3005

  peer 172.16.54.17 ebgp-max-hop 64

  peer 172.16.54.17 bfd

  peer 2001:DA8:20A:3000::5 as-number 65501

  peer 2001:DA8:20A:3000::5 connect-interface Vlan-interface3002

  peer 2001:DA8:20A:3000::5 ebgp-max-hop 64

  peer 2001:DA8:20A:3000::5 bfd

  peer 2001:DA8:20A:3000::11 as-number 65501

  peer 2001:DA8:20A:3000::11 connect-interface Vlan-interface3005

  peer 2001:DA8:20A:3000::11 ebgp-max-hop 64

  peer 2001:DA8:20A:3000::11 bfd

  #

  address-family ipv4 unicast

   import-route ospf 1 route-policy School-TO-SDN     //去掉route-policy也是一样的无法引入ospf路由

   network 172.16.54.4 255.255.255.252

   peer 172.16.54.5 enable

   peer 172.16.54.5 preferred-value 65535

   peer 172.16.54.17 enable

   peer 172.16.54.17 preferred-value 65535

只有学习到直连路由表：

NCUT-Border-2#show ip route vrf NCUT | in 172.16.54

C        172.16.54.4/30 is directly connected, Vlan3002

L        172.16.54.5/32 is directly connected, Vlan3002

B        172.16.54.16/30 [200/0] via 172.16.53.17, 11:29:25

下面的BGP是公网实例的，可以学习到公网ospf的路由表信息。说明ospf是正常的，现在的问题就是公网的ospf的路由引入不到带有VPN实例的BGP里面去。

interface Vlan-interface3001

description vrf interface to External router

ip address 172.16.54.2 255.255.255.252

ipv6 address 2001:DA8:20A:3000::2/126

bfd min-transmit-interval 750

bfd min-receive-interval 750

bfd detect-multiplier 3

address-family ipv4 unicast

  import-route ospf 1 route-policy School-TO-SDN

  peer 172.16.54.1 enable

  peer 172.16.54.1 preferred-value 65535

  peer 172.16.54.13 enable

  peer 172.16.54.13 preferred-value 65535

在BGP-VPN实例里引入OSPF路由，---------------采用路由复制即可

参考案例 https://zhiliao.h3c.com/Theme/details/149091

在OSPF里引入BGP-IPv4路由+BGP-VPN路由。-------------------ipv4路由直接用import-route命令引入，bgp-vpn路由建议先用路由复制命令引入公网，然后再在ospf里采用import-route命令进行引入