配置全局路由表和VRF路由表之间的路由泄漏

1、拓扑图

2、R1配置

R1#sho run
Building configuration...

Current configuration : 1360 bytes
!
upgrade fpd auto
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip vrf R1
 rd 1:1
!
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
memory-size iomem 0
archive
 log config
  hidekeys
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip vrf forwarding R1
 ip address 1.1.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip vrf forwarding R1
 ip address 10.1.1.1 255.255.255.0
 duplex auto
 speed auto
!
router bgp 10
 no synchronization
 bgp router-id 1.1.1.1
 bgp log-neighbor-changes
 no auto-summary
 !
 address-family ipv4 vrf R1
  neighbor 1.1.12.2 remote-as 20
  neighbor 1.1.12.2 activate
  no synchronization
  network 10.1.1.0 mask 255.255.255.0
 exit-address-family
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

R1配置

3、R2配置

R2#sho run
Building configuration...

Current configuration : 1780 bytes
!
upgrade fpd auto
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip vrf R2
 rd 2:2
 import ipv4 unicast map R3
!
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
memory-size iomem 0
archive
 log config
  hidekeys
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip vrf forwarding R2
 ip address 1.1.12.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 1.1.23.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet1/0
 ip address 10.1.2.1 255.255.255.0
 duplex half
!
router bgp 20
 bgp router-id 2.2.2.2
 bgp log-neighbor-changes
 neighbor 1.1.23.3 remote-as 30
 !
 address-family ipv4
  neighbor 1.1.23.3 activate
  no auto-summary
  no synchronization
  network 10.1.1.0 mask 255.255.255.0
  network 10.1.2.0 mask 255.255.255.0
 exit-address-family
 !
 address-family ipv4 vrf R2
  neighbor 1.1.12.1 remote-as 10
  neighbor 1.1.12.1 activate
  no synchronization
 exit-address-family
!
ip forward-protocol nd
ip route 10.1.1.0 255.255.255.0 FastEthernet0/0
no ip http server
no ip http secure-server
!
!
!
!
ip prefix-list 1 seq 5 permit 10.1.3.0/24
ip prefix-list 1 seq 10 permit 10.1.2.0/24
!
!
!
!
route-map R3 permit 10
 match ip address prefix-list 1
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

R2配置

4、R3配置

R3#sho run
Building configuration...

Current configuration : 1269 bytes
!
upgrade fpd auto
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
memory-size iomem 0
archive
 log config
  hidekeys
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip address 10.1.3.1 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 ip address 1.1.23.3 255.255.255.0
 duplex auto
 speed auto
!
router bgp 30
 bgp router-id 3.3.3.3
 bgp log-neighbor-changes
 neighbor 1.1.23.2 remote-as 20
 !
 address-family ipv4
  neighbor 1.1.23.2 activate
  no auto-summary
  no synchronization
  network 10.1.3.0 mask 255.255.255.0
 exit-address-family
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

R3配置

5、华三全局路由表和VRF之间路由泄漏配置(写静态路由然后分别重分布到全局路由和VRF路由)

[H3C]dis current-configuration
#
 version 7.1.064, Release 0427P22
#
 sysname H3C
#
ip vpn-instance R2
 route-distinguisher 2:2
#
 system-working-mode standard
 xbar load-single
 password-recovery enable
 lpu-type f-series
#
vlan 1
#
interface NULL0
#
interface GigabitEthernet0/0
 port link-mode route
 combo enable copper
 ip binding vpn-instance R2
 ip address 1.1.12.2 255.255.255.0
#
interface GigabitEthernet0/1
 port link-mode route
 combo enable copper
 ip address 1.1.23.2 255.255.255.0
#
bgp 20
 router-id 2.2.2.2
 peer 1.1.23.3 as-number 30
 #
 address-family ipv4 unicast
  import-route static
  peer 1.1.23.3 enable
 #
 ip vpn-instance R2
  peer 1.1.12.1 as-number 10
  #
  address-family ipv4 unicast
   import-route static
   peer 1.1.12.1 enable
#
 scheduler logfile size 16
#
 ip route-static 1.1.1.0 24 vpn-instance R2 1.1.12.1
 ip route-static vpn-instance R2 3.3.3.0 24 GigabitEthernet0/1 1.1.23.3
#
return
[H3C]dis ip routing-table protocol static

Summary count : 1

Static Routing table status : <Active>
Summary count : 1

Destination/Mask   Proto   Pre Cost        NextHop         Interface
1.1.1.0/24         Static  60  0           1.1.12.1        GE0/0

Static Routing table status : <Inactive>
Summary count : 0
[H3C]dis ip routing-table protocol bgp

Summary count : 1

BGP Routing table status : <Active>
Summary count : 1

Destination/Mask   Proto   Pre Cost        NextHop         Interface
3.3.3.0/24         BGP     255 0           1.1.23.3        GE0/1

BGP Routing table status : <Inactive>
Summary count : 0
[H3C]dis ip routing-table vpn-instance R2 protocol static

Summary count : 1

Static Routing table status : <Active>
Summary count : 1

Destination/Mask   Proto   Pre Cost        NextHop         Interface
3.3.3.0/24         Static  60  0           1.1.23.3        GE0/1

Static Routing table status : <Inactive>
Summary count : 0
[H3C]dis ip routing-table vpn-instance R2 protocol bgp

Summary count : 1

BGP Routing table status : <Active>
Summary count : 1

Destination/Mask   Proto   Pre Cost        NextHop         Interface
1.1.1.0/24         BGP     255 0           1.1.12.1        GE0/0

BGP Routing table status : <Inactive>
Summary count : 0
[H3C]

参考链接：
       配置全局路由表和VRF路由表之间的路由泄漏（无下一跳）
       https://www.cisco.com/c/zh_cn/support/docs/ip/ip-routing/200158-Configure-Route-Leaking-between-Global-a.html
       在Cisco IOS XE上配置VRF泄漏
       https://www.cisco.com/c/zh_cn/support/docs/ip/ip-routing/216541-vrf-configuration-examples-on-ios-xe.html
       在 Cisco Nexus 交换机上配置 VRF 路由泄漏
       https://www.cisco.com/c/zh_cn/support/docs/ios-nx-os-software/nx-os-software/213908-configure-vrf-route-leak-on-nexus.html