网络工程 - MultiVRF (Cisco) 方案 - 路由目标导入 - 吾爱随笔录

我已经构建了一个 MultiVRF 测试场景，它按预期工作，但我的问题是，如何？

这是一个棘手的场景，CE 和 PE 之间的 VRF 具有不同的 RT 和 RD。

这是配置

R1：

ip vrf RED
 rd 65000:1
 route-target export 65000:1
 route-target import 65000:1  
!
interface Loopback900
 ip vrf forwarding RED
 ip address 1.1.1.1 255.255.255.255
!

interface FastEthernet0/0.900
 encapsulation dot1Q 900
 ip vrf forwarding RED
 ip address 192.168.0.2 255.255.255.252
!

router bgp 65000
 address-family ipv4 vrf RED
  neighbor 192.168.0.1 remote-as 3352
  neighbor 192.168.0.1 activate
 neighbor 192.168.0.1 send-community extended

  no synchronization
  network 1.1.1.1 mask 255.255.255.255
 exit-address-family

R2：

ip vrf RED
 rd 3352:50
 route-target export 3352:50
 route-target import 3352:50
!

interface Loopback900
 ip vrf forwarding RED
 ip address 2.2.2.2 255.255.255.255
!

interface FastEthernet0/0.900
 encapsulation dot1Q 900
 ip vrf forwarding RED
 ip address 192.168.0.1 255.255.255.252
!
 address-family ipv4 vrf RED
  neighbor 192.168.0.2 remote-as 65000
  neighbor 192.168.0.2 activate
  neighbor 192.168.0.2 send-community extended
  no synchronization
  network 2.2.2.2 mask 255.255.255.255
 exit-address-family
!

R1#sh ip bgp vpnv4 all 2.2.2.2
BGP routing table entry for 65000:1:2.2.2.2/32, version 6
Paths: (1 available, best #1, table RED)
Flag: 0x820
  Not advertised to any peer
  3352
    192.168.0.1 from 192.168.0.1 (2.2.2.2)
      Origin IGP, metric 0, localpref 100, valid, external, best
      Extended Community: **RT:65000:1**
      mpls labels in/out 16/nolabel

R1#ping vrf RED 2.2.2.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/28/36 ms

R2#sh ip bgp vpnv4 all 1.1.1.1
BGP routing table entry for 3352:50:1.1.1.1/32, version 5
Paths: (1 available, best #1, table RED)
Flag: 0x820
  Not advertised to any peer 65000
    192.168.0.2 from 192.168.0.2 (172.16.1.1)
      Origin IGP, metric 0, localpref 100, valid, external, best
      Extended Community: RT:3352:50
      mpls labels in/out 18/nolabel

因此，从 R2 的角度来看，我看到 1.1.1.1 具有 3352:50，即使 R1 正在导出具有 65000:1 的路由。

为什么我在每台路由器上都看到带有自己的 RD 和 RT 的 vpn4 路由？

也许我缺少一些明显的东西，但我似乎找不到答案。