Huawei Exam H31-161 Topic 2 Question 71 Discussion

Refer to the exhibit.

As shown in the figure, PE 1 sets up an MP-IBGP neighbor relationship

with PE 2 and they communicate over MPLS LDP. A CE communicates with a PE over OSPF.

Configure the VRF on PE 1 as follows:

ip vpn-instance vrf1

route-distinguisher 100:1

vpn-target 1:1 export-extcommunity

vpn-target 1:1 import-extcommunityConfigure OSPF on PE 1 as follows:

ospf 1 vpn-instance vrf1

area 0.0.0.0

network 100.1.1.0 0.0.0.255

Configure BGP on PE 1 as follows:

bgp 100

peer 22.22.22.22 as-number 100

peer 22.22.22.22 connect-interface LoopBack0

#

ipv4-family unicast

undo synchronization

peer 22.22.22.22 enable

#

ipv4-family vpnv4

policy vpn-target

peer 22.22.22.22 enable

#

ipv4-family vpn-instance vrf1

import-route ospf 1

PE 2 has the same configurations as PE 1. MP-IBGP neighbor relationships have been set up

between PEs, and OSPF neighbor relationships have been set up between PEs and CEs. A valid route 1.1.1.1/32 is imported from CE 1 to an OSPF area, but CE 1 does not learn the route. What is the reason?