Free H31-161 Exam braindumps download (H31-161 exam dumps Free)

QUESTION: 86

Refer to the exhibit.

As shown in the figure, inter-AS VPN Option A is used. CE 1 and CE 2 belong to the same VPN.AS 100 and AS 200 run IGP and LDP, respectively. ASBRs communicate with each other through EBGP. The loopback interface address of CE 1 is 10.1.1.1/24. Suppose CE 2 can ping CE 1.
Which router allocates an inner label when PE 2 forwards packets from CE 2 to CE 1?

PE 1
P1
ASBR 1
ASBR 2
P2

Answer(s): D

Show Answer Next Question

QUESTION: 87

Which of the following statements about the relationship between the SPE and the UPE are false?

The UPE provides access service for users. It maintains the routes of the VPN sites it is directly connected to and sometimes aggregates routes of remote VPN sites. In addition, a UPE allocates inner labels for routes of the sites directly connected to the UPE and advertises VPN routes with these labels to an SPE through MP-BGP.
The SPE manages and advertises VPN routes. It maintains all routes on the VPN it is connected to through UPEs, including routes of local and remote sites. The SPE, however, does not advertise routes of remote sites to the UPE, but only advertises the labeled default routes or aggregate routes of VPN instances.
The SPE and UPE are relative to each other. In a hierarchical PE structure, a PE on the upper layer is the SPE to PEs on the lower layer, and these lower-layer PEs are UPEs to the SPE. However, the hierarchical PE cannot coexist with common PEs on an MPLS network.
When MP-IBGP is deployed between an SPE and UPEs, the SPE can function as the RR of these UPEs so that routes can be advertised between IBGP peers. It is not recommended that an SPE serving as the RR of UPEs still reflect routes between other PEs so that routes on UPEs can be reduced. A UPE and an SPE communicate through a physical interface, subinterface, or tunnel interface.
When the tunnel interface is configured, only one MPLS network is allowed between them and labeled packets are transferred through tunnels. Their communication may fail if the MPLS network is replaced with an IP network.
The SPE has a large routing table, which provides excellent forwarding performance and access capability, whereas the UPE has a small routing table and poor forwarding performance, but occupies fewer interface resources.

Answer(s): C,E

Show Answer Next Question

QUESTION: 88

Refer to the exhibit

.
As shown in the figure, basic BGP/MPLS IP VPN configuration has been completed on routers.
Which of the following configurations is incorrect for advertising default routes in VPN instances on the SPE?
Note: All configurations are performed on the SPE.

Run the peer 2.2.2.2 enable command in the BGP-VPNv4 subsequent address family view to enable the peer to exchange BGP-VPNv4 routing information.
Run the peer 2.2.2.2 upe command in the BGP-VPNv4 subsequent address family view to designate the peer as a UPE of the SPE.
Run the peer default-originate vpn-instance command in the BGP-VPNv4 subsequent address family view.
Configure the default-route imported command in the BGP-VPN instance view without importing default IGP routes, and then configure the peer default-originate vpn-instance command in the BGP-
VPNv4 address family view.
Configure the peer default-originate vpn-instance command in the BGP-VPNv4 address family view, and then configure the default-route imported command in the BGP-VPN instance view.

Answer(s): D

Show Answer Next Question

QUESTION: 89

Refer to the exhibit.

OSPF process 1 is started on RTA and assigned to the vpn1 instance. After the vpn-instance-capability simple command is configured in the OSPF view, which of the following statements are false?

Bit B is not set in the router LSA generated by RTA in area 1.
When RTA receives a Type 3 summary LSA with the DN bit in area 1, it ignores the calculation of the LSA.
After RTA imports a BGP route from the MPLS VPN backbone network, if Domain ID of the BGP route is the same as that used in the local OSPF area and the BGP route is an intra-area route, a Type 3 summary LSA is generated and flooded to area 1.
When RTA imports a BGP route from OSPF process 1, an extended community identification must be carried to specify the OSPF attributes of the route.

Answer(s): B,C,D

Show Answer Next Question