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Huawei H31-161 Exam Questions
HCIE-Carrier IP (Written) (Page 3 )

Updated On: 16-Feb-2026
Page 3 of 37
PDF with 180 Questions

Exhibit:



As shown in the figure, external route 1.1.1.0/24 is imported to RTA that is located in the NSSA area RTD is a backbone area router. RTB and RTC are both area border router (ABRs). OSPF configuration are as follows.



Which statement is true?

  1. RTD receive two external LSAs whose LS_ID is 1.1.1.0
  2. RTD receive an external LSAs whose LS_ID is 1.1.1.0 and advRouter is 2.2.2.2.
  3. RTD receive an external LSAs whose LS_ID is 1.1.1.0 and advRouter is 3.3.3.3.
  4. RTD receive an external LSAs whose LS_ID is 1.1.10/24 based on category 7 LSAs sent by RTA

Answer(s): C



1. On the backbone network , if a PE is connect to a CE, VPN instances need to b reconfigured on the PE, and interface on the PE for connecting to the CE must be bound to a VPN instance. After binding an interface to a VPN instance, you must configure the IP address of the interface between PEs, IS-IS configured for PE interworking. PLSA basic capabilities and MPLS LSP are configured for LSP establishment, and MP _IBGP is configured for VPN route exchange VPN routes exchange , LDAP is short for Label Distribution Protocol, and IBGP is short for interior Border gateway protocol.
2. A CE exchange route exchange routers with a PE over External Border gateway Protocol (EBGP. Configure interior gateway protocol (IGP) on the IS-IS+MPLS backbone networking to achieve the interworking between PEs and IP routers.

  1. -4
  2. -3
  3. -2
  4. -5
  5. -1

Answer(s): D



As shown in the figure. CE 1 and CE 3 belong to VPN-A, and CE 2 CE 2 4 belong to VPN-B VPN-target VPN-A is 111:1 and that of VPN-B is 222:2 users on different VPNs are not allowed to access each other. Configuration principles are as follows:
On the backbone network VPNs are not connected to a CE, VPN instance need to be configured on the PE, and an interface on the PE for connecting to the CE must be bounded to a VPN instance. After binding an interface to a VPN instance, you must configure the IP address of the interface Between

PEs, IS-IS is configured for PE interworking. MPLS basic capabilities and MPLS LDP are configured for MPLS LSP establishment, and MP-IBGP is configured for VPN route exchange.



How to enable CE 1 to learn routes from AS 64430?

  1. Import IS-IS 200 routes in IS-IS process 100
  2. Import IS-IS 100 routes in IS-IS process 100
  3. Import BGP routes in IS-IS process 100
  4. Import BGP routes in IS-IS process 200

Answer(s): C



Exhibit:



As shown in the figure, RTA belongs to AS 100 and has an EBGP neighbor relationship with RTC, RTD, and TTB is an IBGP neighbor of RTC, RTD, and RTE, and the four router all belong to AS 200. (
Note: The attributed not involved In the question use the default values)
1. Import route 1.1.1/32 from RTA and advertise this route to RTB by way of RTC, RTD, and RTE, respectively (suppose the three routers between is IGP, EGP, and INCOMPL:ETE, respectively.
Which route will RTB prefer?

2. Suppose the preceding policy is retained. Apply inbound routing policies on RTC, RTD, and RTE so that the values of the MED attribute of route 1.1.1.32 learned by RTB are 40, and 20 respectively.
Which route will RTB prefer?
3. Suppose the preceding policy is retained. Apply an inbound routing policy on RTB so that the values of the AS_ PATH attribute of route 1.1.1.1/32
Learned from RTC, RTD, and RTE are 10 20 30,and 10 20, respectively.
Which route will RTB prefer?
4. Suppose the preceding policy is retained. Apply an inbound routing policy on RTB so that the values of the local-preference attribute of route 1.1.1.1.32 learned from RTC and RTE are 30 and 120 , respectively.
Which route will RTB prefer.
5. Suppose the preceding policy is retained. Apply inbound policies on RTC. RTD and RTE so that the values of the preferred-value attribute of route 1.1.1.132 are 50.40 and 30 respectively.
Which route will RTB prefer?

  1. RTC. , RTC, RTE, RTC, RTE
  2. RTC, RTD, RTD, RTE. RTE
  3. RTC, RTC, RTD, RTC, RTE
  4. RTC, RTC, RTD, RTE, RTE

Answer(s): A



Exhibit:



As shown in the figure, RTA and have one BGP session. To detect fault fast, the BFD for BGP feature needs to be configured on RTA and RTB. BGP-related configurations are as follows:



The only Ethernet link between RTA and RTB becomes faulty when the BGP neighbor session is in ESTABLISHED state and the BFD session is in the UP state.
Which statements is true? (
Note: BFD works in asynchronous mode)

  1. RTA detect the fault faster than RTB.
  2. The BGP session between RTA and RTB is interrupted when the BGP hold time (time duration is 180s by default) express.
  3. RTB detect the fault faster than RTA.
  4. RTA and RTB detect the fault simultaneously.

Answer(s): C






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