Try Free Huawei H31-161 Updated Questions & Answers

Question 1

As shown in the figure, IGP is configured on RT 1 and RT 2, and route 193.3.6.0/24 is configured on RT 2. Which of the following statements is correct? Suppose OSPF is used here. Configure an access control list (ACL) on RT 2 in system mode.

ACL 2000

rule 5 permit source 193.3.6.0 0.0.0.255

Configure a routing policy in system mode:

route-policy t permit node 1

if-match acl 2000

apply backup-nexthop 106.108.4.1

apply backup-interface Ethernet4/0/4

Configure the IP FRR in system mode:

ip frr route-policy tConfigure the ethe4/0/4 interface of RT 2:

ospf cost 100

Configure BFD on RT 2:

Enable BFD on Ethernet4/0/3

bfd b1 bind peer-ip 106.108.3.1 interface Ethernet4/0/3

discriminator local 1

discriminator remote 1

min-tx-interval 10

min-rx-interval 10

process-pst

commit

Configuration on RT 1:

Enable BFD on Ethernet7/0/3

bfd b1 bind peer-ip 106.108.3.2 interface Ethernet7/0/3

discriminator local 1

discriminator remote 1

min-tx-interval 10

min-rx-interval 10

process-pst

commit

AThe IP FRR function is enabled for the traffic bound for 193.3.6.0/24 on RT 2. It is unnecessary to configure the ethe4/0/4 interface on RT 2.

BExcept the entry nexthop:106.108.3.1, a backup forwarding entry nexthop:106.108.3.1 is also generated for the traffic bound for 193.3.6.0/24 in the FIB table.

CIf apply backup-interface Ethernet4/0/4 is deleted, the backup forwarding entry can also be generated because apply backup-nexthop 106.108.4.1 takes effect.

DUse a tester to send traffic from FE5 to FE6 after the BFD session becomes Up, run the undo ip address command in the ethe7/0/3 interface view on RT 1, and calculate the time for switchover based on the number of lost packets and packet receiving rate measured by the tester. The switchover takes less than 50 ms.

Correct answer: B, D

Question 2

As shown in the figure, RTA connects to RTB and RTC. A TE tunnel is configured on RTA to reach RTC. The TE tunnel cannot be successfully established. However, CSPFbased path calculation is successful and RTA does not receive any PathErro messages. What are possible causes?

AThe reserved bandwidth is insufficient at interface RTB-2.

BAn interface address on RTB is the same as the address of interface RTA-1.

CRSVP-TE is not configured at interface RTB-2.

DDifferent authentication keys are configured on interfaces RTB-2 and RTC-1.

Correct answer: C, D

Question 3

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?

ARTD receive two external LSAs whose LS_ID is 1.1.1.0

BRTD receive an external LSAs whose LS_ID is 1.1.1.0 and advRouter is 2.2.2.2.

CRTD receive an external LSAs whose LS_ID is 1.1.1.0 and advRouter is 3.3.3.3.

DRTD receive an external LSAs whose LS_ID is 1.1.10/24 based on category 7 LSAs sent by RTA

Correct answer: C

Question 4

An Ethernet cable connects RTA to RTB through Ethernet 0/0.the OSPF neighbor relationship can be established without enabling the OSPF authentication function is enabled, Which of the following statements about the OSPF relationship between RTA and RTB are true?

ASimple authentication is used between RTA and RTB

BThe OSPF neighbor relationship cannot be established between RTA and RTB due to failure of area authentication

CThe OSPF neighbor relationship can be established between RTA and RTB

DMD5 authentication is used between RTA and RTB

Correct answer: C, D

Question 5

As shown in the figure, the asymmetric VLL FRR networking is used. AC

interfaces on PE 1, PE 2, and PE 3 are configured as follows:

Configuration of the AC interface on PE 1:

interface Pos3/0/1link-protocol ppp

undo shutdown

oam detect lcp-terminal notify lcp-terminal

ip address 208.1.1.1 255.255.255.0

ip address 208.2.2.1 255.255.255.0 sub

mpls l2vc pw-template pw1 13579 ip-interworking

mpls l2vc pw-template pw2 24680 ip-interworking secondary

mpls l2vpn oam-mapping

mpls l2vpn reroute immediately resume 0

Configuration of the AC interface on PE 2:

interface Pos1/0/3

link-protocol ppp

undo shutdown

ip address 208.1.1.2 255.255.255.0

mpls l2vc pw-template pw1 13579 ip-interworking

mpls l2vpn oam-mapping

Configuration of the AC interface on PE 3:

interface Pos1/0/0

link-protocol hdlc

undo shutdown

oam detect hello-stop notify hello-stop

ip address 208.2.2.2 255.255.255.0

mpls l2vc pw-template pw1 24680 ip-interworking

mpls l2vpn oam-mapping

Which of the following statements are true on the condition that IGP and MPLS are configured

correctly on the public network?

AThe PW between PE 1 and PE 2 is the primary PW.

BIf a forwarding fault is detected on the PW between PE 1 and PE 2, traffic can be switched to the backup PW on PE 1.

CIf a forwarding fault is detected on the PW between PE 1 and PE 2, traffic from CE 1 to CE 2 can be switched to the PW between PE 1 and PE 3.

DIf a forwarding fault is detected on the public network side of the PW between PE 1 and PE 2, traffic from CE 2 to CE 1 can be switched to the PW between PE 1 and PE 3.

Correct answer: A, B, C

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