Huawei H31-161 Actual Free Exam Questions & Community Discussion

Which statement about the Ethernet clock synchronization technology used in actual solutions is true?

In MPLS QoS, traffic policies are developed based on simple traffic classification and complex traffic classification. In traffic policies based on simple traffic classification, the service class, color, and drop priority of packets are reset based on the tags in packets. In traffic policies based on complex traffic classification, measures such as traffic policing, priority re-marking, packet filtering, policybased routing, and traffic sampling are implemented based on the traffic type. Generally, simple traffic classification is applied on border routers in DiffServ domains, and complex traffic classification core routers. QoS traffic policies are configured by performing the following operations:
1. Defines DiffServ domains and configuring a traffic policy.
2. Classifies traffic.
3. Defines traffic behaviors and configures characteristics of behaviors.
4. Defines a traffic policy and specifies actions for traffic categories.
5. Applies the traffic policy.
6. Configures L-LSP.
7. Configures reverse address check.
8. Adds interfaces to the DiffServ domains.
Which of the preceding operations are required when you configure simple traffic classification?

Exhibit:

As shown in the figure, the AS number of operator 1 is 100 and that of
operator 2 is 200. Option C is used for exchanging VPN routes between AS 100 and AS 200. Which of the following statements about Option C are true?

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

BGP often uses AS PATH to control inter-area routes. Which of the following regular expressions helps ensure that routes within AS 100 and neighboring ASs are received from only one EBGP neighbor?

Which of the following statements about the working principle of LDP FRR are true?

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?

Which of the following statements describe the reliability requirements of the voice service for the IP bearer network?

As shown in the figure, the mapping between links and administrative groups is as follows:
0x0F for A -> B; 0xFF for B -> C; 0xF0 for A -> C; 0xC3 for B -> D; and 0x3C for C -> D.
It is expected to configure a tunnel (affinity: 0x0C; mask: 0xFF) on node A to connect to RTD. Which path will be created along with the tunnel?

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 EBGP.Add two entries to the routing table of the VRF on PE 1:
VRF1 RD 100:1, IRT 1:1, ERT 2:2VRF2 RD 100:2, IRT 1:1, 2:2, ERT 2:2, 3:3 Add two entries to the routing table of the VRF on PE 2:
VRF1 RD 100:1, IRT 1:1, ERT 2:2
VRF2 RD 100:2, IRT 2:2, ERT 1:1
Import a valid static route 1.1.1.1/32 on CE 1. Suppose CE 2, CE 3, and CE 4 do not have route 1.1.1.1/32 in the local routing table. Which of the following routers have route 1.1.1.1/32 in the unicast routing table?

Refer to the exhibit.

Which statement about Hub & Spoke MPLS VPN is false?
A . If two Spoke sites are connected to the same Spoke PE, they must be assigned to different VPN instances to prevent them from exchanging routing information.
B . The route of traffic from Spoke site 1 to Hub site 2: Traffic enters Hub site 3 through an interface under VPN1-Hub of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Spoke of the Hub PE.
C . The route of traffic from Spoke site 2 to Hub site 1: Traffic enters Hub site 3 through an interface under VPN1-Spoke of the Hub PE and is then forwarded to Spoke site 2 through an interface under VPN1-Hub of the Hub PE.
D . The Hub PE can advertise aggregate Spoke site routes or default routes to Spoke PEs through VPNv4.
E .Routes advertised by a Spoke PE to Spoke site 1 of the Hub PE may be advertised back by the Hub PE through a VPNv4 neighbor.
Configure VRFs and relevant policies on a PE as follows:
#
ip vpn-instance vrf1
route-distinguisher 100:1
export route-policy vrf1
vpn-target 1:1 export-extcommunity
vpn-target 2:2 import-extcommunity
ip vpn-instance vrf2
route-distinguisher 100:2
import route-policy vrf2
vpn-target 1:1 3:3 export-extcommunity
vpn-target 1:1 3:3 import-extcommunity
ip vpn-instance vrf3
route-distinguisher 100:3
import route-policy vrf3
vpn-target 2:2 3:3 export-extcommunityvpn-target 2:2 3:3 import-extcommunity ip vpn-instance vrf4 route-distinguisher 100:4 import route-policy vrf4 vpn-target 1:1 export-extcommunity vpn-target 2:2 import-extcommunity
#
route-policy vrf2 deny node 1
if-match extcommunity-filter 1
#
route-policy vrf2 permit node 2
#
route-policy vrf1 permit node 1
apply extcommunity rt 3:3 additive
#
route-policy vrf3 permit node 1
if-match extcommunity-filter 2
#
route-policy vrf4 permit node 1
if-match extcommunity-filter 3
#
ip extcommunity-filter 1 permit rt 2:2
ip extcommunity-filter 2 deny rt 1:1
ip extcommunity-filter 3 permit rt 3:3
#
If a route is imported to the routing table of VRF 1, which VRF can the route match?(A)

RTA is a leaf router that directly connects to host A through interface GigabitEthernet 1/0/0. The interface is configured as follows:
interface Ethernet1/0/0
undo shutdown
ip address 192.168.4.2 255.255.255.0
pim sm
igmp enable
igmp version 3
igmp ssm-mapping enable
Configurations in the IGMP view are as follows:
igmp
ssm-mapping 233.1.1.0 255.255.255.0 10.10.1.1
A user sends an IGMPv2 Report message on host A to join groups 232.1.1.1 and 233.1.1.1 but the user cannot receive (10.10.1.1, 232.1.1.1) and (10.10.1.1, 233.1.1.1) messages. To solve this problem, which of the following configurations are required?

Configure VRFs and relevant policies on a PE as follows:

If a route is imported to the routing table of VRF 1, which VRF can the route match?