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| Section | Weight | Objectives |
|---|---|---|
| Backbone Network Planning | 8% | - Scalability design - Capacity and traffic planning - Architecture design |
| Advanced Routing Protocols | 15% | - OSPF advanced features - Route control and fast convergence - IS-IS advanced features - BGP and MP-BGP |
| IP Mobile Backhaul | 10% | - Service isolation and QoS - 5G/4G backhaul architecture - Synchronization and timing |
| Multicast Protocols | 6% | - PIM-SM/SSM - MSDP and anycast RP - Multicast QoS |
| Automatic O&M | 2% | - Monitoring and analysis - Fault management |
| Network Orchestration & Automation | 2% | - SDN and controller architecture - iMaster NCE overview |
| Tunnel Technologies | 15% | - TE and traffic engineering - MPLS fundamentals - SR-MPLS and SRv6 |
| High Reliability | 8% | - Network redundancy mechanisms - Fault detection and recovery - Fast protection switching |
| Cloud Bearer Network | 8% | - Cloud service bearer requirements - Cloud interconnection architecture - DC interconnect technologies |
| VPN Technologies | 15% | - EVPN and VXLAN - VPN deployment and troubleshooting - MPLS L3VPN |
>> Reliable H35-831 Practice Questions <<
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NEW QUESTION # 18
Which of the following statements are accurate regarding router ID planning in a 5G transport network?
Select all that apply.
Answer: A,B,C,D
Explanation:
Huawei Reference Verification:
Huawei's 5G transport address-planning guidance emphasizes hierarchical reservations, uniqueness, consistent assignment and human-readable operational conventions. Router IDs are 32-bit identifiers that must be unique in the relevant OSPF, BGP or other routing domain. Reserving address capacity per access, aggregation and core level reduces renumbering during expansion. Consecutive router IDs within an aggregation ring and meaningful prefixes simplify device identification, fault correlation and network inventory. All four statements reflect the intended design recommendations, while uniqueness is technically a requirement inside the applicable routing domain rather than a global prohibition across entirely isolated networks.
Technical Deep Dive:
A, B, C and D are correct. The 5G mobile bearer network includes access rings, aggregation layers, and core transport nodes with large numbers of loopback and interconnection addresses. Reserving address pools at each layer makes later growth less disruptive. Consecutive 32-bit router IDs, commonly represented in dotted- decimal notation, simplify monitoring, deployment scripts and operations on the same ring. Unique IDs within the routing domain prevent LSP/LSA or peer identity conflicts. Structured addressing can encode region and network role so engineers infer a device's approximate location and function. Router IDs are often assigned stable loopback-style identifiers independent of individual physical port state. VRP commands
`display ospf brief`, `display isis brief`, `display bgp peer`, and `display ip interface brief` help check identity and address assignment. Meaningful numbering schemes should remain sufficiently flexible to allow expansion rather than becoming overly complex or rigid.
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NEW QUESTION # 19
In SRv6 BE scenarios, the original IPv6 packet encapsulation structure remains unchanged. SRv6 packets continue to be IPv6 packets and can be recognized by common IPv6 devices.
Answer: B
Explanation:
Huawei Reference Verification:
Huawei SRv6 Best Effort uses the native IPv6 forwarding plane. The ingress may place the service SID in an outer IPv6 destination address, and ordinary IPv6-capable P routers forward according to their IPv6 FIB without needing to execute SRv6-specific endpoint behavior. SRv6 BE typically uses shortest-path transport based on IGP reachability rather than explicitly engineered segment lists. The packet remains a valid IPv6 packet that standard IPv6 routers can recognize and carry. This supports A as the intended answer, without implying that SRv6 services never add an outer IPv6 header or optional routing extension.
Technical Deep Dive:
A is TRUE. SRv6 represents forwarding instructions as 128-bit IPv6 SIDs combining a routable locator with an endpoint function and possibly arguments. In Best Effort mode an IPv6 underlay computes reachability to the destination locator; intermediate P routers perform ordinary longest-prefix-match forwarding. The SRv6- capable egress PE recognizes the local service SID and executes its behavior, such as End.DT4 for a customer IPv4 VPN. This compatibility allows gradual introduction of SRv6 services without demanding SID processing on every transit node. It is important not to interpret 'original IPv6 packet structure remains unchanged' as a guarantee of no encapsulation overhead: an outer IPv6 header may be added when carrying VPN traffic, and an SRH may be present in other SRv6 modes. The claim concerns the fundamental use of standard IPv6 forwarding and packet format rather than the absence of additional headers.
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NEW QUESTION # 20
In the OSPFv3 network shown, RTD imports an external route. The AS-External-LSA details are checked on RTG. Based on the following information, what should the Originating Router be?
Exhibit 37.1 - Original topology/configuration figure
Exhibit 37.2 - Original topology/configuration figure
Answer: D
Explanation:
Huawei Reference Verification:
Huawei OSPFv3 defines an AS-External-LSA as a link-state advertisement originated by an ASBR that imports external reachability into the OSPF domain. The LSA's Advertising Router field retains the 32-bit router ID of the originating ASBR as the advertisement is flooded through different areas and received by downstream nodes. RTD imports the prefix 3001:1::/48 and has router ID 4.4.4.4; RTG merely examines the resulting LSDB. The Originating Router is therefore 4.4.4.4, not RTG's router ID or an intermediate router's identifier.
Technical Deep Dive:
A is correct. RTD acts as the OSPFv3 ASBR by executing an IS-IS route import. The external IPv6 prefix is described in an OSPFv3 AS-External-LSA, which is distributed to other areas according to OSPFv3 flooding rules. Although OSPFv3 carries IPv6 routing information, its Router ID remains a 32-bit identifier displayed in dotted-decimal form. RTD's Router ID is 4.4.4.4. RTE (5.5.5.5), RTF (6.6.6.6) and RTG (7.7.7.7) can receive and propagate the LSA but do not replace the advertising router field. The identity is crucial because routers use the ASBR and routing information in the LSDB to calculate how to reach the external destination.
The command `display ospfv3 lsdb external` provides the relevant LSA fields, including the Originating Router and advertised external prefix.
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NEW QUESTION # 21
When synchronizing LSDBs over a P2P network, IS-IS does not need to send CSNPs.
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's IS-IS implementation distinguishes the CSNP behavior on broadcast and point-to-point links. A DIS periodically sends CSNP summaries on broadcast networks, but P2P adjacencies still exchange CSNPs during initial database synchronization. After comparing the received complete list of LSP headers with its own LSDB, a router can use PSNPs to request missing information or acknowledge LSPs. The absence of periodic DIS-based CSNP flooding on P2P links does not mean that CSNPs are never exchanged. Hence the assertion that P2P synchronization does not need CSNPs is false.
Technical Deep Dive:
B is FALSE. IS-IS uses Hellos to establish adjacency, LSPs to disseminate link-state information, and SNPs to compare or request database information. A CSNP provides a complete summary of known LSPs; PSNPs carry partial summaries, requests or acknowledgments depending on link context. On a P2P link, the two routers exchange CSNPs when the adjacency is initially established so they can identify differing LSP content. Missing or stale LSPs are requested or refreshed through the appropriate PSNP and LSP exchange.
P2P links do not elect a DIS and thus lack the periodic DIS behavior seen on multiaccess LANs. But the absence of a DIS is not proof that CSNP is unnecessary at adjacency setup. This is an important exam-key correction: the intended statement is false under Huawei's documented P2P LSDB synchronization procedure.
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NEW QUESTION # 22
In the telco cloud network shown, the underlay uses IS-IS, the overlay uses EVPN to establish VXLAN tunnels, and the service layer uses BGP to advertise service routes. To ensure normal service-layer route advertisement, a static route to the VNF loopback interface is configured on the leaf node and imported into a routing protocol. In the recommended telco cloud network solution, what is the next hop of the route learned by the DC GW?
Exhibit 17.1 - Original topology/configuration figure
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's telco-cloud architecture combines IS-IS underlay reachability, EVPN VXLAN overlay transport, and BGP service-route advertisement. A leaf providing L2/L3 gateway functionality imports a static VNF loopback route and advertises its reachability through the relevant overlay/IP-prefix mechanism. The DC GW resolves the learned service destination using the advertising leaf's VTEP/loopback address as the transport next hop. The VNF's loopback is the service destination, not the underlay transport next hop; the spine is transit infrastructure. Therefore the expected next hop is the leaf node's loopback.
Technical Deep Dive:
C is correct. IS-IS advertises infrastructure addresses, including VTEP loopbacks, across the spine-leaf underlay. BGP EVPN distributes overlay reachability, and service BGP propagates VNF-related prefixes. The leaf has a static route to a VNF loopback and imports it into its routing control plane. The leaf advertises the prefix to the DC GW using an EVPN IP-prefix route or the applicable service-layer advertisement. The receiving DC GW resolves this route through the leaf's loopback/VTEP, which in turn resolves through IS-IS and the VXLAN transport path. Spine devices are transit next hops for the underlay, not the BGP service- route endpoint. The VNF loopback identifies what traffic is intended to reach; it does not provide the transport tunnel endpoint. On supported forwarding hardware, route recursion, encapsulation and ECMP transport selection are implemented using installed next-hop groups.
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NEW QUESTION # 23
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