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Huawei H35-831 exam is a challenging exam that requires extensive preparation and study. Candidates are advised to have a solid understanding of the latest industry trends, technologies, and products, as well as a deep understanding of the principles and concepts of data communication and carrier networks. Candidates are also advised to have hands-on experience designing and implementing complex data communication and carrier networks, as this will help them to better understand the exam questions and scenarios.
Huawei H35-831 (HCIE-Datacom-Carrier (Written) V1.0) certification exam is an essential certification for professionals who specialize in data communication in the carrier network field. Passing H35-831 exam demonstrates one's expertise in data communication technologies and their applications and is highly valued in the industry. Professionals who hold this certification have a competitive advantage in the job market and are recognized globally for their skills and knowledge.
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Huawei H35-831 (HCIE-Datacom-Carrier (Written) V1.0) Exam is a professional-level certification exam designed for candidates who have a deep understanding of data communication and carrier network technologies. H35-831 Exam is conducted by Huawei, a leading global provider of information and communications technology (ICT) infrastructure and smart devices.
NEW QUESTION # 20
When synchronizing LSDBs over a P2P network, IS-IS does not need to send CSNPs.
Answer: B
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 # 21
Which of the following statements are accurate about the SR Policy configuration shown?
Exhibit 33.1 - Original topology/configuration figure
Select all that apply.
Answer: B,C,D
Explanation:
Exact Extract - Huawei Training Material (Automatic SDN Network O & M, p.19):
"SR-MPLS TE Policy is a new tunnel diversion technology developed based on SR. An SR-MPLS TE policy consists of the following three parts: Ingress, Color, and End point. Color indicates the extended community attribute carried in the SR-MPLS TE Policy. End point specifies the destination address of the SR-MPLS TE Policy." Huawei Reference Verification:
Huawei SR-MPLS TE Policy architecture identifies an ingress, a Color Extended Community and an endpoint. Eligible BGP VPN routes can be steered to a policy when the route's BGP next hop matches the policy endpoint and its Color Extended Community matches the policy color. Candidate paths are ordered by preference, and the highest valid preference determines the active path. In the exhibit CP2 has preference 200, while CP1 has 100, so CP2 is active. The color can be transmitted as a BGP route attribute. Traffic's destination address alone is not the matching criterion for automatic color-based recursion. Thus A, C and D are correct.
Technical Deep Dive:
A, C and D are correct. The SR Policy has Color Green, Endpoint 3.3.3.3 and Binding SID 30028. CP1 carries labels 20004 and 20003 with preference 100, whereas CP2 carries 20006 and 20005 with preference
200. CP2 wins when valid because its preference is greater. A BGP service route carrying Green as its Color Extended Community and 3.3.3.3 as its next hop can recurse to that policy. The packet's own final destination may be a customer prefix unrelated to 3.3.3.3; the routing recursion matches the BGP next hop and color. The BSID identifies the policy and abstracts its current active segment list. Huawei's forwarding plane translates the selected list into the required MPLS label operations and forwards packets accordingly. Distinguishing route next hop from packet destination avoids the incorrect answer B.
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NEW QUESTION # 22
In the transport network shown, two-level RRs are deployed, and RTA has the directly connected network segment 10.1.1.0/30. Which of the following statements about the BGP deployment solution are incorrect?
Exhibit 28.1 - Original topology/configuration figure
Answer: D
Explanation:
Huawei Reference Verification:
Huawei's hierarchical BGP route-reflector deployment lets a lower-level RR be a client of an RR at a higher level, extending route distribution without requiring client-to-client full-mesh sessions. Redundant RRs serving the same cluster can use the same cluster ID. Ordinary edge clients can peer with their selected Level-
1 RRs and learn reflected routes without peering with one another. RRs on the same tier do not have to be configured as each other's route-reflector clients; non-client IBGP relationships or other hierarchy rules can supply the required connectivity. Therefore the assertion that same-level RRs must be each other's clients is incorrect.
Technical Deep Dive:
C is incorrect. In the illustrated two-level design, RTA and RTB each peer with the redundant Level-1 RRs; Level-2 RRs operate as clients of the Level-1 layer to receive the needed routes. A direct IBGP adjacency between RTA and RTB is not mandatory because both can learn eligible routes through their RRs. RRs in a shared redundancy cluster may use the same cluster identifier for consistent loop detection, but this is not a universal rule across unrelated clusters. Route-reflection client relationships are directional configuration properties: not all RRs at one level need to treat their peer RRs as clients. RRs may establish ordinary non- client peering where appropriate. The BGP Originator ID and Cluster List attributes prevent reflection loops as routes pass through the hierarchy. Route deployment must also consider route visibility and path diversity; making every same-tier RR a mutual client is neither necessary nor a normal scaling principle.
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NEW QUESTION # 23
SR and LDP interworking technology allows SR and LDP to operate together on the same network. SR and LDP networks can be interconnected through this technology to implement MPLS forwarding. To interwork with an LDP network, an SR network needs a particular device type to advertise SIDs on behalf of SR- incapable LDP devices. What is this device called?
Answer: D
Explanation:
Huawei Reference Verification:
Huawei's SR/LDP interworking design defines a mapping server as an SR-capable node that advertises Prefix- to-SID mappings on behalf of LDP nodes that cannot originate Segment Routing advertisements. A mapping client receives this information and can use the assigned SID to calculate SR paths toward destinations otherwise reachable through the LDP domain. Border or interworking routers can connect SR and LDP transport segments to provide continuity during gradual migration. The mapping server originates the advertisements; a mapping client consumes them. Therefore D is correct.
Technical Deep Dive:
D is correct. SR-MPLS distributes Prefix-SIDs through IGP extensions, whereas traditional LDP distributes label bindings using LDP sessions. An LDP-only router cannot advertise a valid SR Prefix-SID directly. The mapping server bridges this information gap by announcing a configured prefix-to-SID association for the SR- incapable node. SR-capable mapping clients learn the association and can build a label stack toward that destination. The interworking boundary performs the MPLS operations required to connect the SR and LDP forwarding segments. A representative OSPF-based Huawei configuration includes `segment-routing`,
`mapping-server prefix-sid-mapping 10.10.10.10 32 100`, and in the OSPF process `segment-routing mapping- server send` where supported. Mapping server versus mapping client is a producer/consumer distinction: the server advertises the prefix mappings, and the client receives and uses them. The feature permits phased modernization of large carrier networks without replacing all LDP devices at once.
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NEW QUESTION # 24
In the inter-AS VPN Option B network shown, Site1 and Site2 can communicate. CE1 has a route to 10.1.1.1
/24, and CE2 has learned that route. PE1, ASBR1, and ASBR2 assign VPN labels 15360, 15361, and 15362, respectively, to the route. In addition, PE1 and ASBR2 assign public-network label 3 to their own loopback interface addresses. For packets sent from CE2 to 10.1.1.1, which label pushed by PE2 is the innermost label?
Exhibit 46.1 - Original topology/configuration figure
Answer: C
Explanation:
Huawei Reference Verification:
Huawei inter-AS MPLS VPN Option B uses MP-EBGP labeled VPN route exchange between ASBRs. As VPN routes are readvertised through the inter-AS boundary, each ASBR may allocate its own VPN label. A local PE uses the VPN label advertised by the BGP next hop from which it learned the route. In the provided scenario ASBR2 allocates label 15362 for the destination and advertises it to PE2. Hence the innermost VPN label pushed by PE2 is 15362; the other labels relate to the remote PE and the preceding ASBR, while label 3 denotes implicit null transport behavior.
Technical Deep Dive:
A is correct. The VPN route to 10.1.1.1/24 is originated at PE1 in AS1, propagated through ASBR1, exchanged with ASBR2 in AS2, and finally advertised to PE2. PE1 allocates VPN label 15360, ASBR1
15361 and ASBR2 15362. PE2's immediate BGP next hop for the VPN route is ASBR2, so it pushes VPN label 15362 as the innermost label. A separate transport label may be pushed outside the VPN label to reach ASBR2. Label value 3 is MPLS implicit null: it is normally advertised to request penultimate-hop popping rather than appearing on the wire as an actual stacked label. In Option B, border routers terminate or swap labeled VPN forwarding contexts across the AS boundary; labels do not remain unchanged from the originating PE across every border.
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NEW QUESTION # 25
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