On an IS-IS network, each router can generate LSPs. Which of the following events trigger the generation of a new LSP?
Answer(s): A,B,D
LSP Generation in IS-ISIS-IS routers generate new Link State Packets (LSPs) under the following conditions:Interface Status Changes: When IS-IS interfaces go up or down, the link state changes, triggering LSP updates.Periodic Updates: IS-IS periodically regenerates LSPs to ensure link-state information remains synchronized across the network.Interface Metric Changes: Any modification to interface costs results in a new LSP to reflect the updated cost in the network.Incorrect OptionC . Inter-area IP routes change is incorrect because IS-IS does not inherently differentiate between areas for LSP generation.HCIP-Datacom-Core ReferenceIS-IS LSP generation rules are detailed in the IS-IS configuration and implementation chapters.
Similar to the OSPF DR, the IS-IS DIS needs to be elected on a broadcast network. However, the OSPF DR is preemptive by default, whereas the IS-IS DIS is not preemptive by default.
Answer(s): A
DIS and DR ElectionThe IS-IS Designated Intermediate System (DIS) is responsible for generating and updating pseudonode LSPs on a broadcast network.Unlike OSPF DR, the IS-IS DIS does not preempt by default. This behavior avoids unnecessary flapping in the network due to frequent DIS re-elections.HCIP-Datacom-Core ReferenceThe characteristics of DIS and DR behavior are explained in IS-IS network operation chapters.
On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level-1 LSPs and Level-2 LSPs and have the same format. Which of the following parts constitute the LSP ID in an LSP?
Answer(s): A,B,C
IS-IS Overview: Intermediate System to Intermediate System (IS-IS) is a link-state routing protocol. Routers exchange Link State Packets (LSPs) to maintain a synchronized link-state database. These LSPs are categorized into Level-1 LSPs (intra-area routing) and Level-2 LSPs (inter-area routing). Both types share the same packet format.
HCIP-Datacom-Core Technology Training Material (IS-IS LSPs and Packet Structure).LSP ID Format: The LSP ID uniquely identifies each LSP and ensures accurate routing information. It comprises the following components:System ID (C): A 6-byte identifier assigned to each router, derived from the router's NET (Network Entity Title). This identifier ensures unique identification of routers within the IS-IS domain.Pseudonode ID (B): Assigned when a router acts as a Designated Intermediate System (DIS) on a broadcast network. It differentiates LSPs generated by the DIS from other routers.LSP Number (A): A 1-byte field indicating the sequence number of the LSP. It helps distinguish multiple LSPs generated by the same router for the same level.HCIP-Datacom Advanced Routing & Switching Technology (IS-IS LSP Format).IS Type Exclusion:IS Type (D) is not part of the LSP ID itself. It is a field within the IS-IS PDU that indicates the type of Intermediate System (Level-1, Level-2, or both) but does not contribute to the composition of the LSP ID.HCIE-Datacom V1.0 Training Material (IS-IS Basics and Levels).Conclusion: The LSP ID in IS-IS consists of System ID, Pseudonode ID, and LSP Number. These components uniquely identify each LSP within the IS-IS domain.
On an OSPF network, interfaces are classified into four types based on link layer protocols. Which of the following types can interfaces on an IS-IS network be classified into based on physical links?
Answer(s): A,B
IS-IS Interface TypesIS-IS interfaces are categorized based on physical link characteristics:Point-to-Point (P2P): Direct connections between two routers.Broadcast: Shared medium networks where multiple routers communicate.Incorrect OptionsC . P2MP and D. NBMA are not standard interface classifications in IS-IS.HCIP-Datacom-Core ReferenceIS-IS physical link classifications are elaborated in IS-IS link configuration sections.
Post your Comments and Discuss Huawei H12-821_V1.0 exam with other Community members:
MM Commented on February 27, 2025 is there anyone who wrote and pass using this dump? SOUTH AFRICA
Thych Commented on December 01, 2024 Is this still valid? Anonymous
Alex Commented on March 26, 2024 Hope to pass CHINA
Fetene Commented on January 24, 2024 Good things Anonymous
Makvi Commented on October 01, 2023 hello dears LIBYAN ARAB JAMAHIRIYA
Dominic Commented on June 18, 2023 Just to let anyone taking this exam know... the exam is fucking hard. You cannot pass this exam without using exam dumps. CANADA
Eliot Mokoena Commented on May 08, 2023 bought questions hope i will pass SOUTH AFRICA
Our website is free, but we have to fight against bots and content theft. We're sorry for the inconvenience caused by these security measures. You can access the rest of the H12-821_V1.0 content, but please register or login to continue.