In BGP, Notification messages are used to request peers to resend routing information after routing policies are changed.
Answer(s): B
Notification Message PurposeBGP Notification messages are used to report errors or terminate a connection. They do not request peers to resend routing information after routing policies are changed.Routing updates following policy changes require manual resynchronization, not Notification messages.HCIP-Datacom-Core ReferenceThe purpose and usage of Notification messages are discussed in the BGP operation chapters.
When a BGP device sends an Open message to establish a peer connection, which of the following information is carried?
Answer(s): A,B,D
BGP Open Message ComponentsThe Open message contains the following critical parameters:Local AS Number: The autonomous system of the router.Router ID: A unique identifier for the router.Hold Time: The maximum time the router will wait for Keepalive or other messages from its peer.Incorrect OptionC . NLRI: Network Layer Reachability Information is not included in Open messages; it is carried in Update messages.HCIP-Datacom-Core ReferenceThe structure and contents of Open messages are explained in BGP protocol details.
During BGP route summarization configuration, which keyword can be used to suppress all specific routes so that only the summary route is advertised?
Answer(s): D
In BGP route summarization, the suppress-spec-map keyword is used to suppress all specific routes so that only the summary route is advertised. This helps reduce routing table size and improve efficiency. The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes, ensuring that unnecessary details are hidden from other parts of the network while still maintaining connectivity.
HCIP-Datacom-Core Technology Training Material (BGP Route Summarization).Suppressing Specific Routes:When summarizing routes, the suppress-spec-map keyword is used to suppress specific prefixes so that only the summarized route is advertised.The suppressed routes are not advertised to BGP peers; instead, only the summary route is propagated.HCIP-Datacom Advanced Routing & Switching Technology (BGP Attributes and Summarization Techniques).Atomic-Aggregate Attribute:The summary route generated during BGP route summarization carries the Atomic-aggregate attribute. This attribute indicates that the summary route might not provide the exact path information available in the original specific routes.Additionally, when using the suppress-spec-map option, the specific routes' attributes, such as community attributes, are not included in the summary route.HCIP-Datacom-Core Technology Training Material (BGP Path Attributes).Conclusion:The suppress-spec-map keyword is used to suppress specific routes when performing BGP summarization. The summarized route includes the Atomic-aggregate attribute but does not carry community attributes from the suppressed routes.
BGP is generally applied to complex networks where routes change frequently. Frequent route flapping consumes a large number of bandwidth and CPU resources, and even affects the normal operation of the network. This is an unavoidable problem that cannot be solved in BGP.
BGP Route Flapping and MitigationWhile route flapping is a concern in large-scale networks, BGP employs mechanisms such as Route Dampening to mitigate its impact. Route dampening suppresses frequently flapping routes for a period of time to reduce resource consumption and network instability.Therefore, it is incorrect to state that the issue cannot be resolved in BGP.HCIP-Datacom-Core ReferenceThe mechanism of route dampening is detailed in the BGP optimization chapters.
The Next_Hop attribute in BGP records the next hop of a route. Similar to the next hop in an IGP, the Next_Hop attribute in BGP must be the IP address of a peer interface.
BGP Next_Hop AttributeUnlike IGP, the Next_Hop attribute in BGP does not necessarily have to be the IP address of a peer interface. For example, in multi-hop BGP configurations, the Next_Hop can point to a different router or interface within the network.HCIP-Datacom-Core ReferenceDetails of the Next_Hop attribute and its behavior are outlined in BGP path selection principles.
Share your comments for Huawei H12-821_V1.0 exam with other users:
nice practice dumps
nokia 4a0-114 dumps
great content and wonderful to have the answers with explanation
for question #118, the answer is option c. the screen shot is showing the drop down, but the answer is marked incorrectly please update . thanks for sharing such nice questions.
the correct answer for the question 29 is d.
question no 22: correct answers: bc, 1 per session 1 per page 1 per component always
these are pretty useful
awesome
yes please upload
great job whoever put this together, for the greater good! thanks!
just started to view all questions for the exam
helpful material
hope for the best
will post exam has finished
really correct and good analyze!
excellent thanks a lot
will post once pass the cka exam
good content
q:32 answer has to be option c
nice questions
i really like the support team in this website. they are fast in communication and very helpful.
a good contemporary exam review
q23, its an array, isnt it? starts with [ and end with ]. its an array of objects, not object.
cool very helpfull
i just passed. this exam dumps is the same one from prepaway and examcollection. it has all the real test questions.
is this a valid prince2 practitioner dumps?
all are relatable questions
might help me to prepare for the exam
just paid and downlaod the 2 exams using the 50% sale discount. so far i was able to download the pdf and the test engine. all looks good.
i think it should be a,c. option d goes against the principle of building anything custom unless there are no work arounds available
very legible
is this exam accurate or helpful?
please upload dump, i have exam in 2 days
this is useful