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| Section | Objectives |
|---|---|
| Topic 1: IPv6 and Network Services | - IPv6 routing technologies
|
| Topic 2: Network Design and Troubleshooting | - Enterprise network design
|
| Topic 3: BGP and Internet Routing | - Advanced BGP features
|
| Topic 4: Advanced Routing Protocols | - IS-IS Routing Protocol
|
| Topic 5: MPLS and VPN Technologies | - MPLS fundamentals
|
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NEW QUESTION # 107
During the process of viewing the debug input through the SSH terminal, there is a lot of pop-up information. Which of the following operations can make the monitor terminal no longer pop up the debug message?
Answer: B,D
NEW QUESTION # 108
On the 05PFv3 network shown in the figure, each interface of R1 and R2 has two IPv6 addresses. Although the IPv6 address prefixes of R1 and R2 are different, they can still be used to establish an OSPFv3 neighbor relationship. If R2 is the DR, the Intra-Area-Prefix-LSA generated by R2 contains four prefixes.
Answer: B
NEW QUESTION # 109
Which of the following is not added for IS-IS to support IPv6 route processing and calculation?
The source IP address of IS-IS Hello packets is changed to the link-local address.
TLV 232, which is equivalent to the IP Interface Address TLV in IPv4, except that the original 32-bit IPv4 address is changed to a 128-bit IPv6 address.
Answer: A
Explanation:
The option lettering in the supplied question is malformed. In the standard option order, the source-IP statement is option B, and it is the item that was not added for IS-IS IPv6.
Unlike OSPFv3, IS-IS operates directly over the data-link layer rather than being encapsulated in IPv4 or IPv6. Consequently, an IS-IS Hello PDU does not have an IP header or an IP source address that could be changed to an IPv6 link-local address.
To support IPv6 route processing, IS-IS was extended with the following information:
* TLV 232 - IPv6 Interface Address: Carries one or more 128-bit IPv6 interface addresses.
* TLV 236 - IPv6 Reachability: Carries IPv6 prefixes, metrics and reachability attributes.
* IPv6 NLPID: The value 142 (0x8E) identifies IPv6 as a supported network-layer protocol and is carried when IPv6 reachability is advertised.
Therefore, TLV 232, TLV 236 and the IPv6 NLPID are valid IS-IS IPv6 extensions. Changing an IS-IS Hello packet's source IP address is not one of them. Huawei IS-IS documentation
NEW QUESTION # 110
On the IS-IS IPv6 network shown in the figure:
* Multi-topology is enabled on all routers.
* The IPv6 address of Loopback0 on R4 is 2000::4/128.
* The command ipv6 summary 2000::/64 level-2 is configured in the IS-IS processes of R2 and R1.
* The command ipv6 import-route isis level-2 into level-1 is configured in the IS-IS processes of R1, R2, and R3.
Which of the following routers have the route 2000::/64 in their routing tables?
Answer: B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the IS-IS Network and IPv6 Route Summary Behavior
* IS-IS Areas and Router Roles:
* Area 49.0001 (Level-1-2): R1, R2, R4
* Area 49.0002 (Level-1-2 & Level-1): R3 (Level-1-2), R5 (Level-1 only)
* Effect of ipv6 summary 2000::/64 level-2 Command
* This command on R1 and R2 summarizes the 2000::/64 prefix for Level-2 routers.
* Instead of advertising the detailed 2000::4/128 prefix, R1 and R2 advertise only the summarized
2000::/64 route to other Level-2 routers.
* Effect of ipv6 import-route isis level-2 into level-1 Command
* This command allows Level-1 routers (like R3) to learn Level-2 routes (like 2000::/64).
* R1 and R2 redistribute the 2000::/64 summary route into Level-1 IS-IS areas, making it available to Level-1 routers.
Route Distribution Analysis for Each Router
R4 (Does Not Have 2000::/64) #
* R4 only advertises its Loopback0 (2000::4/128).
* It does not need to install the summarized 2000::/64 route, as it originates from its own loopback.
# R4 does NOT have the 2000::/64 route.
R5 (Does Not Have 2000::/64) #
* R5 is a Level-1-only router in Area 49.0002.
* It does not have a Level-2 connection to learn the summarized 2000::/64 route.
* Because R5 is Level-1 only, it can only receive routes if a default route is provided, which is not mentioned in the question.
# R5 does NOT have the 2000::/64 route.
R3 (Has 2000::/64) #
* R3 is a Level-1-2 router, meaning it can learn both Level-1 and Level-2 routes.
* Since R1 and R2 advertise the summarized 2000::/64 route into Level-2 and R3 has ipv6 import-route isis level-2 into level-1, R3 will install 2000::/64 in its routing table.
# R3 has the 2000::/64 route.
R2 (Has 2000::/64) #
* R2 is a Level-1-2 router and has the ipv6 summary 2000::/64 level-2 command enabled.
* This means R2 advertises the summarized 2000::/64 route to other Level-2 routers and installs it in its own routing table.
# R2 has the 2000::/64 route.
Final Conclusion:
# R3 has the route 2000::/64.
# R2 has the route 2000::/64.
# R4 does NOT have the route 2000::/64.
# R5 does NOT have the route 2000::/64.
Thus, the correct answers are: C. R3, D. R2.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IS-IS Route Summarization and IPv6 Multi-Topology Huawei Official HCIP-Datacom Study Guide - IS-IS L1/L2 Routing and IPv6 Summarization Commands Huawei Documentation on IPv6 Route Summary Behavior in IS-IS
NEW QUESTION # 111
From this picture, we can judge
Answer: A
NEW QUESTION # 112
......
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