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| Section | Objectives |
|---|---|
| Topic 1: Enterprise Network Architecture | - Network design principles
|
| Topic 2: Data Center and Virtualization Technologies | - VXLAN and overlay networks
|
| Topic 3: IPv6 and Advanced IP Technologies | - IPv6 deployment
|
| Topic 4: Network Automation and Programmability | - SDN and automation
|
| Topic 5: WAN and VPN Technologies | - MPLS fundamentals
|
| Topic 6: Routing and Switching Technologies | - Switching technologies
|
| Topic 7: Network Security and QoS | - QoS mechanisms
|
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NEW QUESTION # 214
An engineer needs to download the configuration file vrpcfg.cfg to a local device through SFTP, rename the configuration file to backup.cfg, and upload it to the default directory of the device.
The configuration file is located at /vrpcfg.cfg (default directory of the remote device), and the local directory is C:\.
Which of the following Python Paramiko code lines can implement the required operations?
Answer: C
Explanation:
Comprehensive and Detailed
✔ The correct sequence of operations:
Download the file from remote device (/vrpcfg.cfg) → Store as C:\backup.cfg.
Upload the renamed file (backup.cfg) back to the remote device.
✔ Breaking Down the Correct Option (B):
✅ sftp.get('/vrpcfg.cfg', r'C:\backup.cfg') → Downloads vrpcfg.cfg from the remote device and renames it backup.cfg in C:\.
✅ sftp.put(r'C:\backup.cfg', '/') → Uploads backup.cfg back to the remote device.
📖 Reference: Huawei HCIE Datacom - Python SFTP File Transfer Using Paramiko
NEW QUESTION # 215
Which of the following commands is used to adjust the cost of an IS-IS interface?
Answer: D
Explanation:
In Intermediate System to Intermediate System (IS-IS), the cost (metric) determines the preferred routing path. The cost is assigned to each interface, and IS-IS uses the shortest path (lowest cost) to reach a destination.
The correct command to manually modify the IS-IS interface cost is:
kotlin
CopyEdit
interface GigabitEthernet 0/0/1
isis enable 1
isis cost <value>
Where <value> represents the manually configured cost of the interface.
Incorrect Options:
* A. isis circuit-type - Used to define the circuit type (Level-1, Level-2, or both), but does not affect cost. #
* B. isis timer hello - Modifies the hello interval for IS-IS neighbors but does not change cost. #
* C. isis circuit-level - Not a valid IS-IS configuration command. #
Reference from Huawei HCIE-Datacom Documentation:
* HCIE-Datacom Certification Guide - IS-IS Protocol Configuration
* Huawei Command Reference for IS-IS
* Huawei Routing & Switching Training Manual - IS-IS Cost Metric Adjustment
NEW QUESTION # 216
Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size
Answer: A
NEW QUESTION # 217
Which of the following statements about BGP EVPN principles are correct in a scenario where a VXLAN tunnel is dynamically established through BGP EVPN?
Answer: B,C,D
Explanation:
BGP EVPN in VXLAN Tunneling
✅ A. MP_REACH_NLRI is used to carry routing information.
MP_REACH_NLRI (Multiprotocol Reachable Network Layer Reachability Information) is used in BGP updates to carry VXLAN reachability information.
✅ B. Several BGP EVPN routes are defined through BGP extension.
BGP EVPN introduces multiple route types, such as Type 2 (MAC/IP Advertisement), Type 3 (Inclusive Multicast), and Type 5 (IP Prefix Advertisement).
✅ D. MP_REACH_NLRI is used to carry the RT.
RT (Route Target) defines route import/export policies in VPN environments.
MP_REACH_NLRI carries the RT attribute in BGP EVPN updates.
❌ C. MP_REACH_NLRI is used to carry the RD.
Wrong! The Route Distinguisher (RD) is carried inside BGP attributes, but not in MP_REACH_NLRI.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN BGP EVPN Configuration Guide - BGP EVPN Route Types
HCIE-Datacom Training Material - VXLAN Dynamic Tunnel Establishment
NEW QUESTION # 218
As shown in the figure, when PE1 receives an ARP request packet, it forwards the packet to PE4. The packet then carries two labels. The label value 201 is carried by the EVPN Type ____ route. (Enter only digits.)
Answer:
Explanation:
3
Explanation:
Understanding EVPN (Ethernet VPN) Label Allocation and ARP Handling
#What Happens in This Scenario?
1##CE1 (192.168.1.1) sends an ARP request to discover the MAC address of CE2 (192.168.1.2).
2##PE1 receives the ARP request and needs to forward it over the EVPN fabric.
3##To send the broadcast ARP request across the EVPN network, PE1 forwards the packet to PE4 using BUM (Broadcast, Unknown unicast, and Multicast) forwarding.
4##PE4, as the Designated Forwarder (DF), forwards the ARP request to CE2.
Role of Labels in EVPN VXLAN/MPLS Networks
#EVPN uses BGP to distribute MAC/IP reachability information using different route types.
#EVPN Type 2 Route (MAC/IP Advertisement Route):
Used forMAC-to-IP address mappingannouncements.
Ensuresremote VTEPs (PE routers) learn MAC-to-IP bindingsdynamically.
#EVPN Type 3 Route (Inclusive Multicast Route):
Used forBUM traffic (Broadcast, Unknown Unicast, Multicast).
Assigns a multicast label (e.g., 201) to be used for forwarding broadcast packets like ARP requests.
#In this case:
Thelabel 201is used forBUM traffic forwarding.
BUM traffic is handled using an EVPN Type 3 route.
Why is the Answer 3?
#EVPN Type 3 routes carry labels for BUM traffic, which includes ARP requests.
#Label 201 is used for multicast distribution, which is managed by Type 3 routes.
Real-World Application:
VXLAN Data Centers:UsesEVPN Type 3 routes to control BUM traffic efficiently.
Campus Networks:Preventsunnecessary flooding of ARP requests across VXLAN domains.
#Reference:Huawei HCIE-Datacom Guide - EVPN BGP Route Types and Multicast Labeling
NEW QUESTION # 219
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