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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Data Center, Professional (JNCIP-DC) Exam |
| Exam Number: | JN0-683 |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Exam Format: | Scenario-based, Multiple choice |
| Real Exam Qty: | 65 |
| Related Certifications: | JNCIE-DC JNCIA-DC JNCIS-DC |
| Exam Price: | $400 USD |
| Certificate Validity Period: | 3 years |
| Passing Score: | Variable (approx. 65%-70%) |
| Recommended Training: | Juniper Learning Portal |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-683 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers |
| Pre Condition: | Valid JNCIS-DC or JNCIS-ENT certification |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/data-center/jncip-dc.html |
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NEW QUESTION # 80
You are deploying an IP fabric using EBGP and notice that your leaf devices areadvertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)
Answer: A,B
Explanation:
* Issue Overview:
* The leaf devices in an IP fabric using eBGP are advertising and receiving all routes, but the routes are not being installed in the routing table and are marked as hidden. Thistypically indicates an issue with the BGP configuration, particularly with next-hop handling or AS path concerns.
* Corrective Actions:
* B. You need to configure a next-hop self policy:This action ensures that the leaf devices modify the next-hop attribute to their own IP address before advertising routes to their peers. This is particularly important in eBGP setups where the next-hop may not be directly reachable by other peers.
* D. You need to configure multipath multiple-as:This setting allows the router to accept multiple paths from different autonomous systems (ASes) and use them for load balancing.
Without this, the BGP process might consider only one path and mark others as hidden.
* Incorrect Statements:
* A. You need to configure as-override:AS-override is used to replace the AS number in the AS- path attribute to prevent loop detection issues in MPLS VPNs, not in a typical eBGP IP fabric setup.
* C. You need to configure loops 2:There is no specific BGP command loops 2 relevant to resolving hidden routes in this context. It might be confused with allowas-in, which is used to allow AS path loops under certain conditions.
Data Center References:
* Proper BGP configuration is crucial in IP fabrics to ensure route propagation and to prevent routes from being marked as hidden. Configuration parameters like next-hop self and multipath multiple-as are common solutions to ensure optimal route installation and load balancing in a multi-vendor environment.
NEW QUESTION # 81
What are three actions available tor MAC move limiting? (Choose three.)
Answer: A,B,C
Explanation:
* MAC Move Limiting:
* MAC move limiting is a security feature used in network switches to detect and mitigate rapid changes in MAC address locations, which could indicate a network issue or an attack such as MAC flapping or spoofing.
* When a MAC address is learned on a different interface than it was previously learned, the switch can take various actions to prevent potential issues.
* Available Actions:
* A. drop:This action drops packets from the MAC address if it violates the move limit, effectively blocking communication from the offending MAC address.
* D. log:This action logs the MAC move event without disrupting traffic, allowing network administrators to monitor and investigate the event.
* E. shutdown:This action shuts down the interface on which the MAC address violation occurred, effectively stopping all traffic on that interface to prevent further issues.
* Other Actions (Not Correct):
* B. filter:Filtering is not typically associated with MAC move limiting; it generally refers to applying ACLs or other mechanisms to filter traffic.
* C. enable:This is not an action related to MAC move limiting, as it does not represent a specific reaction to a MAC move event.
Data Center References:
* MAC move limiting is crucial for maintaining network stability and security, particularly in environments with dynamic or large-scale Layer 2 networks where MAC addresses might frequently change locations.
NEW QUESTION # 82
In an EVPN-VXLAN fabric, which statement describes the purpose of an EVPN Type 5 route?
Answer: D
Explanation:
EVPN Type 5 routes, also known as IP Prefix routes, are used to advertise Layer 3 reachability information for subnets or host routes across VXLAN domains. This allows inter-subnet routing between different VNIs or between data centers without requiring the destination MAC address to be known, which is especially useful for DCI scenarios and route summarization.
NEW QUESTION # 83
Which two statements are true about EVPN routes for Data Center Interconnect? (Choose two.)
Answer: B,D
Explanation:
* Type 2 EVPN Routes:
* Type 2 routesadvertise MAC addresses within an EVPN instance and are used primarily for Layer 2 bridging. These routes do not require a VXLAN tunnel to the protocol next hop because they operate within the same Layer 2 domain.
* Type 5 EVPN Routes:
* Type 5 routesare used to advertise IP prefixes (Layer 3 routes) within EVPN. Similar to Type 2 routes, they do not require a VXLAN tunnel to the protocol next hop because they represent L3 routes, which are managed at the routing layer without the need for VXLAN encapsulation.
Conclusion:
* Option B:Correct-Type 2 routes do not need a VXLAN tunnel to the next hop, as they are used for Layer 2.
* Option D:Correct-Type 5 routes also do not need a VXLAN tunnel because they operate at Layer 3, handling IP prefixes.
NEW QUESTION # 84
You are deploying an IP fabric using EBGP and notice that your leaf devices are advertising and receiving all the routes. However, the routes are not installed in the routing table and are marked as hidden.
Which two statements describe how to solve the issue? (Choose two.)
Answer: B,D
Explanation:
You need to configure a next-hop self policy: When using EBGP, the next-hop IP address in the routing advertisements might not be reachable from the receiving device, causing the routes to be marked as hidden. By configuring the next-hop-selfpolicy, the leaf devices will change the next-hop IP to their own IP address for the routes they advertise, making them reachable within the fabric and allowing the routes to be installed in the routing table.
You need to configure loops 2: When all leaves share the same AS (common-AS design), BGP loop prevention drops routes learned from the same AS. Configuring loops 2 allows the leaf to accept routes with its own AS in the path twice, which is needed in an eBGP IP fabric with repeated AS numbers.
NEW QUESTION # 85
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