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Juniper JN0-664: Service Provider, Professional (JNCIP-SP) exam is designed for professionals who want to enhance their skills and knowledge in the field of service provider technologies. Service Provider, Professional (JNCIP-SP) certification is a proof of the skills and knowledge that a candidate possesses in configuring and troubleshooting service provider routing technologies and implementing service provider VPN solutions.

Juniper Service Provider, Professional (JNCIP-SP) Sample Questions (Q27-Q32):

NEW QUESTION # 27
After a recent power outage, your manager asks you to investigate ways to automatically reduce the impact caused by suboptimal routing in your OSPF and OSPFv3 network after devices reboot.
Which three configuration statements accomplish this task? (Choose three.)

Answer: A,C,D

Explanation:
To reduce the impact of suboptimal routing in OSPF and OSPFv3 after devices reboot, you can use the overload feature to prevent a router from being used as a transit router for a specified period of time. This allows the router to stabilize its routing table before forwarding traffic for other routers. To enable the overload feature, you need to do the following:
For OSPF, configure the overload statement under [edit protocols ospf] hierarchy level. You can also specify a timeout value in seconds to indicate how long the router should remain in overload state after it boots up. For example, set protocols ospf overload timeout 900 means that the router will be in overload state for 15 minutes after it boots up.
For OSPFv3, configure the overload statement under [edit protocols ospf3] hierarchy level. You can also specify a realm (ipv4-unicast or ipv6-unicast) and a timeout value in seconds to indicate how long the router should remain in overload state after it boots up for each realm. For example, set protocols ospf3 realm ipv4-unicast overload timeout 900 means that the router will be in overload state for 15 minutes after it boots up for IPv4 unicast routing.


NEW QUESTION # 28
You are examining an L3VPN route that includes the information shown in the exhibit.
Which statement is correct in this scenario?

Answer: C

Explanation:
Type 1: When Type value is 1, the Administrator field is 4-bytes and Assigned Number field is 2- bytes.
The Administrator field should be set to the IP address (public IP addresses should be used). The Assigned Number field contains a number from a numbering space that is administered by the enterprise to which the IP address has been assigned by the appropriate authority.


NEW QUESTION # 29
Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501. Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?

Answer: B

Explanation:
To determine the correct answer, let's analyze the BGP path selection process and identify which attribute would be considered next in this scenario.
Background on BGP Path Selection
When multiple paths to the same destination are received via BGP, the router uses a step-by-step process to select the best path. The order of attributes considered is as follows (simplified for this scenario):
Highest Local Preference : The path with the highest local preference is preferred.
Shortest AS Path : The path with the shortest AS path length is preferred.
Lowest Origin Code : Paths with an origin code of IGP are preferred over EGP, and EGP is preferred over Incomplete.
Lowest MED (Multi-Exit Discriminator) : If the first three attributes are identical, the path with the lowest MED value is preferred.
eBGP over iBGP : eBGP paths are preferred over iBGP paths.
IGP Metric to Next Hop : The path with the lowest IGP metric to the next-hop router is preferred.
Router ID : If all else is equal, the path from the router with the lowest Router ID is preferred.
Peer IP Address : As a last tiebreaker, the path from the peer with the lowest IP address is preferred.
Scenario Analysis
In this scenario:
You are receiving the 203.0.113.0/24 network via EBGP from two different autonomous systems (AS 64500 and AS 64501).
Both advertisements have identical local-preference values , AS-path lengths , and BGP origin codes .
Given that the first three attributes in the BGP path selection process are identical, the next attribute to consider is the MED (Multi-Exit Discriminator) value.
Analysis of the Options
Option A: Router ID
Incorrect : The Router ID is considered much later in the BGP path selection process, only after other attributes like MED and IGP metric have been evaluated. Since MED is still relevant here, Router ID is not the next attribute to consider.
Option B: MED value
Correct : The MED value is used to influence inbound traffic from neighboring ASes. When local preference, AS path length, and origin code are identical, the path with the lowest MED value is preferred. This makes MED the next attribute to consider in this scenario.
Option C: Peer IP Address
Incorrect : The peer IP address is a tiebreaker used only at the very end of the BGP path selection process, after all other attributes have been evaluated. It is not relevant here because MED has not yet been considered.
Option D: IGP Metric
Incorrect : The IGP metric to the next-hop router is considered after MED. Since MED is still relevant in this scenario, IGP metric is not the next attribute to evaluate.
Final Answer
The correct answer is:
B . MED value
Summary
When local preference, AS path length, and origin code are identical, the MED value is the next attribute considered in the BGP path selection process.
MED is used to influence how traffic enters your AS from neighboring ASes.


NEW QUESTION # 30
You have an L2VPN connecting two CEs across a provider network that runs OSPF. You have OSPF configured on both CEs.
Which two statements are correct in this scenario? (Choose two.)

Answer: B,C

Explanation:
In an L2VPN scenario, the provider network connects two customer edge (CE) devices across a Layer 2 virtual private network. Let's analyze how OSPF operates in this setup.
1. **OSPF Neighborship in L2VPN**:
- An L2VPN provides a Layer 2 connection between two sites, making it transparent to Layer 3 protocols like OSPF. This means the CEs can form OSPF adjacencies directly with each other as if they were on the same local network.
2. **OSPF Configuration on CEs and PEs**:
- **Statement A: OSPF neighborship is formed between the CEs and PEs**:
- Incorrect. In an L2VPN, the provider's network is transparent to the OSPF running on the CEs. OSPF neighborship forms directly between the CEs, not between the CEs and PEs.
- **Statement B: The CE and PE OSPF areas can be different**:
- Correct. Since OSPF adjacencies form directly between the CEs and not between CEs and PEs, the OSPF areas on the CEs and PEs can be different. The provider network acts as a transparent bridge, and OSPF doesn't see the PEs.
- **Statement C: The CE and PE OSPF areas must match**:
- Incorrect. As noted above, because the OSPF neighborship forms directly between the CEs, the OSPF areas on the CEs and PEs do not need to match.
- **Statement D: OSPF neighborship is formed between the two CEs**:
- Correct. The L2VPN makes the connection between the two CEs appear as a direct Layer 2 link, allowing them to form an OSPF adjacency directly.
**Conclusion**:
Given the above analysis, the correct statements are:
**B. The CE and PE OSPF areas can be different.**
**D. OSPF neighborship is formed between the two CEs.**
**References**:
- Juniper Networks Documentation on L2VPNs: [Configuring Layer 2
VPNs](https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/layer-2-vpns-configuring.
- OSPF Configuration Guide: [Junos OS OSPF
Configuration](https://www.juniper.net/documentation/en_US/junos/topics/concept/ospf-routing-overview.html)


NEW QUESTION # 31
Exhibit

You are troubleshooting the connection between AS 64496 and AS 64497 and notice that only one of the paths is being used for traffic forwarding.
Referring to the exhibit, which three actions will ensure that R1 is configured properly for load balancing BGP routes? (Choose three.)

Answer: A,D,E


NEW QUESTION # 32
......

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