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| Section | Objectives |
|---|---|
| Topic 1: BGP | - BGP Routing
|
| Topic 2: Layer 3 VPNs | - L3VPN Deployment
|
| Topic 3: Layer 2 VPNs | - L2VPN Technologies
|
| Topic 4: IGP | - OSPF
|
| Topic 5: Multicast | - Multicast Routing
|
| Topic 6: MPLS | - RSVP and Traffic Engineering
|
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NEW QUESTION # 80
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: B,C,E
NEW QUESTION # 81 
Click the Exhibit button.
Which two statements are correct about the class-of-service configuration shown in the exhibit? (Choose two.)
Answer: A,D
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/traffic-mgmt-qfx/topics/concept/cos-qfx-series- default-scheduling-classification-understanding.html
NEW QUESTION # 82
Exhibit.
Referring to the exhibit, what must be changed to establish a Level 1 adjacency between routers R1 and R2?
Answer: C
NEW QUESTION # 83
In IS-IS, which two statements are correct about the designated intermediate system (DIS) on a multi-access network segment? (Choose two)
Answer: B,D
Explanation:
Option A (Correct):
In IS-IS, the Designated Intermediate System (DIS) is elected based on the highest configured priority (as defined in Junos OS).
If priorities are equal, the router with the highest MAC address becomes the DIS.
A priority value of 10 will always override a lower priority (e.g., 1).
Reference:
Option C (Correct):
On a multi-access network (e.g., Ethernet), all IS-IS routers form adjacencies with every other router on the segment.
Unlike OSPF, IS-IS does not restrict adjacencies to only the DIS.
The DIS is responsible for creating a pseudonode LSP to represent the broadcast network, but full mesh adjacencies are maintained.
Why Other Options Are Incorrect:
Option B: Incorrect. Higher priority always wins the DIS election. A priority of 1 cannot override a priority of 10.
Option D: Incorrect. IS-IS routers form adjacencies with all neighbors, not just the DIS.
Key Takeaways:
DIS Election: Prioritizes highest numerical value (e.g., 10 > 1).
Adjacency Behavior: Full mesh adjacencies are maintained, unlike OSPF.
DIS Role: Primarily for generating pseudonode LSPs and optimizing flooding, not adjacency restriction.
For further details, refer to Juniper's official IS-IS documentation:
Juniper IS-IS Configuration Guide.
https://www.juniper.net/documentation/us/en/software/junos/is-is/topics/concept/routing-protocol-is-is-security-designated-router-understanding.html
NEW QUESTION # 84 
Click the Exhibit button.
After adding Customer C to your Layer 3 VPN, you must ensure that PE2 is receiving VPN routes for all customers attached to PE1, as shown in the exhibit.
Which operational command displays this information?
Answer: B
Explanation:
In the context of Layer 3 VPNs (L3VPN) using MPLS, the routing information for different customers (VPNs) is typically stored in separate routing tables (VRFs). When you want to verify that PE2 is receiving the VPN routes for Customer C from PE1, you need to check the appropriate VRF routing table on PE2.
1. **Option A: show route table customer-c.inet.0**
- This command displays the routing table specific to Customer C's VRF.
- Since we want to verify that PE2 has received the VPN routes for Customer C, this is the most appropriate command to use.
- It allows us to see all routes learned for Customer C's VPN.
2. **Option B: show route table bgp.l3vpn.0**
- This command displays the BGP routing table for all L3VPN routes.
- While this includes routes for Customer C, it also includes routes for all other VPNs, making it harder to isolate the specific information for Customer C.
- This command is more useful for an overall view of BGP L3VPN routes rather than for a specific customer's VRF.
3. **Option C: show route summary**
- This command provides a summary of the routes in all routing tables.
- It doesn't give detailed information about the specific routes for Customer C's VRF.
- It's useful for a high-level overview but not for verifying specific customer routes.
4. **Option D: show route table inet.0**
- This command shows the global routing table, not the VRF-specific tables.
- The global routing table doesn't contain the VPN-specific routes that are stored in the VRF tables.
- Therefore, it won't help in verifying the routes for Customer C.
**Conclusion**:
To verify that PE2 is receiving VPN routes for Customer C from PE1, the most appropriate command is to check the specific VRF routing table for Customer C. Hence, the correct answer is:
**A. show route table customer-c.inet.0**
**References**:
- Junos OS documentation on MPLS VPNs: [Junos MPLS VPNs
Guide](https://www.juniper.net/documentation/en_US/junos/topics/topic-map/mpls-vpns.html)
- Command Reference for Routing Tables: [Junos OS Routing Tables Command Reference](https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-rout
NEW QUESTION # 85
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