Discuss Juniper JN0-664 Exam Topic 2 Question 35

Refer to the exhibit.

Click the Exhibit button.

Referring to the exhibit, you must provide VRF Internet access over a single connection for VPN-A Site 1, which connects to PE-1.

Which two statements are correct in this scenario? (Choose two.)

AYou must use the RIB group to move a default route, which is learned through BGP, from the inet. o table to the VPN-A. inet. 0 table.

BYou do not need to use the RIB group to move interface routes from the inet. o table to the VPN-A. inet. 0 table.

CYou do not need to use the RIB group default route, which is learned through BGP, from the inet. o table to the VPN-A. inet. 0 table.

DYou must use the RIB group to move interface routes from the inet . 0 table to the VPN-A. inet. 0 table.

Suggested Answer: A, B

In the provided exhibit, the configuration involves using a RIB (Routing Information Base) group to facilitate internet access for VPN-A Site 1 through PE-1. The goal is to provide VRF Internet access over a single connection.

1. **Understanding RIB Groups**:

- RIB groups allow for the import and export of routes between different routing tables.

- In this scenario, we have two RIBs: `inet.0` (the main routing table) and `VPN-A.inet.0` (the VRF-specific routing table).

2. **Statement Analysis**:

- **A. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

- Correct. To provide Internet access to VPN-A, the default route (0.0.0.0/0) learned via BGP in the `inet.0` table must be made available in the `VPN-A.inet.0` table. This is done using the RIB group to import the default route.

- **B. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

- Correct. Interface routes (connected routes) are typically directly added to both the global and the VRF routing tables without needing a RIB group. These routes are known to the VRF because the interfaces are part of the VRF configuration.

- **C. You do not need to use the RIB group default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

- Incorrect. As discussed, the default route needs to be imported into the VRF's routing table using a RIB group to enable Internet access for the VRF.

- **D. You must use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

- Incorrect. Interface routes are directly associated with the VRF interfaces and are automatically known to the VRF routing table. There is no need to use a RIB group for these routes.

**Conclusion**:

The correct answers are:

**A. You must use the RIB group to move a default route, which is learned through BGP, from the inet.0 table to the VPN-A.inet.0 table.**

**B. You do not need to use the RIB group to move interface routes from the inet.0 table to the VPN-A.inet.0 table.**

**Reference**:

- Juniper Networks Documentation on RIB Groups: [RIB Groups Overview](https://www.juniper.net/documentation/en_US/junos/topics/concept/rib-groups-overview.html)

- Junos OS VPNs Configuration Guide: [Junos VPNs Configuration](https://www.juniper.net/documentation/en_US/junos/topics/concept/vpns-overview.html)

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32 comments · newest first

Sherell 11 months ago

C sounds right, no RIB group needed for that.

Dulce 11 months ago

D is definitely not needed, just use A and B.

Samira 11 months ago

Wait, are we sure about B? Seems off to me.

Lindsey 11 months ago

Totally agree with A, makes sense!

Juliann 12 months ago

A is correct, you need the RIB group for default routes.

Tiera 12 months ago

D seems plausible, but I wonder if we really need the RIB group for interface routes. I think we had a similar question in our review.

Janey 1 year ago

I feel like C could be misleading; we definitely talked about needing to manage default routes with RIB groups, but I can't recall the specifics.

Donette 1 year ago

I'm not entirely sure about B, but I remember something about interface routes being handled differently than BGP routes.

Delsie 1 year ago

I think option A might be correct since we discussed how RIB groups are used for route manipulation in our last practice session.

Winfred 1 year ago

This seems straightforward enough. I'll just need to remember the specifics about using the RIB group to move the routes.

Lazaro 1 year ago

I've seen similar questions before, so I think I have a good strategy for this. I'll start by identifying which statements are correct based on the information provided.

Paris 1 year ago

I'm a bit confused by the wording on some of these options. Let me re-read it a couple times to make sure I'm understanding correctly.

My 1 year ago

Okay, I think I understand the key points here. I'll focus on the RIB group and how to move the routes between the tables.

Dorinda 1 year ago

Hmm, this looks like a tricky one. I'll need to carefully read through the details and think through the options.

Shawnta 1 year ago

Read carefully. Multiple agencies, same MCEs, each enforcing their own rules. Yep, that's definitely the parallel approach. Process of elimination works here too.

Afton 2 years ago

This is a piece of cake! B and D are the answers. I could do this in my sleep. Oh wait, maybe I already did - that would explain a lot about my study habits.

Ona 2 years ago

C and D, for sure. Why would you need to use the RIB group for the default route? That's just silly. But the interface routes, yeah, you gotta move those over.

Annett 2 years ago

↳ replying to Ona

Agreed, no need for the RIB group for the default route. Moving interface routes is the key.

Juliana 2 years ago

↳ replying to Ona

Definitely, C and D are the way to go. Interface routes are crucial for VRF Internet access.

Ellsworth 2 years ago

↳ replying to Ona

Yeah, using the RIB group for the default route seems unnecessary. Interface routes are the ones that need to be moved.

Yuette 2 years ago

↳ replying to Ona

I agree, C and D are the correct statements. Moving interface routes is necessary.

Sina 2 years ago

Hmm, this seems tricky. I'm going to go with A and D. Moving that default route to the VPN-A table is key, and you definitely need to use the RIB group for the interface routes.

Selma 2 years ago

↳ replying to Sina

Definitely, A and D are the way to go. It's important to ensure proper routing for VPN-A Site 1 over a single connection.

Cassie 2 years ago

↳ replying to Sina

Yes, using the RIB group for both tasks is crucial in this scenario. Good call on selecting A and D.

Layla 2 years ago

↳ replying to Sina

I agree, A and D are the correct choices. Moving the default route and interface routes is essential for VRF Internet access.

Lamar 2 years ago

I'm not sure about option B and C, but I think we definitely need to use the RIB group for this scenario.

Lou 2 years ago

I think B and D are the correct answers here. You don't need to use the RIB group to move the default route, but you do need to use it for the interface routes.

Maryrose 2 years ago

↳ replying to Lou

It's important to ensure VRF Internet access over a single connection for VPN-A Site 1.

Jacqueline 2 years ago

↳ replying to Lou

Using the RIB group for interface routes makes sense.

Carri 2 years ago

↳ replying to Lou

I agree, B and D are the correct answers.

Linette 2 years ago

I agree with you, Sharen. Option D also seems correct as we need to move interface routes from inet.0 table to VPN-A. inet.0 table.

Sharen 2 years ago

I think option A is correct because we need to move the default route from inet.0 table to VPN-A. inet.0 table.

Juniper JN0-664 Exam - Topic 2 Question 35 Discussion