A large data center fabric uses iBGP as the underlay. The network team wants to reduce the number of iBGP sessions while maintaining full reachability. Which BGP scaling mechanism should they implement?

Enable BGP multipath on all switches.

Use BGP confederations with sub-AS numbers.

Increase the BGP keepalive timer.

Configure route reflectors on a subset of spine switches.

A data center operator is designing a leaf-spine fabric with 4 spines and 20 leaves. Each leaf has two 100GbE uplinks to each spine. They want to ensure that a single spine failure does not cause more than 25% bandwidth loss on any leaf. Which design change best meets this requirement?

Add one additional 100GbE uplink from each leaf to each spine, creating 3 links per spine.

Add one additional spine switch and connect each leaf to it with two 100GbE links.

Reduce the number of spines to 2 and add more uplinks per spine.

Enable BGP route reflection on all spines.

What is the primary focus of scaling the underlay network in an IP fabric?

Scaling the physical topology and IP routing to provide connectivity between all devices

Configuring tenant-specific routing policies

Increasing the number of VTEPs and VXLAN tunnels

Managing MAC address tables on leaf switches

A network operator is troubleshooting a BGP-based IP fabric where some leaf switches are not receiving all routes from the route reflector. The BGP sessions are up. Which operational check should they perform first?

Verify that the route reflector is configured with the correct cluster ID and that no route reflection loops exist.

Reboot the leaf switches to reset BGP.

Increase the BGP hold timer on the route reflector.

A network architect is designing an IP fabric and must choose between scaling the underlay and scaling the overlay. The underlay currently has 4 spines and 20 leaves, with ECMP providing good bandwidth. The overlay is expected to grow to 10,000 MAC addresses and 1,000 tenants. Which scaling investment will have the most direct impact on meeting the overlay growth?

Deploy EVPN-VXLAN with route targets and route distinguishers.

Add more spine switches to increase ECMP paths.

Enable BGP confederations on the underlay.

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 2Objective 3

IP Fabric Scaling JN0-683 Practice Questions (Page 5)

Part of the Layer 3 Fabrics domain, which makes up ~23% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 1–2 from this objective — we provide 32 practice questions to prepare you well beyond it. (estimate)

32questions here

7free pages

8concepts

Questions 21–25

21application · medium
A large data center fabric uses iBGP as the underlay. The network team wants to reduce the number of iBGP sessions while maintaining full reachability. Which BGP scaling mechanism should they implement?
Select an answer first
22expert · hard
A data center operator is designing a leaf-spine fabric with 4 spines and 20 leaves. Each leaf has two 100GbE uplinks to each spine. They want to ensure that a single spine failure does not cause more than 25% bandwidth loss on any leaf. Which design change best meets this requirement?
Select an answer first
23foundation · easy
What is the primary focus of scaling the underlay network in an IP fabric?
Select an answer first
24application · medium
A network operator is troubleshooting a BGP-based IP fabric where some leaf switches are not receiving all routes from the route reflector. The BGP sessions are up. Which operational check should they perform first?
Select an answer first
25expert · hard
A network architect is designing an IP fabric and must choose between scaling the underlay and scaling the overlay. The underlay currently has 4 spines and 20 leaves, with ECMP providing good bandwidth. The overlay is expected to grow to 10,000 MAC addresses and 1,000 tenants. Which scaling investment will have the most direct impact on meeting the overlay growth?
Select an answer first

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