A data center architect is designing a new IP fabric with a spine-and-leaf topology. The fabric will support multiple tenants, and the team wants to use EBGP as the underlay. The architect needs to ensure that the underlay does not carry tenant-specific routes and that the fabric scales to accommodate future leaf additions without requiring changes to existing spine configurations. Which design principle should the architect apply?

Use a single OSPF area with all links, and configure route summarization on each leaf to reduce the number of routes advertised.

Use a full mesh of EBGP sessions between all leaves and spines, and advertise all loopback addresses and tenant subnets.

Use a single EBGP session between each leaf and each spine, and advertise only loopback addresses and /31 point-to-point links.

Use OSPF as the underlay with area 0 on all links, and redistribute tenant VRF routes into OSPF.

How does EVPN provide multi-tenancy in an IP fabric overlay?

By assigning each tenant a unique MAC address range.

By creating a separate physical network for each tenant.

By using separate routing instances and VXLAN network identifiers (VNIs) to isolate tenant traffic.

By encrypting tenant traffic with different keys.

A network engineer is troubleshooting a VXLAN EVPN fabric where some hosts on different leaf switches cannot communicate. The underlay is EBGP with each leaf having a single session to each spine. The engineer checks the underlay and finds that all BGP sessions are established and all loopback routes are present in the routing table. However, on the leaf where the destination host is connected, the EVPN route for the remote host's MAC/IP is not present. What is the most likely cause of this issue?

The EVPN address family is not enabled on the EBGP sessions between the leaves and spines.

The MTU on the leaf-to-spine links is set to 1500 bytes, causing VXLAN packets to be dropped.

The VXLAN VNI is not configured on the destination leaf's IRB interface.

The spine switches are not configured with the same AS number as the leaves.

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 2Objective 5

IP Fabric Best Practices JN0-683 Practice Questions (Page 3)

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 14 practice questions to prepare you well beyond it. (estimate)

14questions here

3free pages

5concepts

Questions 11–14

11application · medium
A data center architect is designing a new IP fabric with a spine-and-leaf topology. The fabric will support multiple tenants, and the team wants to use EBGP as the underlay. The architect needs to ensure that the underlay does not carry tenant-specific routes and that the fabric scales to accommodate future leaf additions without requiring changes to existing spine configurations. Which design principle should the architect apply?
Select an answer first
12foundation · easy
How does EVPN provide multi-tenancy in an IP fabric overlay?
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13expert · hard
A network engineer is troubleshooting a VXLAN EVPN fabric where some hosts on different leaf switches cannot communicate. The underlay is EBGP with each leaf having a single session to each spine. The engineer checks the underlay and finds that all BGP sessions are established and all loopback routes are present in the routing table. However, on the leaf where the destination host is connected, the EVPN route for the remote host's MAC/IP is not present. What is the most likely cause of this issue?
Select an answer first
14foundation · easy
When troubleshooting an IP fabric, which command would you use to verify that the underlay BGP sessions are established?
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IP Fabric Best Practices JN0-683 Practice Questions (Page 3)

Questions 11–14

How does EVPN provide multi-tenancy in an IP fabric overlay?

When troubleshooting an IP fabric, which command would you use to verify that the underlay BGP sessions are established?

Keep studying — Layer 3 Fabrics