A data center engineer is designing an EVPN-VXLAN fabric and wants to ensure that MAC addresses learned from remote VTEPs are not aged out prematurely, especially for hosts that are idle for long periods. What is the recommended approach?

Disable MAC aging on all leaf switches

Rely on the BGP EVPN route advertisement and withdrawal mechanism to manage remote MAC entries

Increase the local MAC aging timer to the maximum value

Configure a static MAC entry for each remote host

A network engineer is troubleshooting a MAC mobility issue in an EVPN-VXLAN fabric. A host moved from leaf-1 to leaf-2, but the MAC mobility extended community sequence number was not incremented. What is the likely outcome?

The MAC aging timer will expire and remove the old entry

Remote VTEPs will continue to use the old MAC entry, causing traffic to be sent to leaf-1

The duplicate MAC detection timer will trigger and suppress the new route

Remote VTEPs will automatically flush the old MAC entry and use the new one

When a VTEP detects a duplicate MAC address, what action does it take to prevent the duplicate from causing forwarding issues?

It sends a BGP route with a higher sequence number to override the duplicate.

It floods the MAC address to all VTEPs to ensure they have the latest information.

It immediately shuts down the interface where the duplicate MAC was seen.

It stops advertising the MAC address in BGP EVPN Type 2 routes and may remove the existing route.

An engineer notices that a remote MAC address learned via EVPN on a leaf switch is not being aged out even after the host has been offline for several hours. The MAC aging timer is set to the default value. What is the most likely reason for this behavior?

The MAC-VRF is configured with 'no-mac-learning'

Remote MAC addresses are not subject to aging and are only removed when the BGP session goes down or a route withdrawal is received

The duplicate MAC detection timer is interfering with the aging process

The MAC aging timer is configured in seconds instead of minutes

A network administrator is troubleshooting a MAC flap issue in an EVPN-VXLAN fabric. The same MAC address is being advertised from two different VTEPs, causing continuous route updates. The administrator wants to suppress the flapping while allowing the fabric to converge. What should the administrator configure?

Enable duplicate MAC detection with an appropriate timer and threshold

Configure a static MAC address entry on one of the VTEPs

Increase the MAC aging timer on all leaf switches

Disable MAC learning on the affected VTEPs

Juniper NetworksCertified Professional, Data Center (JNCIP-DC)

Domain 4Objective 5

MAC Learning JN0-683 Practice Questions (Page 1)

Part of the EVPN-VXLAN Signaling domain, which makes up ~27% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~9–16 in this domain), expect 1–2 from this objective — we provide 19 practice questions to prepare you well beyond it. (estimate)

19questions here

4free pages

4concepts

Questions 1–5

1application · medium
A data center engineer is designing an EVPN-VXLAN fabric and wants to ensure that MAC addresses learned from remote VTEPs are not aged out prematurely, especially for hosts that are idle for long periods. What is the recommended approach?
Select an answer first
2application · medium
A network engineer is troubleshooting a MAC mobility issue in an EVPN-VXLAN fabric. A host moved from leaf-1 to leaf-2, but the MAC mobility extended community sequence number was not incremented. What is the likely outcome?
Select an answer first
3foundation · easy
When a VTEP detects a duplicate MAC address, what action does it take to prevent the duplicate from causing forwarding issues?
Select an answer first
4application · medium
An engineer notices that a remote MAC address learned via EVPN on a leaf switch is not being aged out even after the host has been offline for several hours. The MAC aging timer is set to the default value. What is the most likely reason for this behavior?
Select an answer first
5application · medium
A network administrator is troubleshooting a MAC flap issue in an EVPN-VXLAN fabric. The same MAC address is being advertised from two different VTEPs, causing continuous route updates. The administrator wants to suppress the flapping while allowing the fabric to converge. What should the administrator configure?
Select an answer first

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