Juniper Juniper Certifications JN0-681 Questions & Answers

• Question 11:

  You are deploying a VXLAN using EVPN signalling overlay network in your new data center. You are able to establish your MP-BGP peering sessions and see your EVPN routes, but traffic will not traverse the VXLAN using EVPN signalling overlay network.

  What is a solution to this problem?

  A. Increase the MTU on the logical VTEP source interface of all devices participating in VXLAN using EVPN signaling.

  B. Enable the mtu-discovery feature on the MP-BGP peering sessions between all VXLANs using EVPN signalling peers.

  C. Increase the protocol MTU on all devices participating in VXLAN using EVPN signalling.

  D. Increase the physical MTU on all ports on all devices participating in VXLAN using EVPN signalling.

  Correct Answer: D

• Question 12:

  You have a site with thousands of MAC addresses multihomed to two leaf nodes in an EVPN VXLAN.

  In this scenario, which EVPN feature provides fast network convergence in the event of a leaf node link failure?

  A. BGP Additional Paths

  B. Bidirectional Forwarding Detection

  C. Ethernet Autodiscovery

  D. Fast reroute

  Correct Answer: C

• Question 13:

  What are two methods used to scale an IBGP IP Fabric? (Choose two.)

  A. spanning tree

  B. redundant trunk groups

  C. route reflection

  D. confederations

  Correct Answer: CD

• Question 14:

  Which protocol is used between VCF member devices to create a loop-free topology?

  A. LLDP

  B. MSTP

  C. RSTP

  D. VCCP

  Correct Answer: D

• Question 15:

  You have deployed a VXLAN as shown in the exhibit Leaf1, leaf3, spine1, and spine2 have been configured as VTEPs. Host1 cannot communicate with host2.

  

  Referring to the exhibit, how would you solve this problem?

  A. The VLAN ID on the link connected to host2 must be changed to VLAN 100.

  B. A DCI connection must be created between the VLANs.

  C. A Layer 3 VXLAN gateway must be configured on at least one of the devices.

  D. Host1 and host2 must be placed in the same VRF.

  Correct Answer: C

• Question 16:

  You are creating a new EVPN and are asked to selectively accept certain MAC advertisement routes from your EVPN peers using VXLAN encapsulation.

  Which statement is correct in this scenario?

  A. You can use MAC filtering to filter out unwanted routes.

  B. You can use VRF import policies and route distinguisher values to filter out unwanted routes.

  C. You can use VRF import policies and community values to filter out unwanted routes.

  D. You can use firewall filters to filter out unwanted routes.

  Correct Answer: C

• Question 17:

  A VXLAN has been created between devices leaf1 and leaf3.

  

  Referring to the exhibit, which statement is true?

  A. Traffic sent from host1 to host2 will be tagged with VLAN ID 200 when exiting leaf3.

  B. Traffic sent from leaf1 to host2 will he dropped on leaf1.

  C. Traffic sent from host1 to host2 will be tagged with VLAN ID 100 when exiting leaf3.

  D. Traffic sent from leaf1 to host2 will he dropped on leaf3.

  Correct Answer: A

• Question 18:

  What is the endpoint of a VXLAN tunnel?

  A. DLCI

  B. VTEP

  C. LSR

  D. VCF

  Correct Answer: B

• Question 19:

  Which EVPN route type prevents BUM traffic from looping back to a multihomed host?

  A. IP prefix route

  B. Ethernet autodiscovery route

  C. Ethernet segment route

  D. inclusive multicast-Ethernet tag route

  Correct Answer: B

• Question 20:

  Your colleague has begun working on the base configuration for an active-active multihomed EVPN connection shown in the exhibit.

  

  Which two actions will ensure a successful implementation? (Choose two.)

  A. Change the ESI mode on PE1 to single-active.

  B. Change the ESI mode on PE2 to all-active.

  C. Change the ESI value on the PE2 device to 00:00:00:00:00:00:00:00:00:00.

  D. Change the ESI value on the PE1 device to 00:22:44:66:88:00:22:44:66:88.

  Correct Answer: BD