300-515

300-515 practice questions, page 5 of 5, with answer review and explanations.

Question 21

While troubleshooting an AToM L2VPN service, a network consultant notices that the AC Layer 2 encapsulations are different. Which action should the consultant take in order to make the MPLS L2VPN work?

  1. tag-rewrite on the ingress and egress PE router
  2. interworking IP configuration on the last PE router before label disposition
  3. nonrouted interworking setup to properly translate only the Layer 2 information from the AC
  4. interworking IP configuration on both the AC terminations on the PEs

Question 22

You try to configure MPLS VPN VRF Selection based on a source IP address on an interface that has VRF configured, but you receive an error. Which action must you take to correct the problem?

  1. Change the source IP address.
  2. Add the IP address to the VRF table.
  3. Remove the VRF from the interface.
  4. Configure static routes for the VRF.

Question 23

The CTO of a company requires the support of a network consultant to deliver an MPLS solution without resigning to a certain degree of redundancy and scalability. Which solution effectively scales to hundreds or thousands of sites?

  1. L2VPN with the broadcast traffic processed at the ingress PE.
  2. L3VPN with direct LSP connectivity between all PEs.
  3. L2VPN by encapsulating multiple frame formats with interworking.
  4. L3VPN using a hierarchical topology of N-PEs and U-PEs.

Question 24

Refer to the exhibit. An engineer is trying to configure an EVPN VWPS. What is the issue with this configuration?

  1. The member in the VPWS context should be the PE-facing interface.
  2. The 12vpn evpn command should be instance 101.
  3. Interface GigabitEthernet0/1/0 should not have any IP address.
  4. The service instance and the EVPN instance are different.

Question 25

You are troubleshooting ARP connectivity issues for an Ethernet interface on an IOS XR network that runs IS-IS. You verify that the IGP protocol is running, but an ARP entry has not yet been created. Which action should you take?

  1. debug ping packets
  2. debug ARP
  3. ping the connected neighbor
  4. verify the RIB table routes