300-515 Online Practice Questions and Answers

Which two statements describe primary differences between MPLS Layer 2 and Layer 3 VPNs? (Choose two.)

A. Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use L2TPv3 tunneling.

B. Layer 2 VPNs use AToM, but Layer 3 VPNs use MPLS/BGP.

C. Layer 2 VPNs use BGP, but Layer 3 VPNs use VPLS.

D. Layer 2 VPNs use L2TPv3 tunneling, but Layer 3 VPNs use GRE tunneling.

E. Layer 2 VPNs use IPsec tunneling, but Layer 3 VPNs use pseudowires to provide tunneling.

Refer to the exhibit. A network engineer has been called to configure the four PE devices in order to enable full communication among the four CE devices connected to them. While starting to configure, he experienced a connectivity issue. Which two tasks should the engineer perform in order to begin the process correctly? (Choose two.)

A. Configure PE3 to export route-targets 100:1 and 200:2.

B. Configure PE3 to import route-targets 100:1 and 200:2.

C. Configure PE4 to import route-targets 101:1 and 202:2.

D. Configure PE2 to export route-targets 300:3 and 400:4.

E. Configure PE1 to import route-targets 300:3 and 400:4.

An ISP provides a major client MPLS VPN for managed services. The MPLS engineering team needs to use the advanced VPN feature of selective VRF import so that only specific prefixes are present in the required VPNs. Which aspect of this feature must the team consider?

A. A route must pass the import route map first and then the route target import filter.

B. The routers that are imported in the VRF can be BGP and IGP routes, so other match conditions in the route map, besides communities, can be used.

C. The import-map command is applied under the PE interface that connects to the CE router.

D. A route is imported into the VRF only when at least one RT that is attached to the route matches one RT that is configured in the VRF and the route is permitted by the import route map.

While configuring the VRF Selection feature, you get an error message after typing the below statement:

Router(config)#no vrf selection source 172.16.0.0 255.255.0.0 vrf VRF1

Which action caused this message?

A. the entry of an inconsistent IP address and mask for VRF Selection

B. an attempt to configure a VRF instance on an interface that already has VRF Selection configured

C. an attempt to remove a VRF Selection entry that does not exist

D. an attempt to configure a VRF Selection table that does not exist

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

A. The member in the VPWS context should be the PE-facing interface.

B. The 12vpn evpn command should be instance 101.

C. Interface GigabitEthernet0/1/0 should not have any IP address.

D. The service instance and the EVPN instance are different.

Refer to the exhibit. Which effect of this configuration is true?

A. It configures VPWS multihomed.

B. It configures VPWS single homed.

C. It configures an IPv4 peering with 192.168.1.1

D. It configures MPLS traffic engineering.

Refer to the exhibit. The CE router has established a BGP peering with the PE router, and the CE will use the core infrastructure of the PE as a backbone carrier to support CSC. Which additional task can you perform to complete the configuration?

A. Configure static routing on the CE router.

B. Configure the address-family ipv4 labeled-unicast command under the neighbor configuration of the CE router for the PE.

C. Change the rd value to 65001:65001 under the VRF section of the PE router.

D. Configure OSPF on the PE router.

Refer to the exhibit. A customer carrier running MPLS VPN wants to utilize a backbone carrier to forward traffic and exchange VPNv4 prefixes between the two customer carrier networks depicted. Which two sets of routers must establish MPiBGP sessions? (Choose two.)

A. BB-PE-A and CC-PE-B

B. CC-PE-A and CC-PE-B

C. BB-PE-A and BB-PE-B

D. CC-PE-A and BB-PE-A

E. BB-PE-A and BB-P-A

F. CC-PE-A and CC-P-A

Refer to the exhibit. While provisioning a new BGP session between the PE and CE router, you issue the as-override command. Which statement describes modification of the prefix before being sent to the CE router (10.10.10.1)?

A. The fourth AS changes, but no other autonomous systems change.

B. The first and fourth autonomous systems change.

C. The second and third autonomous systems change.

D. The first AS changes, but no other autonomous systems change.

Refer to the exhibit. A technician is troubleshooting a connectivity issue and notices that there is no IS-IS adjacency between R1 and R2. What can the technician change to bring the IS-IS adjacency up?

A. Change R2's net address to be in the same area as R1.

B. Change R1's is-type to level-2-only

C. Change R1's net address to be in the same area as R2.

D. Change R2's configuration to no longer set the overload bit.