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.

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. A network operator is implementing EVPN IRB on PE1. Which two command placements enable the advertisement of Type 2 routes and what information do Type 2 routes contain? (Choose two.)

A. The operator adds in "host-routing" under the VRF EVPN.

B. Type 2 routes contain MAC/IP information.

C. Type 2 routes contain Ethernet Auto-Discovery information.

D. The operator adds in "host-routing" under the BVI651 interface.

E. Type 2 routes contain inclusive source-specific multicast route information.

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?

A. Change the source IP address.

B. Add the IP address to the VRF table.

C. Remove the VRF from the interface.

D. Configure static routes for the VRF.

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.

Which condition must be met before an environment can support CSC?

A. The CSC-PE and CSC-CE must each be able to ping an interface in its respective global routing table.

B. The CSC-PE and the CSC-CE must support IPv6.

C. The CSC-PE and CSC-CE devices must be able to send labels to one another using BGP.

D. The CSC-CE must support OSPFv3.

Refer to the exhibit. Which statement describes the result of this configuration?

A. R1 redistributes BGP routes into the OSPF process of VRF custabc as E1 routes.

B. R1 redistributes BGP routes into the OSPF process of VRF custabc as E2 routes.

C. R1 mutually redistributes routes between BGP 65001 and the OSPF process of VRF custabc.

D. R1 redistributes BGP routes into the OSPF process of VRF custabc as OIA routes.

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 network engineer is implementing an OSPF configuration Based on the output, which statement is true?

A. In the ospfv3 1 area 1 ipv4 command, area 0 must be configured instead of area 1.

B. OSPFv3 does not run for IPv4 on FastEthemet0/0 until IPv6 routing is enabled on the router and IPv6 is enabled on interface Fastfc.thernet0/0

C. OSPFv3 cannot be configured for IPv4; OSPFv3 works only for IPv6.

D. IPv6 routing not enabled" is just an informational message and OSPFv3 runs for IPv4 on interface FastEthernet0/0 anyway