300-515 Online Practice Questions and Answers

What is the primary function of a VRF on a router?

A. It enables the router to support multiple separate routing tables, which allows the device to handle overlapping IP addresses.

B. It enables a router to run BGP and a distance vector routing protocol at the same time, which allows it to serve as a VPN endpoint between remote sites.

C. It enables a router to configure VLANs locally, which provides segregation between networks.

D. It enables the router to provide faster switching through the network by using labels to identify the input and output interfaces for neighbor routers.

An engineer is investigating an EVPN traffic flow issue. Which type of traffic should the engineer allow in an EVPN Tree Service in order to fix this issue?

A. known unicast from a leaf to another leaf

B. unknown unicast from a leaf to another leaf

C. multicast from a leaf to another leaf

D. known unicast from a root to another root

An engineer is investigating an MPLS LDP issue. Which command should an engineer use on a Cisco IOS XE device to display the contents of the LFIB?

A. show mpls forwarding-table

B. show mpls ldp neighbors

C. show mpls ldp labels

D. show mpls ldp bindings

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.

Which two BGP attributes prevent loops in a route reflector environment? (Choose two.)

A. cluster ID

B. local preference

C. origin

D. originator ID

E. AS_PATH

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.

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?

A. tag-rewrite on the ingress and egress PE router

B. interworking IP configuration on the last PE router before label disposition

C. nonrouted interworking setup to properly translate only the Layer 2 information from the AC

D. interworking IP configuration on both the AC terminations on the PEs

What must match in the EVPN and L2VPN configuration mode when configuring EVPN native in a router?

A. interface

B. address family

C. bridge domain

D. EVI

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 about this configuration is true?

A. Router 1 will accept multicast routes with a route-target of 12:1.

B. 192.168.1.2 must be reachable by all routers participating in the mvpn-intranet MVRF.

C. Router 1 has statically defined thresholds for data MDT.

D. The MVRF must be configured on each router on the customer and service provider networks.

Refer to the exhibit. What is the effect of this configuration?

A. The mroute table is cleared.

B. Router 1 accepts multicast routes with a tag of 12:1

C. A Cisco MPLS TE tunnel is generated with 192.168.1.2 as the source IP address of router 1.

D. An LSP virtual interface tunnel is created.

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

A. R1 operates using IPv4 and VPNv4 address families.

B. R1 operates on IPv6 only because the bgp default ipv4-unicast command is missing.

C. R1 establishes a VPNv4 eBGP relationship with neighbor 192.168.1.1.

D. R1 establishes an iBGP relationship with peer 192.168.1.1.

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.

Which BGP feature causes to replace the AS number of originating router with the AS number of the sending router?

A. route reflectors

B. route dampening

C. confederations

D. AS override

Refer to the exhibit.

Refer to the exhibit Router 1 is a P router in the ISP MPLS core A connected P router cannot generate an MPLS label for the router 1 loopback0 interface Which action resolves this issue?

A. The loopback0 interface must be in OSPF area 0.

B. The network statement under the routing process must have a wildcard mask of 0 0.0 255.

C. The OSPF network type must be changed on loopback0 to point-to-point

D. A static route to null 0 must be added for the loopback interface and then static routes must be redistributed into OSPF