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300-515 Dumps 2022 - New Cisco 300-515 Exam Questions
NEW QUESTION 16
In Layer 3 MPLS VPN implementations, if some of the VPNv4 routes on one PE router do not appear on another PE router, what could be the problem?
- A. VRF name mismatch between the PE routers
- B. RD mismatch between the PE routers
- C. RT export and import configuration errors
- D. RD export and import configuration errors
Answer: C
Explanation:
Section: Layer 3 VPNs
Explanation/Reference: http://blog.initialdraft.com/archives/1537/
NEW QUESTION 17
Refer to the exhibit.
PE1 and PE2 are exchanging VPNv4 routes for CE1 and CE2, and PE3 contains the default route to the internet. If the three devices are operating normally, which two conclusions describe this configuration? (Choose two.)
- A. Only the CE2 VRF can access the default route provided by the Internet VRF.
- B. The CE1 and CE2 VRFs can access the default route provided by the Internet VRF.
- C. All three routers must be running MP-BGP.
- D. The CE1 and CE2 VRFs can exchange routes only between their respective VRFs on PE1 and PE2.
- E. All three routers must be running a distance-vector routing protocol.
Answer: C,D
NEW QUESTION 18
Refer to the exhibit. Which statement about this command is true?
- A. It must be configured on each PE router to enable the PE routers to receive multicast traffic for this particular MVRF.
- B. It is used to set the designated router on a link using PIM-SM.
- C. It is used to set the router that will server as the root bridge for STP.
- D. It must be configured on the PE and CE router to enable MP-BGP to send labels for CSC.
Answer: A
NEW QUESTION 19
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?
- A. L2VPN with the broadcast traffic processed at the ingress PE.
- B. L3VPN using a hierarchical topology of N-PEs and U-PEs.
- C. L2VPN by encapsulating multiple frame formats with interworking.
- D. L3VPN with direct LSP connectivity between all PEs.
Answer: B
NEW QUESTION 20
Which is the primary function of a MPLS L3 VPN route target?
- A. It imports the external routes it identifies into VRFs that support Internet traffic
- B. It uniquely identifies NLRIs that have the same numeric value.
- C. It supports QoS by classifying traffic by file type when it applies MPLS EXP bits to each packet.
- D. It imports and exports identified routes into selected VRFs.
Answer: D
NEW QUESTION 21
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. multicast from a leaf to another leaf
- B. known unicast from a leaf to another leaf
- C. known unicast from a root to another root
- D. unknown unicast from a leaf to another leaf
Answer: C
Explanation:
Reference: https://tools.ietf.org/html/draft-ietf-bess-evpn-etree-14
NEW QUESTION 22
Refer to the exhibit. Which statement about this output is true?
- A. The adjacent router is the egress LSR and has mpls ldp explicit-null configured.
- B. The adjacent LSR router configured mpls label range 0.
- C. The router IP 192.168.1.2 sent an implicit null, and the output is from the penultimate LSR.
- D. The zero in the second column is the normal behavior of an egress router LSR.
Answer: A
NEW QUESTION 23
Which two BGP attributes prevent loops in a route reflector environment? (Choose two.)
- A. origin
- B. local preference
- C. AS_PATH
- D. originator ID
- E. cluster ID
Answer: D,E
NEW QUESTION 24
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 Ethernet Auto-Discovery information.
- C. Type 2 routes contain MAC/IP information.
- D. Type 2 routes contain inclusive source-specific multicast route information.
- E. The operator adds in "host-routing" under the BVI651 interface.
Answer: C,E
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/vpn/61x/b-ncs5500-l2vpn-configuration- guide-61x/b-ncs5500-l2vpn-configuration-guide-61x_chapter_01010.html
NEW QUESTION 25
With Layer 3 MPLS VPN implementations on Cisco IOS XR PE routers, an interface is assigned to a VRF using the vrf command in which configuration mode?
- A. RP/0/RP0/CPU0:PE(config-bgp)#
- B. RP/0/RP0/CPU0:PE(config-vrf)#
- C. RP/0/RP0/CPU0:PE(config-if)#
- D. RP/0/RP0/CPU0:PE(config-bgp-af)#
Answer: C
Explanation:
Reference:
https://www.cisco.com/c/en/us/td/docs/ios_xr_sw/iosxr_r3-7/mpls/configuration/guide/gc37v3.html
NEW QUESTION 26
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. Change the rd value to 65001:65001 under the VRF section of the PE router.
- B. Configure the address-family ipv4 labeled-unicast command under the neighbor configuration of the CE router for the PE.
- C. Configure OSPF on the PE router.
- D. Configure static routing on the CE router.
Answer: C
NEW QUESTION 27
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. an attempt to configure a VRF Selection table that does not exist
- B. an attempt to configure a VRF instance on an interface that already has VRF Selection configured
- C. the entry of an inconsistent IP address and mask for VRF Selection
- D. an attempt to remove a VRF Selection entry that does not exist
Answer: D
NEW QUESTION 28
Refer to the exhibit.
What is the effect of this configuration?
- A. The mroute table is cleared.
- B. An LSP virtual interface tunnel is created.
- C. A Cisco MPLS TE tunnel is generated with 192.168.1.2 as the source IP address of router 1.
- D. Router 1 accepts multicast routes with a tag of 12:1
Answer: D
NEW QUESTION 29
When implementing VPLS on Cisco IOS XR routers, the VPLS PW neighbors can be statically defined under which configuration mode?
- A. vfi
- B. l2transport
- C. bridge-domain
- D. mpls ldp
- E. bridge group
Answer: A
NEW QUESTION 30
Refer to the exhibit.
An engineer is implementing an MPLS P2MP TE solution. Which type of router can serve as the midpoint router and the tailend router in this P2MP TE network implementation?
- A. transit
- B. bud
- C. source
- D. headend
Answer: B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/mpls/mp-te-path-setup- xe-3s-asr920-book/mp-te-path-setup-xe-3s-asr920-book_chapter_01.html
NEW QUESTION 31 
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. Change the rd value to 65001:65001 under the VRF section of the PE router.
- B. Configure the address-family ipv4 labeled-unicast command under the neighbor configuration of the CE router for the PE.
- C. Configure OSPF on the PE router.
- D. Configure static routing on the CE router.
Answer: C
Explanation:
Section: Layer 3 VPNs
NEW QUESTION 32
Refer to the exhibit.
Router 1 is a route reflector client within a service provider core PE1 cannot see VPNv4 routes received from the ASBR PE1 only has an iBGP relationship with Router 1. Which action resolves this issue?
- A. Configure PE1 to have an eBGP relationship with Router 1.
- B. Enable BGP default ipv4-unicast
- C. Activate PE1 as a neighbor under the IPv4 address family.
- D. Configure Router 1 as a route reflector for PE1 under the VPNv4 address family.
Answer: D
NEW QUESTION 33
You are writing the requirements for an MPLS L3VPN environment that uses MP-BGP between PE routers.
In this environment, route targets and route distinguishers need to be advertised between the PE routers.
Which three operations meet these requirements? (Choose three.)
- A. full mesh of EBGP sessions and partial mesh of IBGP sessions
- B. mandatory creation of PE-to-PE BGP sessions between the outgoing interface IP addresses
- C. full mesh of IBGP sessions
- D. creation of PE-to-PE BGP sessions between loopback IP addresses
- E. advertisement of standard communities, enabled on the PE-to-PE BGP neighbors
- F. advertisement of extended communities, enabled on the PE-to-PE BGP neighbors
Answer: C,D,F
Explanation:
Section: Layer 3 VPNs
NEW QUESTION 34
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