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Cisco 300-410 Exam Questions
Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) (Page 25 )

Updated On: 12-Apr-2026
Page 25 of 125
PDF with 640 Questions

Refer to the exhibit.


An engineer must establish multipoint GRE tunnels between hub router R6 and branch routers R1, R2, and R3.

Which configuration accomplishes this task on R1?


  1. interface Tunnel 1
    ip address 192.168.1.1 255.255.255.0
    tunnel source e0/0
    tunnel mode gre multipoint
    ipnhrpnhs 192.168.1.6
    ipnhrp map 192.168.1.6 192.1.10.1
    ipnhrp map 192.168.1.2 192.1.20.2
    ipnhrp map 192.168.1.3 192.1.30.3

  2. interface Tunnel 1
    ip address 192.168.1.1 255.255.255.0
    tunnel source e0/1
    tunnel mode gre multipoint
    ipnhrpnhs 192.168.1.6
    ipnhrp map 192. 168.1.6 192.1.10.6

  3. interface Tunnel 1
    ip address 192. 168.1.1 255.255.255.0
    tunnel source e0/0
    tunnel mode gre multipoint
    ipnhrp network-id 1
    ipnhrpnhs 192.168.1.6
    ipnhrp map 192.168.1.6 192.1.10.6

  4. interface Tunnel 1
    ip address 192.168.1.1 255. 255.255.0
    tunnel source e0/1
    tunnel mode gre multipoint
    ipnhrp network-id 1
    ipnhrpnhs 192.168.1.6
    ipnhrp map 192.168.1.6 192.1.10.1
    ipnhrp map 192.168.1.2 192.1.20.2
    ipnhrp map 192.168.1.3 192.1.30.3

Answer(s): C



How is VPN routing information distributed in an MPLS network?

  1. The top level of the customer data packet directs it to the correct CE device.
  2. It is established using VPN IPsec peers.
  3. It is controlled through the use of RD.
  4. It is controlled using of VPN target communities.

Answer(s): D


Reference:

https://www.ccexpert.us/mpls-design/chapter-5-packetbased-mpls-vpns.html



IPv6 is enabled in the infrastructure to support customers with an IPv6 network over WAN and to connect the head office to branch offices in the local network. One of the customers is already running IPv6 and wants to enable IPv6 over the DMVPN network infrastructure between the headend and branch sites.

Which configuration command must be applied to establish an mGRE IPv6 tunnel neighborship?

  1. ipv6 nhrpholdtime 30
  2. tunnel mode gre multipoint ipv6
  3. ipv6 unicast-routing
  4. tunnel protection mode ipv6

Answer(s): B


Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/interface/configuration/xe-16/ir-xe-16-book/ip6-mgre-tunls.pdf



What is a characteristic of Layer 3 MPLS VPNs?

  1. Traffic engineering capabilities provide QoS and SLAs.
  2. Traffic engineering supports multiple IGP instances.
  3. LSP signaling requires the use of unnumbered IP links for traffic engineering.
  4. Authentication is performed by using digital certificates or preshared keys.

Answer(s): A


Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-te-diffserv-aw.html



How does an MPLS Layer 3 VPN differentiate the IP address space used between each VPN?

  1. by RT
  2. by address family
  3. by RD
  4. by MP-BGP

Answer(s): C



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