Cisco Implementing Enterprise Advanced Routing and Services (ENARSI) 300-410 Dumps in PDF

Free Cisco 300-410 Real Questions (page: 12)

What are two functions of MPLS Layer 3 VPNs? (Choose two.)

  1. It is used for transparent point-to-multipoint connectivity between Ethernet links/sites.
  2. A packet with node segment ID is forwarded along with shortest path to destination.
  3. Customer traffic is encapsulated in a VPN label when it is forwarded in MPLS network.
  4. BGP is used for signaling customer VPNv4 routes between PE nodes.
  5. LDP and BGP can be used for Pseudowire signaling.

Answer(s): C,D



What are two MPLS label characteristics (Choose two.)

  1. The label edge router swaps labels on the received packets.
  2. Labels are imposed in packets after the Layer 3 header.
  3. LDP uses TCP for reliable delivery of information.
  4. An MPLS label is a short identifier that identifies a forwarding equivalence class.
  5. A maximum of two labels can be imposed on an MPLS packet.

Answer(s): C,D



Which command allows traffic to load-balance in an MPLS Layer 3 VPN configuration?

  1. multi-paths eibgp 2
  2. maximum-paths 2
  3. maximum-paths ibgp 2
  4. multi-paths 2

Answer(s): C


Reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-os/mpls/configuration/guide/mpls_cg/mp_vpn_multipath.html



Refer to the exhibit. After applying IPsec, the engineer observed that the DMVPN tunnel went down, and both spoke-to-spoke and hub were not establishing. Which two actions resolve the issue? (Choose two.)

  1. Change the mode from mode tunnel to mode transport on R3.
  2. Remove the crypto isakmp key cisco address 10.1.1.1 on R2 and R3.
  3. Configure the crypto isakmp key cisco address 192.1.1.1 on R2 and R3.
  4. Configure the crypto isakmp key cisco address 0.0.0.0 on R2 and R3.
  5. Change the mode from mode transport to mode tunnel on R2.

Answer(s): A,D



Which statement about route distinguishers in an MPLS network is true?

  1. Route distinguishers allow multiple instances of a routing table to coexist within the edge router.
  2. Route distinguishers are used for label bindings.
  3. Route distinguishers make a unique VPNv4 address across the MPLS network.
  4. Route distinguishers define which prefixes are imported and exported on the edge router.

Answer(s): C



Which statement about MPLS LDP router ID is true?

  1. If not configured, the operational physical interface is chosen as the router ID even if a loopback is configured.
  2. The loopback with the highest IP address is selected as the router ID.
  3. The MPLS LDP router ID must match the IGP router ID.
  4. The force keyword changes the router ID to the specified address without causing any impact.

Answer(s): B


Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/12-4m/mp-ldp-12-4m-book.pdf



Refer to the exhibit. Which interface configuration must be configured on the spoke A router to enable a dynamic DMVPN tunnel with the spoke B router?





Answer(s): B



Which list defines the contents of an MPLS label?

  1. 20-bit label; 3-bit traffic class; 1-bit bottom stack; 8-bit TTL
  2. 32-bit label; 3-bit traffic class; 1-bit bottom stack; 8-bit TTL
  3. 20-bit label; 3-bit flow label; 1-bit bottom stack; 8-bit hop limit
  4. 32-bit label; 3-bit flow label; 1-bit bottom stack; 8-bit hop limit

Answer(s): A


Reference:

https://tools.ietf.org/html/rfc5462



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