Verified 4A0-D03 &As - Provide 4A0-D03 with Correct Answers [Q32-Q55]

Q32. Which of the following statements about MAC mobility is TRUE?

The original PE advertises the locally learned MAC with the sequence number set to a maximum value.

A PE advertising a local MAC that was previously learned through EVPN, will decrement the sequence number in its update.

The originating PE generates a withdraw message after the same locally learned MAC has aged out.

The originating PE and the destination PE must synchronize their MAC tables.

Q33. When configuring the EVPN MP-BGP route reflector sessions between the leaf and spine routers, which of the following statements is TRUE?

The local-AS number configured within the BGP group will override the AS number configured directly under the BGP protocol.

The cluster-id that uniquely identifies this route reflector session is configured on the route reflector and participating clients.

When redundant route reflectors are deployed, one route reflector will be the primary while the other one will assume a backup role.

Route reflectors can be used instead of a full mesh of eBGP sessions between the leaf and spine routers.

Q34. Consider the exhibit.

Host-2 is sending data to Host-1. The network is designed to use asymmetric routing.
Which of the following statements about the operation of the data plane is TRUE?

Leaf-1 forwards the data for mac-vrf-2 towards Leaf-2 with a VNI of 2.

Leaf-2 forwards the data for mac-vrf-2 towards the IP-VRF using its IRB interface.

Leaf-2 IP-VRF consults the ARP table to learn Host-1 MAC address.

Leaf-2 does a MAC look-up using mac-vrf-1 and forwards the data towards Host-1.

Q35. Consider the exhibit.

Leaf-1 has received an ARP request from host-1 for host-2. Leaf-1 has added host-1’s MAC address in its MAC table and host-1’s MAC/IP addresses in its proxy-ARP table.
Which of the following steps is FALSE?

Leaf-1 sends a route-type 2 EVPN update with host-1’s MAC with the IP address set to 0.0.0.0 to the remote peers.

Leaf-1 sends a route-type 2 EVPN update with host-1’s MAC with the IP address set to 192.168.100.1 to the remote peers.

The remote peers ignore the EVPN update with the IP address set to 0.0.0.0 and use the update with the IP address set to 192.168.100.1 to populate their MAC forwarding tables.

The remote peers generate a gratuitous ARP towards their directly connected hosts to announce the learned IP/MAC mapping information.

Q36. Consider the exhibit.

All three of the leafs have a MP-BGP EVPN session to the route-reflector Spine-1. Leaf-1, Leaf-2 and Leaf-3 have existing instances of an L2 EVPN named MAC VRF-1. Host-1 has just sent its first Ethernet frame into MAC VRF-1 on Leaf-1.
Which of the following steps is FALSE?

Leaf-1 populates Host-1’s MAC address learnt on the local interface to its MAC table.

Leaf-1 generates an EVPN route-type 5 update with Host-1’s MAC address and sends it to the route reflector.

The route-reflector forwards the EVPN update to Leaf-2 and Leaf-3.

Leaf-2 and Leaf-3 import the EVPN update based upon the route target.

Q37. Which of the following is always found in an extended community associated with an EVPN update?

The route target

The AFI/SAFI

The VXLAN network ID

The EVPN route type

Q38. Which of the following EVPN route-types is used to implement aliasing?

Ethernet segment routes

AD per ES routes

AD per EVI routes

IP/MAC routes

Q39. Which of the following statements about the gateway-less data center interconnect solution is FALSE?

It provides a clear demarcation for security between the border leaf and gateway.

All of the data centers leaf routers must be reachable over the WAN network.

The route reflectors must be reachable between different data centers.

The data center border leaf and gateway can use either eBGP or static routes to exchange routing information.

Q40. Which of the following EVPN route-types is used to implement aliasing?

Ethernet segment routes

AD per EVI routes

AD per ES routes

IP/MAC routes

Q41. Which of the following statements about utilizing asymmetric routing in an L3 EVPN network is FALSE?

If a host interface’s has two IP addresses, it must send out two separate EVPN route-type 2 updates for the MAC-VRF.

Each PE must have a full ARP table for all of the hosts in the L3 EVPN network.

All the MAC-VRFs connected to the L3 EVPN network must exist on each PE.

The ingress and egress PE routers will perform both MAC and IP forwarding.

Q42. Which of the following statements about the decoupled gateway-based data center interconnect solution is FALSE?

VLAN tags are used to identify traffic between the data center border leaf and the WAN PE.

The EVPN services in the data center are interconnected to different VPN services in the WAN.

The separation between the border leaf and the WAN PE provides a clear demarcation for security and QoS.

The WAN PE maintains a peering session with the data center route-reflector for the exchange of updates.

Q43. Which of the following statements describes the function or operation of the integrated gateway-based data center interconnect solution?

All the data center leaf routers must be reachable over the WAN network.

The route reflectors in the different data centers must be able to reach each other.

The VXLAN tunnels are required between the leaf routers in the different data centers.

The data center gateway and the WAN PE functions are performed on a single router.

Q44. A host is connected to multiple PEs through multi-homing.
Which of the following is NOT a function of the EVPN route-type 4 route?

Allows the other PEs to discover which PEs are connected to the same Ethernet segment.

Identifies the redundancy mode of the Ethernet segment.

Identifies the type of algorithm to be used in the election process.

Triggers the election of a designated forwarder.

Q45. Leaf routers are configured to support Layer 2 multi-homing all-active mode.
Which of the following statements is FALSE?

All of the sub-interfaces of the LAG must be configured in the Ethernet segment.

The 2nd through 7th octets of the ESI must not be all zeros.

The multi-homing mode of all-active must be configured for the Ethernet segment.

The Ethernet segment must be administratively enabled.

Q46. Consider the exhibit.

Which of the following statements is FALSE?

The remote host’s IP address is 100.0.2.3.

The MAC address 00:00:00:00:00:01 was learned through the data plane.

The MAC address associated to the vxlan-interface will not age out.

The VXLAN network identifier configured for this MAC-VRF is 100.

Q47. Leaf routers are configured to support Layer 2 multi-homing all-active mode.
Which of the following statements is FALSE?

A LAG must be configured on the participating leaf routers.

If VLAN tagging is to be used, then it must be enabled on the LAG interface.

If using LACP, the system-id-mac must uniquely identify each leaf router connected to the host.

The LAG interface must then be associated with the Ethernet segment.

Q48. Which of the following statements about utilizing asymmetric routing in an L3 EVPN network is FALSE?

The ingress PE performs both MAC and IP forwarding.

The egress PE performs MAC forwarding only.

EVPN route-type 5 must be supported by the PEs involved.

Each MAC-VRF used in the L3 EVPN network must exist on each PE.

Q49. When providing L3 multi-homing on two or more leaf routers, which of the following is FALSE?

In a single-active multi-homing scenario, the DF-election is used to identify the active leaf router.

In an all-active multi-homing scenario, the DF-election is used to identify the leaf router that is responsible for forwarding BUM traffic to the host.

All learned 3rd party prefixes are advertised using EVPN route type 5.

The Ethernet segment is associated with the next-hop for the 3rd party prefixes.

Q50. Consider the exhibit.

Which of the following is NOT configured on dcgw10 to support the Layer 3 VPN connectivity?

The base BGP instance to support vpn-ipv4 and evpn address families.

A routed VXLAN interface for the VPRN instance.

A binding of the VPRN instance to the MPLS tunnels towards dcgw20.

A vrf-target matching the vrf-target on dcgw20 in the VPRN instance.

Q51. e-BGP is used as the routing protocol in the data center underlay.
When configuring the EVPN MP-BGP route reflector sessions, which of the following statements is FALSE?

The cluster-id that uniquely identifies the route reflector is only configured on the route reflector itself.

The leaf’s underlay autonomous system number is used for the route reflector EVPN peering sessions.

A second route reflector can be deployed for redundancy purposes.

If redundant route reflectors are deployed, the client leaf routers will receive duplicated updates.

Q52. Which of the following statements about utilizing VXLAN for the data plane in the data center is FALSE?

It allows the creation of a Layer 2 overlay network that can span the entire data center.

VXLAN was developed to support EVPN networks in the data center.

It may use ECMP to provide efficient utilization of the underlay interfaces within the data center.

It has the capability to isolate up to 16 million different overlays.

Q53. A host is connected to a MAC-VRF on leaf1 and leaf2. The MAC-VRF interfaces on leaf1 and leaf2 are associated to an Ethernet segment configured for active-standby multi-homing.
Which of the following statements is FALSE?

Leaf1 and leaf2 will hold an election to identify which leaf router will be the DF for the MAC-VRF.

Only the DF will accept traffic from the host.

The DF will forward all BUM traffic from the remote PEs to the host.

The non-DF is capable of forwarding unicast traffic from the remote PEs to the host.

Q54. When PEs are connected to an Ethernet segment with at least one active MAC-VRF, which of the following statements about the AD per EVI updates sent by a PE is FALSE?

It contains the VNI information that is to be used in the data plane.

It contains the multi-homing type used for the Ethernet segment.

It contains the route-target so that the update can be imported into the correct MAC-VRF instance.

A PE will advertise one AD per EVI update for each MAC-VRF associated to the Ethernet segment.

Verified 4A0-D03 &As – Provide 4A0-D03 with Correct Answers [Q32-Q55]

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