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Nokia SR Linux EVPN and Data Center Interconnect Sample Questions:

1. An IRB sub-interface that is being used to interconnect a MAC-VRF to an IP-VRF, is configured with anycast-gw set to true and anycast-gw enabled.
Which of the following statements is FALSE?

A) The host IP address of the sub-interface appears in the IP-VRF route table along with the prefix for the entire sub-net.
B) The last octet of the default virtual MAC assigned to the sub-interface is derived from the last octet of the chassis MAC.
C) Two MAC addresses associated to the sub-interface are shown in the forwarding table of the MAC-VRF that contains the IRB sub-interface.
D) The same IP address used on this sub-interface can be used by other IRB sub-interfaces on remote PEs participating in the IP-VRF.

2. 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?

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

3. Consider the exhibit.

All three leafs have an EVPN MP-BGP session with the route reflector in Spine-1. Leaf-2 and Leaf-3 have existing instances of an L2 EVPN named MAC VRF-1. Leaf-1 has just enabled a new instance of MAC VRF-1.
Which of the following steps is NOT taken when this new instance is enabled?

A) Leaf-1 advertises the IMET route in a BGP EVPN update directly to Leaf-2 and Leaf-3.
B) Leaf-2 and Leaf-3 add Leaf-1 to their existing flooding list for BUM traffic.
C) Leaf-1 generates an IMET route.
D) Leaf-2 and Leaf-3 auto-discover the new peer based on the route target in the received IMET route.

4. Which of the following GARP functions is FALSE?

A) A host sends a GARP to update its own IP/MAC mapping to the other hosts in the subnet.
B) All other hosts within the subnet will update their ARP tables.
C) The other hosts in the subnet will acknowledge the receipt with a reply.
D) The GARP is sent as a broadcast.

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

A) The originating PE and the destination PE must synchronize their MAC tables.
B) A PE advertising a local MAC that was previously learned through EVPN, will decrement the sequence number in its update.
C) The originating PE generates a withdraw message after the same locally learned MAC has aged out.
D) The original PE advertises the locally learned MAC with the sequence number set to a maximum value.

Solutions: