JNCIP-ENT · domain
EVPN
This domain covers EVPN on Juniper devices running Junos OS: EVPN route types, VNI-to-bridge-domain mapping, Ethernet segment multihoming with Designated Forwarder election, MAC mobility, and ingress replication for BUM traffic. Questions test configuration placement in Junos hierarchies and how control-plane routes drive data-plane forwarding behavior.
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What to know about EVPN
Be able to identify EVPN route types and their functions, configure VNI-to-bridge-domain mapping, and explain DF election and MAC mobility. The critical point is knowing which route type handles BUM ingress replication versus multihoming signaling.
EVPN route types 1-4 and their roles, including Type 3 for ingress replication lists
Designated Forwarder election on multihomed Ethernet segments using ESI and DF election
Mapping VNIs to bridge domains within an EVPN instance in Junos configuration
EVPN MAC mobility operation, sequence numbers, and duplicate MAC detection behavior
Watch out for
Common EVPN exam traps
- ▸Confusing Type 3 Inclusive Multicast Ethernet Tag routes with Type 4 Ethernet Segment routes when identifying ingress replication sources.
- ▸Placing VNI-to-bridge-domain mapping in the wrong Junos hierarchy instead of under the EVPN instance or bridge domain configuration.
- ▸Assuming DF election is based only on IP address, ignoring the role of ESI, election algorithm, and DF preference values.
Question index
All EVPN questions (38)
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Which TWO factors can cause an EVPN instance on a Junos device to fail in importing incoming Type-2 MAC/IP routes? (Choose two)
Medium2You are deploying an EVPN-VXLAN fabric on Juniper MX Series routers. Host A is attached to a leaf device and its MAC address is learned locally. You need to ensure that this MAC is advertised to all other leaf devices in the same EVPN instance so they can forward traffic to Host A without flooding. Which EVPN route type should you verify is being generated and advertised?
Medium3An engineer is troubleshooting a newly configured EVPN-VXLAN multi-homed setup where the Designated Forwarder (DF) is constantly toggling between two PE routers. What is the most likely cause of this DF churn?
Medium4You are configuring an EVPN-VXLAN fabric on Juniper devices and need to enable ARP suppression to reduce broadcast traffic. Which statement correctly describes how ARP suppression works in this environment?
Medium5Which THREE of the following statements describe the behavior and purpose of EVPN Route Type 5 (IP Prefix Route)? (Choose three)
Hard6When designing an EVPN-VXLAN fabric with integrated routing and bridging (IRB), which THREE considerations are critical for proper inter-subnet forwarding across VTEPs? (Choose three)
Hard7An administrator configures EVPN with VXLAN encapsulation and wants to ensure that interfaces assigned to bridge domains drop frames whose source MAC address is not learned or is unauthorized. Which feature should be enabled?
Medium8Which EVPN route type is responsible for advertising MAC addresses combined with IP addresses (MAC/IP Advertisement Route)?
Easy9You are analyzing BGP EVPN updates and observe an Extended Community attached to a Type-2 route containing a sequence number. What is the primary function of this MAC Mobility Extended Community?
Hard10You are configuring an EVPN-VXLAN fabric with a distributed gateway (anycast gateway) to optimize routing for hosts in different subnets. You need to ensure that the distributed gateway functions correctly. Which TWO statements are true about the distributed gateway implementation on Juniper devices? (Choose two.)
Hard11Which TWO of the following statements regarding EVPN Route Type 1 (Ethernet Auto-Discovery Route) are correct? (Choose two)
Hard12You are troubleshooting an EVPN-VXLAN fabric where a host connected to a multi-homed Ethernet segment is not receiving traffic from a remote PE. The remote PE has learned the host's MAC address via EVPN Type 2 routes. You suspect an issue with the Designated Forwarder (DF) election. Which command would you use on the local PE to verify the DF election state for the Ethernet segment?
Hard13Which command allows an operator to view the local and remote MAC addresses learned via EVPN control plane and data plane across all bridge domains on an MX Series router?
Easy14An administrator is deploying EVPN multi-homing with all-active mode on an MX Series router. Which configuration element uniquely identifies the provider edge (PE) router's attachment circuit to an Ethernet segment?
Medium15You are troubleshooting an EVPN-VXLAN fabric where a host behind Leaf 1 is unable to communicate with a host behind Leaf 2, even though both hosts are in the same VLAN and EVPN instance. You verify that Type 2 routes are being exchanged, but traffic is not forwarded. You suspect an issue with the VXLAN tunnel. Which Junos command would you use to check the status of the VXLAN tunnel interface and its associated VTEP?
Hard16Which specific EVPN route type is responsible for carrying IP prefix routes, often used for inter-subnet forwarding in an IP-VRF-to-EVPN integration scenario?
Easy17You are deploying an EVPN-VXLAN fabric on Juniper switches with a multi-homed server connected to two leaf switches in an all-active configuration. The server's MAC address is learned locally on both leaf switches. Which mechanism ensures that only one leaf switch forwards BUM traffic to the server, while both can forward known unicast traffic?
Hard18You are configuring an EVPN-VXLAN fabric on Juniper switches. A leaf switch needs to advertise its local VXLAN Tunnel Endpoint (VTEP) address to remote VTEPs so they can establish VXLAN tunnels. Which EVPN route type is used to advertise the VTEP IP address and support BUM traffic replication?
Medium19You are setting up a new EVPN-VXLAN fabric on Juniper switches. You need to configure the BGP session between two PE routers to exchange EVPN routes. Which BGP configuration is required to enable the EVPN address family on the session?
Easy20You are troubleshooting an EVPN-VXLAN network where a Juniper MX Series router is acting as a PE. You notice that traffic from a local host to a remote host is being dropped, even though the remote host's MAC address is present in the EVPN database. The BGP EVPN session is up, and Type-2 routes are exchanged. Which of the following is the most likely cause?
Hard21You are designing an EVPN network with active-active multi-homing. A host sends traffic to a multi-homed PE. The PE receives the traffic on a designated link. How does EVPN suppress unnecessary flooding across the core for unknown unicast traffic originating from a multi-homed site?
Hard22An engineer is verifying MAC learning behavior in an EVPN instance. A remote host's MAC address is learned via BGP Type 2 routes, but when the local host sends traffic to it, the packet drops. The engineer runs 'show route table bgp.evpn.0' and sees the route. What is the most likely reason the packet is dropping in the data plane?
Medium23Which THREE parameters are typically included or evaluated when configuring and verifying BGP EVPN peer sessions on Junos OS devices? (Choose three)
Medium24Which EVPN route type is responsible for establishing ingress replication lists for Broadcast, Unknown Unicast, and Multicast (BUM) traffic?
Easy25Which THREE actions occur during the EVPN Designated Forwarder (DF) election process on a multi-homed Ethernet segment? (Choose three)
Hard26You are configuring an EVPN-VXLAN fabric on Juniper devices. You want to enable the exchange of EVPN routes between PE routers. Which BGP configuration is required on each PE to support EVPN signaling?
Medium27Which Junos configuration hierarchy is used to define an EVPN routing instance of type 'evpn'?
Easy28When troubleshooting EVPN control plane connectivity in Junos OS, which THREE commands provide essential diagnostic information regarding EVPN routing tables and peers? (Choose three)
Medium29You are deploying an EVPN-VXLAN fabric with a pair of Juniper EX Series switches acting as leaf devices for a dual-homed server. The server is connected to both leaf switches using a LAG with LACP, and you want to achieve All-Active multihoming so that both leaf switches can forward traffic to and from the server simultaneously. Which statement correctly describes the role of the Designated Forwarder (DF) in this scenario?
Medium30You are integrating an EVPN-VXLAN fabric with an existing MPLS L3VPN backbone using a data center gateway. Which route type allows seamless translation and communication of prefix routes between the EVPN instance and the IP-VRF MPLS VPN backbone?
Hard31When configuring centralized gateway or distributed gateway routing models in an EVPN-VXLAN environment, how does a distributed gateway using Integrated Routing and Bridging (IRB) interfaces operate regarding default gateway functionality?
Hard32When configuring EVPN multi-homing in all-active mode, which THREE key components or concepts must be properly established across the PE routers? (Choose three)
Medium33Which BGP address family must be enabled under the BGP neighbor configuration to exchange EVPN routes between PE routers?
Easy34You are configuring an EVPN-VXLAN fabric on Juniper devices. You need to ensure that the underlay network supports the VXLAN data plane and that BUM traffic is efficiently handled. Which two statements are correct about the VXLAN tunnel endpoint (VTEP) configuration on Junos? (Choose two.)
Medium35Which TWO of the following statements accurately describe EVPN Route Type 2 (MAC/IP Advertisement Route)? (Choose two)
Hard36An engineer configures an EVPN instance with multiple bridge domains. Each bridge domain requires a unique VNI. Where are the VNI values mapped to their respective bridge domains in Junos OS?
Medium37Which TWO of the following statements correctly describe the operation and benefits of EVPN MAC mobility? (Choose two)
Medium38An administrator notices that broadcast, unknown unicast, and multicast (BUM) traffic sent from a local host is looping back to the originating multi-homed PE when using an all-active Ethernet segment. Which mechanism prevents this loop in EVPN?
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Frequently asked questions
- What does the EVPN domain cover on the JNCIP-ENT exam?
- Be able to identify EVPN route types and their functions, configure VNI-to-bridge-domain mapping, and explain DF election and MAC mobility. The critical point is knowing which route type handles BUM ingress replication versus multihoming signaling.
- How many questions are in this domain?
- This page lists all 38 EVPN questions in the JNCIP-ENT question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
- What is the best way to practise this domain?
- Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
- Can I practise only EVPN questions?
- Yes — the session launcher on this page filters questions to this domain only. Choose any session length for inline explanations and scoring.