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| Section | Objectives |
|---|---|
| EVPN-VXLAN Technologies | - EVPN control plane fundamentals - EVPN Type 2 and Type 5 routes - VXLAN data plane encapsulation |
| Automation and Programmability | - Network configuration consistency and automation concepts - Junos automation basics (scripts, commit scripts) |
| Junos Data Center Switching | - Spanning Tree and alternatives in DC designs - VLANs, trunking, and bridging concepts - QFX switch configuration and operation |
| Operations and Troubleshooting | - Troubleshooting routing and switching issues - Monitoring and verifying EVPN-VXLAN fabrics |
| Data Center Architecture Fundamentals | - Spine-leaf (Clos) architecture design - Redundancy and high availability principles - Layer 2 and Layer 3 data center fabric concepts |
| Data Center Routing Protocols | - OSPF and IS-IS in data center environments - BGP in EVPN-based fabrics - Underlay vs overlay network design |
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NEW QUESTION # 64
What is the purpose of an interface map in Juniper Apstra?
Answer: D
Explanation:
According to the Juniper documentation1, an interface map is a configuration template that maps interfaces between logical devices and physical hardware devices (represented with device profiles) while adhering to vendor specifications. An interface map specifies a connection between the interfaces of two devices, such as a leaf and a spine, a leaf and a server, or a leaf and an external gateway. An interface map can also specify port transformations, such as breaking out a 40 GbE port into four 10 GbE ports, or disabling unused ports. An interface map can be used to achieve the intended network configuration rendering and to enable features such as LAG, ESI-LAG, or MLAG. Therefore, the correct answer is B. An interface map specifies a connection between the interfaces of two devices. Reference: Interface Maps (Datacenter Design)
NEW QUESTION # 65
You are considering the bridged overlay EVPN-VXLAN architecture. In this scenario, how many VLANs would be enabled in the VLAN-based service type at the MAC-VRF EVPN instance level?
Answer: C
Explanation:
In Junos EVPN, the service type determines how VLANs (broadcast domains) are mapped into EVPN constructs. With VLAN-based service, the mapping is one-to-one: a single VLAN (single broadcast domain) maps to a single EVPN instance (EVI), resulting in a separate bridge table per VLAN. When you implement EVPN-VXLAN in a bridged overlay (L2 extension over an L3 underlay), leaf devices act as VTEPs and encapsulate VLAN traffic into VXLAN using the associated VNI, but the service-type mapping rule still applies.
At the MAC-VRF hierarchy, you configure the EVPN-VXLAN parameters and choose the service type for that EVPN instance. If the service type selected is VLAN-based, then the EVI represents exactly one VLAN at that EVPN instance level. If you need multiple VLANs under the same MAC-VRF/EVI construct, Junos provides alternative service types (for example, VLAN-aware or VLAN-bundle) specifically intended to associate multiple VLANs with a single EVPN instance; that is not what VLAN-based service does.
Therefore, in a bridged overlay EVPN-VXLAN design using VLAN-based service at the MAC-VRF EVPN instance level, the correct answer is one VLAN. This remains true regardless of how many total VLANs exist across the fabric; each VLAN-based EVI handles a single VLAN.
Verified Juniper sources (URLs):
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/evpn-based-services.html
https://www.juniper.net/documentation/us/en/software/junos/evpn/topics/concept/mac-vrf-routing-instance-overview.html
NEW QUESTION # 66
Which Root Cause Identifier is currently supported in Juniper Apstra software?
Answer: A
Explanation:
As of current Juniper Apstra software capabilities, the only supported Root Cause Identifier (RCI) is BGP. The RCI feature analyzes control-plane anomalies to identify and highlight the root cause of BGP-related issues within the fabric, helping operators quickly pinpoint failures or misconfigurations.
NEW QUESTION # 67
Which two statements about ESI values are correct for the server connections to the fabric shown in the exhibit? (Choose two.)
Answer: A,D
Explanation:
To answer this question, we need to understand the concept of ESI values in EVPN LAGs. An ESI is a 10-byte value that identifies an Ethernet segment, which is a set of links that connect a multihomed device (such as a server) to one or more PE devices (such as leaf switches) in an EVPN network. The same ESI value must be configured on all the PE devices that connect to the same Ethernet segment. This allows the PE devices to form an EVPN LAG, which supports active-active or active-standby multihoming for the device. The ESI value can be manually configured (type 0) or automatically derived from LACP (type 1) or other methods. In the exhibit, Server A is connected to two leaf switches (QFX 5210) using a LAG with LACP enabled. Server B is connected to three leaf switches (QFX 5120) using a LAG with LACP enabled.
NEW QUESTION # 68
You want to route between tenants in a multitenant environment in Juniper Apstra.
What are two ways to accomplish this task? (Choose two.)
Answer: A,D
Explanation:
You can route between VRFs on a VTEP-enabled device (such as a border leaf), enabling inter- VRF communication within the fabric.
You can also use an external device, such as a firewall or external router, to perform inter-tenant routing when routing must occur outside the fabric.
NEW QUESTION # 69
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