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NEW QUESTION # 24
Referring to the exhibit, which statement is true?
Answer: C
Explanation:
The configuration provided in the exhibit indicates an EVPN-VXLAN setup with routing instances, VLANs, and associated VXLANs. Specifically, there are routing instances with IRB interfaces (Integrated Routing and Bridging) and associated VLANs, as well as VNI assignments, which are key elements in an Enhanced Routed Bridging (ERB) architecture. This architecture supports both Layer 2 and Layer 3 connectivity with VXLAN for bridging and routing.
NEW QUESTION # 25
Exhibit.
Referring to the exhibit, Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) in a data center that uses an ERB architecture. What do you determine from the output?
Answer: D
Explanation:
Understanding the Problem:
* Host1 (10.1.1.1) is failing to communicate with Host2 (10.1.2.1) within an EVPN-VXLAN environment using ERB architecture.
Analysis of the Exhibit:
* The provided output includes information from the show route forwarding-table matching command for IP 10.1.2.1. The next hop is shown as vtep.32769, which indicates that the traffic destined for 10.1.2.1 is being forwarded into the VXLAN tunnel with the correct VTEP (VXLAN Tunnel Endpoint).
Conclusion:
* Option B:Correct-The traffic from Host1 is entering the VXLAN tunnel, as evidenced by the next hop pointing to a VTEP. However, the issue could lie elsewhere, possibly with the remote VTEP, routing configurations, or the receiving leaf/spine devices.
NEW QUESTION # 26
You want to ensure that VXLAN traffic from the xe-0/0/12 interface is being encapsulated by logical vtep.32770 and sent to a remote leaf device.
In this scenario, which command would you use to verify that traffic is flowing?
Answer: C
Explanation:
show interfaces vtep.32770 detail: This command shows detailed counters, including encapsulation and decapsulation statistics, allowing you to confirm that VXLAN traffic is being encapsulated and forwarded through the VTEP interface.
https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/command/show-interfaces-detail.html
NEW QUESTION # 27
You are configuring an EVPN-VXLAN fabric with an edge-routed bridging (ERB) overlay. Where does Layer 3 routing occur in this architecture?
Answer: A
Explanation:
In an edge-routed bridging (ERB) overlay, the integrated routing and bridging (IRB) interfaces and Layer 3 gateway functionality are placed directly on the server leaf devices, moving routing as close to the endpoints as possible. This reduces the need to hairpin traffic through the spine and improves east-west traffic efficiency compared to a centrally-routed bridging (CRB) design.
NEW QUESTION # 28
Exhibit.
You have implemented an EVPN-VXLAN data center. Device served must be able to communicate with device server2.
Referring to the exhibit, which two statements are correct? (Choose two.)
Answer: A,B
Explanation:
* Understanding the Exhibit Setup:
* The network diagram shows an EVPN-VXLAN setup, a common design for modern data centers enabling Layer 2 and Layer 3 services over an IP fabric.
* Leaf1 and Leaf2 are the leaf switches connected to Server1 and Server2, respectively, with each server in a different subnet (172.16.1.0/24 and 172.16.2.0/24).
* Spine1 and Spine2 are part of the IP fabric, interconnecting the leaf switches.
* EVPN-VXLAN Basics:
* EVPN (Ethernet VPN) provides Layer 2 and Layer 3 VPN services using MP-BGP.
* VXLAN (Virtual Extensible LAN) encapsulates Layer 2 frames into Layer 3 packets for transmission across an IP network.
* VTEP (VXLAN Tunnel Endpoint) interfaces on leaf devices handle VXLAN encapsulation and decapsulation.
* Integrated Routing and Bridging (IRB):
* IRB interfaces are required on leaf1 and leaf2 (where the endpoints are directly connected) to route between different subnets (in this case, between 172.16.1.0/24 and 172.16.2.0/24).
* The IRB interfaces provide the necessary L3 gateway functions for inter-subnet communication.
* Traffic Flow Analysis:
* Traffic from Server1 (172.16.1.1) destined for Server2 (172.16.2.1) must traverse from leaf1 to leaf2.
* The traffic will be VXLAN encapsulated on leaf1, sent over the IP fabric, and decapsulated on leaf2.
* Since the communication is between different subnets, the IRB interfaces on leaf1 and leaf2 are crucial for routing the traffic correctly.
* Correct Statements:
* C. An IRB Interface must be configured on leaf1 and leaf2:This is necessary to perform the inter-subnet routing for traffic between Server1 and Server2.
* D. Traffic from server1 to server2 will transit the VXLAN tunnel between leaf1 and leaf2:
This describes the correct VXLAN operation where the traffic is encapsulated by leaf1 and decapsulated by leaf2.
Data Center References:
* In EVPN-VXLAN architectures, the leaf switches often handle both Layer 2 switching and Layer 3 routing via IRB interfaces. This allows for efficient routing within the data center fabric without the need to involve the spine switches for every routing decision.
* The described traffic flow aligns with standard EVPN-VXLAN designs, where direct VXLAN tunnels between leaf switches enable seamless and scalable communication across a data center network.
NEW QUESTION # 29
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