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NEW QUESTION # 113
Click the Exhibit button. Connections between hosts connected to Leaf-1 and Leaf-2 are not working correctly.
Referring to the exhibit, which two configuration changes are required to solve the problem?
(Choose two.)
Answer: A,D
Explanation:
Configure the set switch-options vrf-target target:65000:1 parameter on Leaf-2: The vrf- target parameter on Leaf-2 must match the vrf-target on Leaf-1 to ensure that both leaves use the same routing information for their respective VRFs. In the configuration, Leaf-1 has vrf-target target:65000:1, while Leaf-2 has vrf-target target:65000:2. These must be consistent to allow proper communication and routing between the leaves.
Configure the set switch-options service-id 1 parameter on Leaf-2: The service-id configuration should be consistent across all leaf nodes to ensure that they are part of the same VXLAN service. Leaf-1 is configured with service-id 1, so Leaf-2 should be configured with the same service-id 1 to ensure consistency in the VXLAN deployment.
NEW QUESTION # 114
Which two statements are correct about storm control in a Junos EVPN-VXLAN fabric? (Choose two.)
Answer: C,D
Explanation:
Storm control is a Layer 2 feature that monitors broadcast, unknown unicast, and multicast (BUM) traffic levels on an interface and takes a configured action, such as dropping excess traffic or disabling the interface, when a defined threshold is exceeded. This protects the fabric from broadcast storms but does not replace the Designated Forwarder election process, which handles duplicate BUM traffic delivery in multihomed scenarios.
NEW QUESTION # 115
You are using filter-based forwarding with a VXLAN overlay. What are two benefits in this scenario? (Choose two.)
Answer: B,D
Explanation:
Filter-based forwarding allows selective steering of specific traffic flows into different routing instances or service chains, enabling targeted inspection and policy enforcement for only the required flows. By redirecting only matched traffic instead of all traffic, it optimizes resource usage and avoids unnecessary processing, leading to more efficient utilization of network resources.
NEW QUESTION # 116
Exhibit.
Referring to the exhibit, when Host A sends an ARP request for Host B's IP address, which Junos feature does leaf1require to send an ARP response back to Host A without having to send a broadcast frame over the fabric?
Answer: D
Explanation:
* Scenario Overview:
* In the exhibit, Host A is trying to resolve Host B's IP address (10.10.1.2) through ARP (Address Resolution Protocol). Normally, an ARP request would be broadcasted over the network, and the host owning the IP address (Host B) would respond.
* Role of Proxy ARP:
* Option A:Proxy ARPallows a router or switch (in this case, leaf1) to respond to ARP requests on behalf of another host. Leaf1, knowing the MAC address of Host B through the EVPN MAC advertisement, can reply to Host A's ARP request directly without broadcasting the request across the entire network fabric. This feature reduces unnecessary traffic and increases network efficiency.
Conclusion:
* Option A:Correct-Proxy ARP enables leaf1 to respond to Host A's ARP request for Host B's IP without broadcasting over the IP fabric, thus providing the ARP response locally.
NEW QUESTION # 117
Exhibit.
A VXLAN tunnel has been created between leaf1and Ieaf2 in your data center. Referring to the exhibit, which statement is correct?
Answer: C
Explanation:
* Understanding VXLAN Tunneling:
* VXLAN (Virtual Extensible LAN) is a network virtualization technology that addresses the scalability issues associated with traditional VLANs. VXLAN encapsulates Ethernet frames in UDP, allowing Layer 2 connectivity to extend across Layer 3 networks.
* Each VXLAN network is identified by a unique VXLAN Network Identifier (VNI). In this exhibit, we have two VNIs, 5100 and 5200, assigned to the VXLAN tunnels between leaf1 and leaf2.
* Network Setup Details:
* Leaf1:Connected to Server1 with VLAN ID 100 and associated with VNI 5100.
* Leaf2:Connected to Server2 with VLAN ID 200 and associated with VNI 5200.
* Spine:Acts as the interconnect between leaf switches.
* Traffic Flow Analysis:
* When traffic is sent from Server1 to Server2, it is initially tagged with VLAN ID 100 on leaf1.
* The traffic is encapsulated into a VXLAN packet with VNI 5100 on leaf1.
* The packet is then sent across the network (via the spine) to leaf2.
* On leaf2, the VXLAN header is removed, and the original Ethernet frame is decapsulated.
* Leaf2 will then associate this traffic with VLAN ID 200 before forwarding it to Server2.
* Correct Interpretation of the Exhibit:
* The traffic originating from Server1, which is tagged with VLAN ID 100, will be encapsulated into VXLAN and transmitted to leaf2.
* Upon arrival at leaf2, it will be decapsulated, and since it is associated with VNI 5200 on leaf2, the traffic will be retagged with VLAN ID 200.
* Therefore, the traffic will reach Server2 tagged with VLAN ID 200, which matches the network configuration shown in the exhibit.
* Data Center References:
* This configuration is typical in data centers using VXLAN for network virtualization. It allows isolated Layer 2 segments (VLANs) to be stretched across Layer 3 boundaries while maintaining distinct VLAN IDs at each site.
* This approach is efficient for scaling large data center networks while avoiding VLAN ID exhaustion and enabling easier segmentation.
In summary, the correct behavior, as per the exhibit and the detailed explanation, is that traffic sent from Server1 will be tagged with VLAN ID 200 when it reaches Server2 via leaf2. This ensures proper traffic segmentation and handling across the VXLAN-enabled data center network.
NEW QUESTION # 118
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