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Free JN0-480 Exam Braindumps (page: 3)

Page 3 of 17
PDF with 65 Questions

Using the Juniper Apstra multitenancy capabilities, which approach will allow a tenant to interconnect two different routing zones?

  1. Interconnection is the default behavior.
  2. Use interconnection through the fabric spine nodes.
  3. Interconnection cannot be enabled.
  4. Use interconnection through an external gateway.

Answer(s): D

Explanation:

According to the Juniper documentation1, a routing zone is an L3 domain, the unit of tenancy in multi-tenant networks. You create routing zones for tenants to isolate their IP traffic from one another, thus enabling tenants to re-use IP subnets. In addition to being in its own VRF, each routing zone can be assigned its own DHCP relay server and external system connections. You can create one or more virtual networks within a routing zone, which means a tenant can stretch its L2 applications across multiple racks within its routing zone. For virtual networks with Layer 3 SVI, the SVI is associated with a Virtual Routing and Forwarding (VRF) instance for each routing zone isolating the virtual network SVI from other virtual network SVIs in other routing zones. If you're using multiple routing zones, external system connections must be from leaf switches in the fabric. Routing between routing zones must be accomplished with external systems. Therefore, the correct answer is
D. Use interconnection through an external gateway.


Reference:

Routing Zones



Exhibit.



In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Lead and Leat6 using the same virtual network identifier (VNI).
Which two statements are correct in this scenario? (Choose two.)

  1. The underlay must use IRB interfaces.
  2. The underlay must be provisioned with PIMv2.
  3. Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.
  4. The underlay EBGP peering's must be established between leaf and spine devices.

Answer(s): C,D

Explanation:

In the EVPN-VXLAN data center fabric bridged overlay architecture shown in the exhibit, the servers are connected to Leaf1 and Leaf6 using the same virtual network identifier (VNI). This means that the servers belong to the same Layer 2 domain and can communicate with each other using VXLAN

tunnels across the fabric. The underlay network provides the IP connectivity between the leaf and spine devices, and it uses EBGP as the routing protocol. Therefore, the following two statements are correct in this scenario:
Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices. This is because the loopback addresses are used as the source and destination IP addresses for the VXLAN tunnels, and they must be reachable by all the devices in the fabric. The loopback addresses are also used as the router IDs and the BGP peer addresses for the EBGP sessions. The underlay EBGP peering's must be established between leaf and spine devices. This is because the EBGP sessions are used to exchange the underlay routing information and the EVPN routes for the overlay network. The EBGP sessions are established using the loopback addresses of the devices, and they follow a spine-and-leaf topology, where each leaf device peers with all the spine devices, and each spine device peers with all the leaf devices.

The following two statements are incorrect in this scenario:
The underlay must use IRB interfaces. This is not true, because the underlay network does not provide any Layer 3 gateway functionality for the overlay network. The IRB interfaces are used to provide inter-VXLAN routing within the fabric, which is not the case in the bridged overlay architecture. The IRB interfaces are used in the edge-routed bridging (ERB) or the centrally-routed bridging (CRB) architectures, which are different from the bridged overlay architecture. The underlay must be provisioned with PIMv2. This is not true, because the underlay network does not use multicast for the VXLAN tunnels. The VXLAN tunnels are established using EVPN, which uses BGP to distribute the MAC and IP addresses of the end hosts and the VTEP information of the devices. EVPN eliminates the need for multicast in the underlay network, and it provides optimal forwarding and fast convergence for the overlay network.


Reference:

Exploring EVPN-VXLAN Overlay Architectures ­ Bridged Overlay EVPN LAGs in EVPN-VXLAN Reference Architectures
EVPN-VXLAN Configuration Guide



You are receiving cable, interface, and BGP anomalies from several devices within the data center fabric. In Juniper Apstr

  1. how would you troubleshoot these types of errors?
  2. In the Ul, go to Time Voyager and revert to the last working version.
  3. In the Ul, access the console to the devices and review the interface states.
  4. In the Ul, go to Devices and confirm that agent connectivity is fine.
  5. In the Ul, verify device connectivity by consulting the cable map.

Answer(s): D

Explanation:

The cable map is a graphical representation of the physical connections between the devices in the data center fabric. It shows the status of the cables, interfaces, and BGP sessions for each device. You can use the cable map to identify and troubleshoot any cable, interface, or BGP anomalies that may occur in the fabric. You can also filter the cable map by device name, device type, device role, device state, cable state, interface state, or BGP state12.


Reference:

Cable Map Overview
Cable Map User Guide



Exhibit.



Referring to the exhibit, what is the minimum information you must add to create a new routing zone?

  1. VRF Name only
  2. VRF Name and Routing policies
  3. VRF Name, VLAN ID. And VNI
  4. VRF Name, VLAN ID, VNI, Routing Policies

Answer(s): C

Explanation:

To create a new routing zone, you must specify the VRF Name, VLAN ID, and VNI for the routing zone. These are the mandatory fields in the user interface shown in the exhibit. The VRF Name is the name of the L3 domain that isolates the IP traffic of the routing zone from other routing zones. The VLAN ID is the identifier for the VLAN tagged Layer 3 links on external connections. The VNI is the VxLAN

Network Identifier associated with the routing zone. The Routing Policies are optional fields that allow you to configure import and export route targets for the routing zone. These are only applicable for EVPN routing zones, which use MP-EBGP as the overlay control protocol. The other options are incorrect because:
A) VRF Name only is wrong because you also need to specify the VLAN ID and VNI for the routing zone.
B) VRF Name and Routing policies is wrong because you also need to specify the VLAN ID and VNI for the routing zone. Routing policies are optional and only relevant for EVPN routing zones. D) VRF Name, VLAN ID, VNI, Routing Policies is wrong because Routing Policies are optional and not required to create a new routing zone.


Reference:

Routing Zones (Virtual)
Data Center Automation Using Juniper Apstra



Page 3 of 17



Post your Comments and Discuss Juniper JN0-480 exam with other Community members:

Sami commented on December 12, 2024
Shall i go for exam in 1 week Period?
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ric commented on October 08, 2024
is it still vaild?
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