Data Center, Specialist Exam Questions PDF download

QUESTION: 6

In the Juniper Apstra design phase, which object dictates port count, port speed, and how the ports would be used?

logical devices
rack type
network devices
interface map

Answer(s): D

Explanation:

Interface maps are objects that map interfaces between logical devices and physical hardware devices in the Juniper Apstra design phase. They dictate port count, port speed, and how the ports would be used for achieving the intended network configuration rendering. Interface maps also allow you to select device ports, transformations, and interfaces, provision breakout ports, and disable unused ports. For more information, see Interface Maps (Datacenter Design).

Reference:

Interface Maps (Datacenter Design)
Design
Interface Maps Introduction

Reveal Solution Next Question

QUESTION: 7

You want to keep virtual networks isolated from each other within the Juniper Apstra system. In this scenario, what are three ways to accomplish this task? (Choose three.)

Disable IPv4 connectivity when creating the virtual network within the same Routing Zone.
Enable Security Policy for virtual networks in the same Routing Zone.
Disable Route Target exports when creating the Routing Zones.
Use Connectivity Templates to block access within the same Routing Zone.
Put each network in different Routing Zones.

Answer(s): B,D,E

Explanation:

To keep virtual networks isolated from each other within the Juniper Apstra system, you can use one or more of the following methods:
Enable Security Policy for virtual networks in the same Routing Zone. This allows you to define rules that control the traffic flow between different virtual networks within the same routing zone. You can specify the source and destination virtual networks, the protocol, the port, and the action (allow or deny) for each rule. The security policy is applied on the ingress interface of the leaf devices1. Use Connectivity Templates to block access within the same Routing Zone. This allows you to customize the connectivity between different racks within the same routing zone. You can create templates that define the link type, the routing protocol, and the access control list (ACL) for each rack pair. The ACL can be used to filter the traffic based on the source and destination IP addresses, the protocol, and the port2.
Put each network in different Routing Zones. This allows you to create logical boundaries between different virtual networks based on the route target (RT) values. A routing zone is a collection of virtual networks that share the same RT for importing and exporting routes. Virtual networks in different routing zones do not exchange routes with each other, unless you configure remote EVPN gateways to connect them3.

Reference:

Security Policy
Connectivity Templates
Routing Zones

Reveal Solution Next Question

QUESTION: 8

Exhibit.

The 10.100.0.0/16 route is being advertised into your BGP IP fabric. ECMP load balancing has been properly enabled on all devices
In this scenario, how many routes will the leaf device in AS 65000 receive for the 10.100.0.0/16 prefix?

Answer(s): A

Explanation:

The leaf device in AS 65000 will receive three routes for the 10.100.0.0/16 prefix, one from each spine device in AS 65001, AS 65002, and AS 65003. Since ECMP load balancing is enabled, the leaf device will install all three routes in its routing table and distribute the traffic among them. The other options are incorrect because:
B) 1 is wrong because the leaf device will not receive only one route for the prefix. It will receive multiple routes from different spine devices and use ECMP to load balance among them. C) 2 is wrong because the leaf device will not receive only two routes for the prefix. It will receive three routes from three spine devices, as explained above. D) 4 is wrong because the leaf device will not receive four routes for the prefix. It will receive three routes from three spine devices, as explained above. The fourth spine device in AS 65004 is not directly connected to the leaf device and will not advertise the prefix to it.

Reference:

IP Fabric Underlay Network Design and Implementation
BGP Multipath load sharing iBGP and eBGP
ECMP Load Balancing

Reveal Solution Next Question

QUESTION: 9

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

Interconnection is the default behavior.
Use interconnection through the fabric spine nodes.
Interconnection cannot be enabled.
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

Reveal Solution Next Question

QUESTION: 10

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.)

The underlay must use IRB interfaces.
The underlay must be provisioned with PIMv2.
Loopback IPv4 addresses must be advertised into the EBGP underlay from leaf and spine devices.
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

Reveal Solution Next Question

Juniper Data Center, Specialist JN0-480 Dumps in PDF

Free Juniper JN0-480 Real Questions (page: 13)

QUESTION: 6

Explanation:

Reference:

QUESTION: 7

Explanation:

Reference:

QUESTION: 8

Explanation:

Reference:

QUESTION: 9

Explanation:

Reference:

QUESTION: 10

Explanation:

Reference: