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What are two methods used to scale an IBGP IP Fabric? (Choose two.)

A.
Spanning tree
A.
Spanning tree
Answers
B.
Redundant trunk groups
B.
Redundant trunk groups
Answers
C.
Route reflection
C.
Route reflection
Answers
D.
Confederations
D.
Confederations
Answers
Suggested answer: C, D

Explanation:

Route reflection and confederations are two methods used to scale IBGP in an IP fabric. Route reflection allows an IBGP router to advertise routes received from one IBGP peer to another, reducing the number of IBGP sessions required. Confederations divide an autonomous system into smaller sub-autonomous systems, simplifying the internal BGP routing policy and management.

Juniper Networks - BGP Route Reflection

Juniper Networks - BGP Confederations

You are designing a network for a small data center. In this scenario, which underlay protocol allows for the simplest implementation?

A.
EBGP
A.
EBGP
Answers
B.
OSPF
B.
OSPF
Answers
C.
IGGP
C.
IGGP
Answers
D.
MPLS
D.
MPLS
Answers
Suggested answer: B

Which two statements describes an IP fabric? (Choose two.)

A.
Each leaf should have a connection to each spine.
A.
Each leaf should have a connection to each spine.
Answers
B.
Open standards allow for vendor interoperability.
B.
Open standards allow for vendor interoperability.
Answers
C.
Traffic should always follow a single path
C.
Traffic should always follow a single path
Answers
D.
xSTP protocols should be used to prevent loops
D.
xSTP protocols should be used to prevent loops
Answers
Suggested answer: A, B

Explanation:

A) In an IP fabric, it's a fundamental design principle that each leaf switch should have a connection to each spine switch to ensure redundancy and optimal path utilization.

B) IP fabrics are typically built using open standards, which allow for vendor interoperability, providing flexibility in choosing hardware and software solutions from different vendors.

Juniper Networks - IP Fabric Architecture Guide

What happens when a packet is encapsulated by a VXLAN before being placed in the overlay?

A.
The TTL is decremented by two and placed in the VXLAN header.
A.
The TTL is decremented by two and placed in the VXLAN header.
Answers
B.
The QoS marketing are placed in the VXLAN header.
B.
The QoS marketing are placed in the VXLAN header.
Answers
C.
The VLAN-ID is placed in the VXLAN header.
C.
The VLAN-ID is placed in the VXLAN header.
Answers
D.
A VNI that maps to the VLAN-ID placed in the VXLAN header.
D.
A VNI that maps to the VLAN-ID placed in the VXLAN header.
Answers
Suggested answer: D

Explanation:

When a packet is encapsulated by VXLAN, a VXLAN Network Identifier (VNI) is placed in the VXLAN header. This VNI is crucial as it maps to the VLAN-ID, ensuring that the packet is correctly identified and routed within the overlay network.

Juniper Networks - VXLAN Overview

After configuring an IP fabric using EBGP as you protocol, you notice that not all of the routers are showing up in the routing tables. You have verified that all adjacencies have formed, and place and configured properly.

In this scenario, which statement is true?

A.
The routers have not been configured with the multipath multiple-as parameter.
A.
The routers have not been configured with the multipath multiple-as parameter.
Answers
B.
The routers have not been configured using the bfd-1 Liveness-detection parameter.
B.
The routers have not been configured using the bfd-1 Liveness-detection parameter.
Answers
C.
The routers have not been configured using the multihop parameter.
C.
The routers have not been configured using the multihop parameter.
Answers
D.
The routers have not been configured using the add-path parameter
D.
The routers have not been configured using the add-path parameter
Answers
Suggested answer: A

Explanation:

If not all routers show up in the routing tables despite formed adjacencies in an EBGP setup, it's likely due to the lack of configuration of the 'multipath multiple-as' parameter. This parameter allows the use of multiple paths for BGP routes even when they originate from different ASes.

Juniper Networks - BGP Multipath

You are asked to manage the oversubscription ratio of your spine and leaf IP fabric. You determine that you are at a 3:1 ratio of downstream to upstream traffic and must achieve a 1.1ratio. In this scenario, which two actions would you take to achieve this goal? (Choose two.)

A.
Reduce the number of leaf nodes on your design.
A.
Reduce the number of leaf nodes on your design.
Answers
B.
Increase the number of spine nodes in your design.
B.
Increase the number of spine nodes in your design.
Answers
C.
Increase the number of server facing ports that each leaf node uses to carry traffic.
C.
Increase the number of server facing ports that each leaf node uses to carry traffic.
Answers
D.
Reduce the number of server facing that each leaf node uses to carry traffic.
D.
Reduce the number of server facing that each leaf node uses to carry traffic.
Answers
Suggested answer: B, C

Explanation:

To achieve a lower oversubscription ratio in a spine-leaf architecture, you can increase the number of spine nodes (B) and increase the number of server-facing ports on each leaf node (C). This enhances the overall bandwidth and connectivity, leading to a better ratio of downstream to upstream traffic.

Juniper Networks - Data Center Network Design Best Practices

You are asked to enable plug-and-play line card switches in an active VCF without making any future Junos configuration charges. You are also required to ensure that all new line card are automatically upgrade to the correct Junos version without any manual intervention. In this scenario, which two actions will accomplish this task? (Choose two.)

A.
Set the virtual Chassis as auto-provisioned before the line cars are inserted.
A.
Set the virtual Chassis as auto-provisioned before the line cars are inserted.
Answers
B.
Ensure that the newly instead card's MAC addresses are present in the DHCP configuration for ZTP.
B.
Ensure that the newly instead card's MAC addresses are present in the DHCP configuration for ZTP.
Answers
C.
Set the Virtual Chassis as per-provision before the line are inserted.
C.
Set the Virtual Chassis as per-provision before the line are inserted.
Answers
D.
Configure the auto-sw-update parameter on the VCF before inserting new line cards.
D.
Configure the auto-sw-update parameter on the VCF before inserting new line cards.
Answers
Suggested answer: A, D

Explanation:

Setting the Virtual Chassis as auto-provisioned (A) and configuring the auto-sw-update parameter (D) are key to enabling plug-and-play functionality for line card switches in an active VCF. This ensures that new line cards are automatically recognized and updated to the correct Junos version without manual intervention.

Juniper Networks - Virtual Chassis Fabric Configuration Guide

You are implementing perimeter security for your data center. You need to inspect all traffic Layer 7 and ensure the failure of a port or device will not result in an interruption to traffic flows. In this scenario, which design would satisfy these requirements?

A.
MX with MC LAG
A.
MX with MC LAG
Answers
B.
QFX Virtual Chassis
B.
QFX Virtual Chassis
Answers
C.
SRX Chassis cluster
C.
SRX Chassis cluster
Answers
D.
SRX using LAG
D.
SRX using LAG
Answers
Suggested answer: C

Explanation:

An SRX Chassis cluster setup is ideal for implementing perimeter security with Layer 7 inspection and ensuring no interruption in traffic flow even if a port or device fails. The chassis cluster configuration provides redundancy and high availability for critical security functions.

Juniper Networks - SRX Series Services Gateways

Which protocol replicates forwarding information between MC-LAG peers?

A.
VCCP
A.
VCCP
Answers
B.
ICCP
B.
ICCP
Answers
C.
VRRP
C.
VRRP
Answers
D.
LLDP
D.
LLDP
Answers
Suggested answer: B

Explanation:

ICCP (Inter-Chassis Control Protocol) is the protocol used to replicate forwarding information between MC-LAG (Multi-Chassis Link Aggregation Group) peers. It ensures coordination and consistency of state between the MC-LAG devices.

Juniper Networks - Understanding MC-LAG

Which statement is true about a Data center interconnect over an IP network?

A.
Layer 2 data must traverse a point-to-point
A.
Layer 2 data must traverse a point-to-point
Answers
B.
Layer 2 data must traverse an MPLS LSP.
B.
Layer 2 data must traverse an MPLS LSP.
Answers
C.
Layer 2 data must be encapsulated.
C.
Layer 2 data must be encapsulated.
Answers
D.
Layer 3 data must be encapsulated
D.
Layer 3 data must be encapsulated
Answers
Suggested answer: C

Explanation:

For a Data Center Interconnect (DCI) over an IP network, Layer 2 data needs to be encapsulated. This encapsulation, typically using VXLAN or similar technologies, allows Layer 2 traffic to traverse an IP network while preserving the Layer 2 information.

Juniper Networks - Data Center Interconnect Solutions

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