Vce JN0-637 Questions Latest

For ADVPN with OSPF, using a point-to-multipoint (p2mp) interface type and enabling dynamic-neighbors are crucial. This configuration allows dynamic discovery of neighbors and the establishment of tunnels. For more information, refer to Juniper ADVPN Configuration Guide.

In the ADVPN configuration, OSPF isn't functioning as expected due to the interface configuration on st0.0. Here are the adjustments needed:

Interface Type p2mp (Answer A): OSPF requires that the tunnel interface be set to p2mp (point-to-multipoint) to allow OSPF to communicate with multiple dynamic neighbors overthe ADVPN tunnels.

Command Example:

bash

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set interfaces st0.0 family inet ospf interface-type p2mp

Dynamic Neighbors (Answer B): The dynamic neighbors statement allows OSPF to discover and communicate with dynamically established spokes in an ADVPN environment. This is essential for ADVPN to function properly since the tunnel endpoints are not static.

Command Example:

bash

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set protocols ospf area 0.0.0.0 interface st0.0 dynamic-neighbors

These settings ensure OSPF properly functions over dynamically created ADVPN tunnels.

When configuring interconnect logical systems to act as a VPLS switch between two logical systems, the following configurations are necessary:

Encapsulation Ethernet (Answer A): The logical tunnel interface must be configured with encapsulation ethernet. This allows the interface to carry Ethernet traffic between the logical systems.

Command Example:

bash

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set interfaces lt-0/0/0 encapsulation ethernet

Two Logical Unit Pairs (Answer C): Each logical tunnel interface should have two logical unit pairs defined to facilitate communication between the two logical systems. One logical unit pair connects each logical system.

Command Example:

bash

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set interfaces lt-0/0/0 unit 0 family ethernet-switching

set interfaces lt-0/0/0 unit 1 family ethernet-switching

These settings are necessary for creating a logical tunnel for VPLS and allowing traffic between the logical systems.

In the exhibit, the CoS-based VPN configuration is not functioning correctly due to an issue with the number of forwarding classes. The maximum number of forwarding classes supported for CoS-based VPNs with multiple SAs (security associations) is typicallyfourforwarding classes. In this case, more than four forwarding classes are defined.

To solve the issue,one forwarding class must be deletedto ensure that the total number of forwarding classes is reduced to four or fewer.

The request security policies check command allows you to simulate a session through the SRX device, checking the security policy action that would apply without needing to send real traffic. This helps in validating configurations before actual deployment. For more details, see Juniper Security Policies Testing.

The commandrequest security policies checkis used to test how a Junos security device handles a theoretical session without generating actual traffic. This command is useful for validating how security policies would be applied to a session based on various parameters like source and destination addresses, application type, and more.

Explanation of Answer A (request security policies check):

This command allows you to simulate a session and verify which security policies would be applied to the session. It's a proactive method to test security policy configurations without the need to generate real traffic.

Example usage:

bash

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request security policies check from-zone trust to-zone untrust source 10.1.1.1 destination 192.168.1.1 protocol tcp application junos-https

Juniper Security Reference:

Security Policies Check: This command provides a way to simulate and verify security policy behavior without actual traffic. Reference: Juniper Security Policy Documentation.

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