300-415 Exam Dumps - Implementing Cisco SD-WAN Solutions (300-415 ENSDWI)

To achieve communication between Barcelona and Paris through the London site, a control policy needs to be configured to force traffic from these two sites to pass through the London site. This setup involves manipulating the routing information such that London becomes a transit hub for traffic between Barcelona and Paris.

Understanding the Policy Requirements:

Centralized Policy: This type of policy is applied at the controller level and affects multiple devices in the SD-WAN fabric. It allows the control of routing behavior across the entire network.

Route Policy: Specifically, a route policy will be used to set the preferred path for traffic between sites, ensuring that it passes through London.

Option Analysis:

Option A: Shows the configuration of a centralized policy with a focus on route policy, which is necessary to achieve the desired traffic flow manipulation.

Other Options: Do not provide the necessary centralized policy or route policy configurations that are needed to control the routing paths between the sites.

Configuration Details:

Centralized Policy: Define the policy under the centralized policy section in the vManage GUI.

Route Policy: Create and apply a route policy that specifies the desired routing behavior for traffic between Barcelona and Paris, ensuring it routes through London.

Cisco SD-WAN Control Policy Configuration Guide

Cisco SD-WAN Centralized Policy Documentation

Step 1 – Enable NAT Functionality

Step 2 – Create centralized data policy

Step 3 – Identify VPN and match criteria

Step 4 – Apply data policy

To configure Rome WAN Edge to prefer the MPLS cloud for reaching Paris WAN Edge, and use biz-internet as a backup, the policy must be set correctly to define the preference for each transport link.

Understanding TLOCs (Transport Locator): TLOCs represent the transport network paths (MPLS, Internet, etc.) available for SD-WAN. The preference values assigned to TLOCs determine their priority. A lower preference value indicates a higher priority.

Policy Configuration Analysis:

Option A: This option correctly configures the TLOC list for the system IPs representing the MPLS and biz-internet links with the appropriate preferences (500 for MPLS and 400 for biz-internet).

Other options either repeat the TLOC configuration incorrectly or reference wrong system IPs.

Policy Configuration:

policy

lists

tloc-list TLOC-1

tloc 10.1.1.102 color mpls encap ipsec preference 500

tloc 10.1.1.102 color biz-internet encap ipsec preference 400

Cisco SD-WAN Policy Framework Guide

Cisco SD-WAN Transport Locator Configuration Documentation

https://www.cisco.com/c/dam/en/us/td/docs/routers/sdwan/configuration/config-18-4.pdf#page=242