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Typical Configuration Examples

SD-WAN V100R018C00

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Configuring Communication Between SD-WAN Sites and Legacy Sites in Centralized Access Mode Through a Branch Site

Configuring Communication Between SD-WAN Sites and Legacy Sites in Centralized Access Mode Through a Branch Site

Related Products

Agile Controller-Campus: V300R003C00

AR: V300R003C00

Networking Requirements

Figure 1-23 shows the SD-WAN networking of Enterprise A. On this network, Site1 is a legacy site outside an SD-WAN network. The enterprise requires that all SD-WAN sites communicate with Site1.

Figure 1-23 Enterprise networking

Solution Design

The tenant administrator has completed SD-WAN network configurations. Only Site2 is connected to the MPLS and Internet network, and Site1 is also connected to the MPLS network. The centralized access mode can be configured to enable hub site and branch sites to communicate with Site1 through Site2.

Data Plan

Table 1-67 Site-to-legacy site policy information



Centralized access


Link Priority

WAN links at Site2




  1. Log in to the Agile Controller-Campus as a tenant administrator.
  2. Finish creating sites.
  3. Configure a site-to-legacy site policy at Site2 on the overlay network to enable communication between SD-WAN sites and the legacy site.

    1. Choose Configuration > Traffic Policy.
    2. Click Site-to-Legacy Site. On the Site-to-Legacy Site tab page, click Centralized access to configure the access mode.
    3. Click Create, select Site2 and click IGW to enable the gateway function for communication between SD-WAN sites and legacy sites.

    4. Click in the Operation column to activate the egress link. Configure the link priority and click Apply Changes on the main page.

Updated: 2019-03-04

Document ID: EDOC1100036696

Views: 18190

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