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Typical Configuration Examples

SD-WAN V100R018C00

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Configuring Interconnection Between VLANs and LAN-side Networks and Configuring a VRRP Group

Configuring Interconnection Between VLANs and LAN-side Networks and Configuring a VRRP Group

Related Products

Agile Controller-Campus: V300R003C00

AR: V300R003C00

Networking Requirements

Figure 1-14 shows the SD-WAN networking of an enterprise. On the SD-WAN network constructed by the tenant administrator, the dual gateways at the branch site Site3, that is, Site3_1 and Site 3_2, are connected to the Layer 2 network of VLAN 10, and different users are located in the same network segment. Hosts are dual-homed to Site3_1 and Site3_2 through Layer 2 switches. The user requirements are as follows:

  • Hosts at Site3 use Site3_1 as the master gateway to connect to the MPLS network. If Site3_1 fails, Site3_2 assumes the role of the master, implementing gateway backup.
  • Site3_1 becomes the master gateway again after it recovers.
Figure 1-14 Enterprise networking diagram

Solution Design

Based on customer requirements and the networking plan, the tenant administrator has created the hub site and branch sites, and has completed the underlay network configurations. To implement interconnection between VLANs and LAN-side overlay networks, as well as deploy the VRRP master and backup gateways, perform the following tasks:

  1. Add LAN-side interfaces to VLANs and configure the interfaces to permit packets of the VLANs that users belong to.
  2. Configure IP addresses for VLANIF interfaces for Layer 3 connectivity.
  3. Configure the VRRP master and backup gateways. Create a VRRP group and configure a virtual IP address for this VRRP group.

    Site3_1 functions as the master gateway to forward traffic and has the preemption delay configured to 20s. Site3_2 functions as the backup gateway to ensure gateway redundancy, and has the preemption delay configured to 0, indicating immediate preemption.

Data Plan

Table 1-55 VLAN information

Item

Value

Site

Hub1

Site2

Site3

Device

Hub1_1

Hub1_2

Site2_1

Site3_1

Site3_2

VLAN ID

10

10

10

20

10

10

Physical interfaces

GE8/0/2

GE8/0/2

GE0/0/1

GE0/0/2

GE0/0/2

GE0/0/2

Mode

Untag

Untag

Untag

Untag

Untag

Untag

IP address

10.1.1.1/24

10.1.1.2/24

10.3.1.254/24

10.4.1.254/24

10.5.1.252/24

10.5.1.253/24

Trust mode

Trust

Trust

Trust

Trust

Trust

Trust

VRRP

OFF

OFF

-

-

ON

ON

VRRP ID

-

-

-

-

10

10

Virtual IP

-

-

-

-

10.5.1.254

10.5.1.254

Default role

-

-

-

-

Master

Backup

Preempt delay (s)

-

-

-

-

20

0

Procedure

  1. Log in to the Agile Controller-Campus as a tenant administrator.
  2. Finish creating sites.
  3. Configure a VLAN for Hub1.

    1. Choose Configuration > Overlay Network > Site Configuration.
    2. Select Hub1 from the list on the left and click the VLAN tab in the right pane.
    3. Click Create and enter VLAN information. On the main page, click Apply Changes.
      • VLAN configurations for Hub1_1

      • VLAN configurations for Hub1_2

  4. Configure a VLAN for Site2.

    Perform the same operations as those for the hub site to configure a VLAN for Site2.

    • VLAN configuration for Site2_1

  5. Configure a VLAN for Site3.

    1. Choose Configuration > Overlay Network > Site Configuration.
    2. Select Site3_1 from the list on the left and click the VLAN tab in the right pane.
    3. Click Create to configure VLAN parameters.
    4. On the Create VLAN page, click Advanced Settings to configure the VRRP master and backup gateways.
    5. After configuring the VLAN and VRRP, click Apply Changes.
      • VLAN configuration for Site3_1

      • VRRP configurations for Site3_1

      • VLAN configuration for Site3_2

      • VRRP configurations for Site3_2

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Updated: 2019-03-04

Document ID: EDOC1100036696

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