Configuring a multi-appliance Data Center through iBGP

This section describes how to configure a Data Center with two appliances through iBGP. The objectives of this deployment are the following:

high availability: if one hub appliance is in bad health, the other appliance is used as backup appliance
load balancing: if your network includes many spokes, you may distribute traffic on several hub appliances
transit traffic routing: the two appliances are used to interconnect several regional networks

iBGP peering is possible:

between two or more SD-WAN appliances
when the SD-WAN appliances have the same AS number
when the SD-WAN appliances are connected to the same LAN or VLAN
when the SD-WAN appliances are connected to different LANs or VLANs via a Core Router

The following configuration Use Cases are complementary to both Use Case 1 and Use Case 2.

Use Case 4A and Use Case 4B refer to a multi-appliance Data Center configured in Router Mode
Use Case 4C refers to a multi-appliance Data Center configured in Hybrid Mode

Router Mode

For Use Case 4A and Use Case 4B which are complementary to "Use Case 2", there is one prerequisite which is the necessary configuration of the second hub appliance of the Data Center.

1 Configure the hub appliance as follows:

2 Check that you use the same Local Autonomous System as for the Data Center first appliance: 65214.
3 Then configure its LAN to meet Use Case 4A and Use Case 4B requirements as described on the following pages.

Hybrid Mode

For Use Case 4C which is complementary to "Use Case 1", there is one prerequisite which is the necessary configuration of the second hub appliance of the Data Center.

1 Configure the hub appliance as follows:
2 Check that you use the same Local Autonomous System as for the Data Center first appliance: 65214.
3 Then configure its LAN to meet Use Case 4C requirements as described on the following pages.