Dynamic WAN Interfaces with PPPoE HA

PPPoE can be enabled on interfaces in Active/Standby mode without stateful synchronization. PPPoE HA provides HA where a Standby firewall assumes connection to the PPPoE server when the Active firewall fails.

One WAN interface must be configured as PPPoE; see Configuring a WAN Interface section in the document on the SonicWall technical documentation site.

After the Active unit connects to the PPPoE server, the firewall synchronizes the PPPoE session ID and server name to the Standby unit.

When the Active firewall fails, its PPPoE connection on the client side times out. The Secondary firewall connects to the PPPoE server, terminates the original connection on the server side, and starts a new PPPoE connection. All pre-existing network connections are rebuilt, the PPPoE sessions are re-established, and the PPP process is renegotiated.