Using the AUX port of a Bigleaf router as a second LAN

With the Standard Availability Bigleaf service, where you have only one Bigleaf router, the AUX port can be configured as a second LAN port if needed.

Note: You can’t configure the AUX port as a second LAN port when using the High Availability (HA) service, where more than one Bigleaf router is used.

Requirements

The site must have a LAN block bigger than /30

A /30 block gives you only one usable Public IP Address so there are no IPs to give to a second device.

If you connect a switch to a LAN-enabled AUX port, be sure that it’s running a loop-prevention protocol (like STP, SLPP, or similar)

The LAN and AUX ports are bridged together in the Bigleaf router when the AUX port is LAN-enabled.  If your switch is not running a loop-prevention protocol, you could create a switching loop which would take your site offline.

The Bigleaf IPs need to be of the same type for both the LAN and the AUX ports – static or dynamic

The Bigleaf router can’t hand out DHCP addresses from one port and then connect with a statically configured IP on the other port.  In other words, both LAN and AUX ports are static, and you configured your devices with IPs in the LAN block, or both LAN and AUX ports are dynamic, providing DHCP addresses to connected devices.

How to configure an AUX port as LAN

1. Log in to the Bigleaf Web Dashboard with a Super Admin account.
2. Go to the Site’s Configuration tab, and select Edit in the upper right.
3. In the Port Settings section, locate the AUX Settings and check the box for Enable as 2^nd Lan Port.
4. Select Save.