Bridging Operation, Bridge Configuration

13: Bridging

Bridging Operation

During initialization, both eth0 and wlan0 are enabled and controlled by the bridging subsystem. Important aspects to keep in mind:

If eth0 physical link is down, wlan0 is the Primary Interface.

If eth0 physical link is up, eth0 is the Primary Interface.

When eth0 link is up, wlan0 link is established, and the Bridging MAC Address is acquired (via pre- configuration or auto-detection), Bridging enters the Active state. If either link goes down, bridging falls back to the Inactive state.

When in the Active state, all packets that arrive on the wlan0 interface are bridged out the eth0 interface. Similarly, all packets that arrive on the eth0 interface are bridged out the wlan0 interface. However, exceptions to this behavior include:

Ethernet packets directed specifically to the Ethernet (eth0) MAC Address are terminated internally and are not bridged to WLAN.

ARP Requests for the Primary Interface's IP address are terminated internally and are not bridged to WLAN

Ethernet packets which are not originated from the Bridging MAC Address are discarded

Bridge Configuration

A bridge may be configured between an Ethernet interface and a WLAN interface. A bridge represents a relationship between the interface minor numbers. For example, br0 is a bridge between eth0 and wlan0.

	Table 13-1 Bridge Settings

WLAN Profile WPA & WPA2	Description
Settings
State	Enable or disable bridging.

Bridging MAC Address	Specify the MAC address of bridgeable traffic between the Ethernet and
	WLAN interfaces. When bridging is active, this MAC Address will be used as
	the MAC address of the WLAN interface. Packets received on the Ethernet
	interface from this address will be bridged to the WLAN interface (except
	traffic directed at the Primary Interface). If this field is not configured, then the
	device waits for the first packet to arrive on the Ethernet interface and uses
	the source address as the bridging address.
	Note: if a Bridging MAC Address is not configured, then once it is obtained
	and configured dynamically, it remains in effect until a reboot.

To View or Configure Bridge Settings

Using Web Manager

To view the Bridge status, click Bridge on the menu, select a particular bridge and click Status.

To configure Bridge settings, click Bridge on the menu, select a particular bridge and click Configuration.

Lantronix XN manual Bridging Operation, Bridge Configuration, To View or Configure Bridge Settings