Cooper Bussmann BU-945U-E 802.11 DSSS user manual Routing Rules, WDS Connections, Stp

Cooper Bussmann Wireless Ethernet & Device Server BU-945U-E 802.11 DSSS User Manual

WDS Connections:

Connection Mode	Specify the connection mode for this link. AP (Downlink) configures the connection as a virtual access point.
	Sta (Uplink) configures the connection as a virtual client. Point-to-point configures the connection as a fixed link.
SSID / MAC Address	AP Mode: Specify the SSID that this virtual access point will use. Stations connecting to this virtual access point use
	this SSID. Sta Mode: Specify the SSID that this virtual station will use when connecting to other access points.
	Point-to-Point Mode: Specify the MAC address of an Access Point to establish a Fixed link with. Usually only required
	for third-party devices.
Encryption	Select the required Encryption (if any) for this WDS link.
Encryption Key	Enter the Encryption key (for WEP encryption) or the passphrase (for WPA encryption). For WEP encryption, the
	encryption key is set as WEP Key 1. For Sta Mode, this must match WEP Key 1 on the Access point this virtual client
	will connect to. For AP mode, clients must configure their WEP Key 1 to the same value as this key and select the
	Default WEP Key to be WEP Key 1.
Router IP	Leave this field blank if this WDS interface is to be bridged with the default wireless interface. Otherwise enter the
	IP address for this connection that specifies the IP network to which messages are routed.
Router Subnet	Leave this field blank if this WDS interface is to be bridged with the default wireless interface. Otherwise enter the
	subnet mask of the network to which messages are routed.
STP	Applicable to WDS bridged connections only. Select the STP option if you wish to enable the bridge Spanning Tree
	Protocol on this connection.

3.13 Routing Rules

When a BU-945U-E receives an IP frame that is destined for an IP address on a different network, it checks if the network address matches the network address of one of its own interfaces (i.e., hard-wired Ethernet, or wireless Ethernet, or WDS) and forwards the frame appropriately. However, if the IP network address does not match the network address of any of its interfaces, the BU-945U-E will forward the frame to its default gateway. In this case it is assumed that the default gateway has a valid route to the destination.

In some cases, it is not practical to have just one default gateway (i.e., routed wireless networks with more than two BU-945U-E routers; and in some cases when WDS router interfaces are used). If more than one “next-hop router” is required, the BU-945U-E allows for up to 30 routing rules to be configured. A routing rule specifies a destination network (or host) IP address and the corresponding next-hop router that messages for the specified destination will be forwarded to. It is assumed that the next-hop router (or gateway) will then deliver the data to the required destination (or forward it on to another router that will).

The above network diagram illustrates a situation where routing rules may need to be configured. In this example, the BU-945U-E clients need only specify the Access Point as their default gateway (i.e., they require no routing rules be configured). However, for the Access Point to be able to deliver traffic to LAN B and LAN C it needs to have routing rules configured that specify the respective BU-945U-E client/routers as next-hop routers (i.e., gateways) to networks B and C. Note that devices on LAN A should specify the BU-945U-E Access Point as their default gateway.

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