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For the two bridges that are to be linked to communicate properly, they have to be set up
with compatible commands in the setup screens.
For instance, the bridges must have the same channel number. Because there is a separate
WLAN card for bridging, there can be a separate WLAN on the 802.11b/g card with no loss
efficiency, as long as you set the channel numbers so there's no conflict or noise with the channel
assigned to the bridge. Spanning Tree Protocol may be set to enable, if there is any possibility of
a bridging loop, or to disable (which is more efficient) if there's no possibility of a bridging loop.
Each bridge must contain the other's BSSID. (The BSSID of each is equivalent to the MAC
address contained on the Wireless Configuration—Bridging setup page. Enter only hexadecimal
numbers, no colons. Data entry is not case sensitive.) Finally, the wireless bridging encryption
must be set to the appropriate type and key length and must be identical on each bridge.
The following chart shows sample settings.
Point-to-point bridging setup guide
Direction Bridge 1 Bridge 2
Wireless Configuration – General
SSID
default (or set for 802.11b/g
WLAN)
default (or set for 802.11b/g
WLAN)
Channel
11 11
Wireless Configuration – Encryption
Set for 802.11b/g WLAN Set for 802.11b/g WLAN
Wireless Configuration – Bridging
Channel
4 4
Tx Power
Auto Auto
Wireless Client Access
Enable Enable
Spanning Tree Protocol
Enable (or Disable if no
bridging loop possible)
Enable (or Disable if no
bridging loop possible)
BSSID
Add Bridge 2 BSSID Add Bridge 1 BSSID
Wireless Configuration – Bridging Encryption
Select appropriate key
type/length and value. Must
be the same key as Bridge 2.
Select appropriate key
type/length and value. Must
be the same key as Bridge 1.
The following sequence walks you through the setup of bridge 1. Bridge 2 would duplicate
this procedure, with the BSSID of bridge 2 being the MAC address of bridge 1 and vice versa.
First, navigate to the Wireless Configuration—General screen and set the channel number
of the AP WLAN card so that it doesn't conflict with the channel number you will be using for
the bridge. Leave the TX Pwr mode in AUTO position at this time. If there is a wireless LAN on
the 802.11b/g card, other information would be set as discussed in Chapter 3.