Figure 4-10 Bridge Loop: Two Bridges Connected To Hub; Figure 4-11 Bridge Loop: Bridge Connected To Wired Lan - ZyXEL Communications ZyAIR B-420 User Manual

Be careful to avoid bridge loops when you enable bridging in the ZyAIR. Bridge loops cause broadcast
traffic to circle the network endlessly, resulting in possible throughput degradation and disruption of
communications. The following examples show two network topologies that can lead to this problem:
If two or more ZyAIRs (in bridge mode) are connected to the same hub as shown next.

Figure 4-10 Bridge Loop: Two Bridges Connected to Hub

If your ZyAIR (in bridge mode) is connected to a wired LAN while communicating with another
wireless bridge that is also connected to the same wired LAN as shown next.

Figure 4-11 Bridge Loop: Bridge Connected to Wired LAN

To prevent bridge loops, ensure that your ZyAIR is not set to bridge mode while connected to both wired and
wireless segments of the same LAN.
Click WIRELESS under SETUP. Select Bridge in the Operating Mode drop-down list box to display the
screen as shown.
Wireless LAN
ZyAIR B-420 Wireless LAN Ethernet Adapter and Bridge
4-11