ZyAIR B-420 Wireless LAN Ethernet Adapter and Bridge

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.

Wireless LAN

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