ZyXEL Communications ZyAIR G-3000H Firmware Release Notes page 17

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Appendix 3: Backup RADIUS Server
ZyAIR devices support backup radius server and accounting server setting. ZyAIR devices use
the first radius server setting as the default configuration. Figure shows the backup radius server
concept. There are two radius servers can be reached by ZyAIR device. If supplicant issue an
authentication request to ZyAIR device and trying to authenticate with radius server, ZyAIR
device will keep trying forward this request to radius server 1. If ZyAIR device keep trying for 3
times and radius server still doesn't response the request then ZyAIR device will auto switch the
authentication request packet to radius server 2. The trying time interval is depending on the
supplicant re-try interval.
Radius
ZyAIR device
X
Supplican
t
Radius
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