H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 732)

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Configuring advanced settings
Advanced settings overview
Country/Region code
Radio frequencies for countries and regions vary based on country regulations. A country/region code
determines characteristics such as frequency range, channel, and transmit power level. Configure the
valid country/region code for a WLAN device to meet the specific country regulations.
1+1 AC backup
Support for the 1+1 backup feature might vary depending on your device model. For more information,
see " About the H3C Access Controllers Web-Based Configuration Guide ."
Dual-link backup
• Dual links:
Dual links allow for AC backup. An AP establishes links with two different ACs. The active AC
provides services for APs in the network, and the standby AC provides backup service for the
active AC. If the active AC fails, the standby AC takes over to provide services for the APs.
Figure 743 Dual link topology
AC 1 is operating in active mode and providing services to AP 1, AP 2, AP 3, and AP 4. AC 2 is
operating in standby mode. APs are connected to AC 2 through backup links. When AC 1 is down,
AC 2 converts to operate in active mode even when AC 1 is up again, in which case, AC 1 is in
standby mode. However, this is not so if an AC is configured as the primary AC. For more
information about primary AC, see "
Primary AC recovery ."
• Using fast link fault detection, you can configure 1+1 fast backup (see " 1+1 fast backup ") to
provide uninterrupted services.