H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 792)

771
Figure 802 Displaying the AP status on AC 2
2. When AC 1 goes down, the standby AC (AC 2) detects the failure immediately through the
heartbeat detection mechanism. Then AC 2 takes over to become the new active AC, providing
services to AP.
On AC 2 (the new active AC), display the AP status. (Details not shown.)
The information shows that AC 2 has become the active AC.
On AC 2, display the client information. (Details not shown.)
The value for the State field turns to Running from Running/B, which indicates that the client is
connecting to AC 2 through an active link.
3. When AC 1 recovers, AC 2 still acts as the active AC, and AC 1 becomes the standby AC. AC 1
establishes a backup link with the AP and backs up the client status.
1+N backup configuration example
Network requirements
As shown in Figure 524 , AC 1 and AC 2 are active ACs, and AC 3 acts as the standby AC. When an
active AC fails, AC 3 (the standby AC) takes over to provide services. As soon as the active AC recovers,
the AP connects to the original active AC again.
• AP connects to AC 1, AC 2, and AC 3 through a Layer 2 switch. The IP addresses of AC 1, AC 2,
and AC 3 are 1.1.1.3, 1.1.1.4, and 1.1.1.5, respectively.
• Assign the highest AP connection priority of 7 on AC 1 and AC 2 to make sure AP 1 establishes a
connection with AC 1, and that AP 2 establishes a connection with AC 2.
• If one of the two active AC is down, AC 3 becomes the new active AC.
• When the faulty AC recovers, the AP that connects to AC 3 automatically connects to the original
active AC. This is because the AP connection priority on the active AC has the highest priority. In this
way, AC 3 can always act as a dedicated standby AC to provide backup services for AC 1 and AC
2.