H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 789)

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Figure 798 Configuring the AP connection priority
7. Select Advance > AC Backup from the navigation tree. You are placed on the Setup tab.
8. On the page that appears, select the IPv4 box, set the IP address of the backup AC to 1.1.1.5, and
select enable to enable the fast backup mode.
9. Click Apply.