Set the router to AP mode, and still use the WAN port for the uplink to the primary router.
That's what I did at first but then I lost all functions I bought this router for...qos, monitoring etc. I spent the last 12 hours setting this up and I wish I never switched. My last problem is I have 2x10tb ext4 hooked to the Asus but no device can read or even find these 2
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:24 kernel: sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] 15628052480 512-byte logical blocks: (8.00 TB/7.28 TiB)
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] 4096-byte physical blocks
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] Write Protect is off
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] No Caching mode page found
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] Assuming drive cache: write through
May 5 06:05:24 kernel: sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:25 kernel: .ready
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] 15628052480 512-byte logical blocks: (8.00 TB/7.28 TiB)
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] 4096-byte physical blocks
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] Write Protect is off
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] No Caching mode page found
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] Assuming drive cache: write through
May 5 06:05:25 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:26 kernel: sd 1:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:26 kernel: sd 1:0:0:0: [sdb] Attached SCSI disk
May 5 06:05:26 kernel: sd 0:0:0:0: [sda] Very big device. Trying to use READ CAPACITY(16).
May 5 06:05:26 kernel: sd 0:0:0:0: [sda] Attached SCSI disk
May 5 06:05:27 usb: USB ext4 fs at /dev/sdb1 mounted on /tmp/mnt/easystore.
May 5 06:05:30 rc_service: hotplug 1247:notify_rc rest