Peplink Balance Port Up & Down

Hi Everyone got encounter, peplink balance LAN port up and down, our LAN interface and customer firewall, interface set to auto, but it will like keep up and down?

Jul 16 11:03:48 Port: Port 1 status changed (link up, speed 100 Mbps Full Duplex)
Jul 16 11:03:27 Port: Port 1 status changed (link down)
Jul 16 10:06:32 Port: Port 1 status changed (link up, speed 1 Gbps Full Duplex)
Jul 16 10:06:29 Port: Port 1 status changed (link down)
Jul 16 10:05:42 Port: Port 1 status changed (link up, speed 1 Gbps Full Duplex)
Jul 16 10:05:39 Port: Port 1 status changed (link down)
Jul 16 10:04:19 Port: Port 1 status changed (link up, speed 1 Gbps Full Duplex)
Jul 16 10:04:15 Port: Port 1 status changed (link down)
Jul 16 06:58:22 Port: Port 1 status changed (link up, speed 1 Gbps Full Duplex)
Jul 16 06:58:19 Port: Port 1 status changed (link down)
Jul 16 05:30:50 Port: Port 1 status changed (link up, speed 100 Mbps Full Duplex)
Jul 16 05:30:30 Port: Port 1 status changed (link down)
Jul 16 02:08:58 Port: Port 1 status changed (link up, speed 100 Mbps Full Duplex)
Jul 16 02:08:38 Port: Port 1 status changed (link down)
Jul 16 01:50:41 Port: Port 1 status changed (link up, speed 1 Gbps Full Duplex)
Jul 16 01:50:34 Port: Port 1 status changed (link down)
Jul 15 20:18:40 Port: Port 1 status changed (link up, speed 100 Mbps Full Duplex)
Jul 15 20:18:18 Port: Port 1 status changed (link down)

Have you notice the speed is flapped between 100Mpbs and 1Gbps? Please fix the port speed on Peplink and firewall.

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