Rates on all interfaces working in auto-negotiation mode are different on a WLAN device

When all interfaces of a WLAN device work in auto-negotiation mode, the negotiated rate is the maximum rate supported by the interfaces. However, an interface may negotiate a rate of 100 Mbit/s with a peer interface, while other interfaces negotiate a rate of 1000 Mbit/s with peer interfaces.
The possible cause is that the Ethernet cable connecting the GE interfaces on the local and peer devices cannot support a high working rate due to deterioration or RJ-45 connector faults. Therefore, the negotiated rate can only be 100 Mbit/s or 10 Mbit/s.
In this case, replace the Ethernet cable.

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