Issue: Cisco Router Link Light Blinking Orange
The link light blinking orange on a Cisco router indicates a duplex mismatch error. In telecommunication, a duplex communication system refers to point-to-point communication and there are two types, namely full-duplex and half-duplex. In the half-duplex communication, only a single port can send or receive data at a time. On the other hand, in full-duplex, all nodes can send and receive data simultaneously. Continue reading this page to fix the issue
Cisco router link light blinking orange.
Cisco's Router Link Light Blinking Orange Color
To fix the blinking orange link light on your Cisco router, follow the steps mentioned below.
Before starting, verify whether you have properly connected the network cable between the router and the switch.
If necessary, restart the router and reconnect the network cable to fix Cisco router link light blinking orange issue.
Next, enter into the global configuration mode of the router using the ‘S1# ’ command. configure terminal
Use the ‘S1(config)# ’ command to enter the interface configuration mode. interface fastethernet 0/1
Configure the interface duplex mode using the ‘S1(config-if)# ’ command. duplex full
Next, type the ‘S1(config-if)# ’ command to configure the interface speed. speed 100
Once completed, return to the privileged EXEC mode using the ‘S1(config)# ’ command. end
To save the running configuration to the startup configuration, enter the ‘S1# ’ command in the copy running-config startup-config Terminal window.
Doing so will fix the link light blinking problem on your Cisco router.
If the problem persists, enable the auto-MDIX (automatic medium dependent interface crossover) feature.
To do so, enter into global configuration mode and interface configuration mode.
Use the ‘S1(config-if)# ’ command to configure the interface to negotiate the duplex mode with the connected device automatically. duplex auto
To automatically negotiate the speed with the connected devices, enter the ‘S1(config-if)# ’ command. speed auto
To enable the auto-MDIX feature, enter ‘S1(config-if)# ’ in the mdix auto Terminal window.
To exit and return to the privileged EXEC mode, enter ‘S1(config)# ’ in the end Terminal window.
To save the running configuration to startup configuration, use the ‘S1# ’ command. copy running-config startup-config
This will fix the Cisco router link light blinking orange issue.