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New Member

Regarding 871 router

Hi all,

I have one 871 router ,and there are 4 lan port and 1 wan port ,wan port not working ,so we can configure there lan port as a wan ? also there reset button is no working or any troubleshooting tips so we can use these .. help


New Member

Re: Regarding 871 router

hi all

wan port shows ethernet up but line protocol down ,th equestion is that the port is ok or not ?

Hall of Fame Super Silver

Re: Regarding 871 router


An Ethernet interface that shows the interface up but the line protocol down is frequently because of problems with connecting the interface. Is this interface connected to something? If so what is it connected to? Can you check and verify that the cable on each end is well and firmly connected? What happens if you disconnet and reconnecct both ends of the connection?

Are you using the correct type of cable (straight through or crossover)? What happens if you change to the other type of cable?

Perhaps there is a problem with the cable that you are connecting with. What happens if you replace this cable with another cable of the same type?



Hall of Fame Super Gold

Re: Regarding 871 router

I'm no expert of the WAN port of the c871 model but if you do the command "sh interface cap", will it show you if it's MDI/MDIX?

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