Fastethernet settings

cisco_trouble · ‎02-14-2007

Hi people,

My fa0/1/8 port shows "up, down". It is configured for full duplex and speed 100, however when doing a "show int fa0/1/8" it states its auto duplex, auto speed...

Why?

Thanks.

mheusinger · ‎02-14-2007

Hi,

can you please provide more informations:

Hardware? IOS version? Config of the relevant port?

Regards, Martin

cisco_trouble · ‎02-14-2007

Please find attached.

albert.remo · ‎02-14-2007

Hi!

Good day! You must have your autonegotiation enabled on this interface. Try disabling it using this series of commands:

Switch#conf t

Switch(config)#int fa0/1/8

Switch(config-if)#no negotiation auto

Hope this helps,

Regards,

Albert

Amit Singh · ‎02-14-2007

Hi,

Your line protocol is down on the interface and hence the interface is still on its default mode auto/auto. Once the interface and line protocol are up/up, it should show you Speed 100 and duplex full.

-amit singh

cisco_trouble · ‎02-14-2007

could the line protocol be afftected by the fact that the setting is "auto/auto". So basically its not possible to rectify this problem remotely...would have to visit the site.

so possible causes would be "LAN device not fuctioning or its settings in correct"

glen.grant · ‎02-14-2007

If its up/down then it is usually a physical layer problem , it is not seeing anything from the other end . Try coding the port to auto and see if it will come up , if not a site visit is going to be in the works ...