11-16-2007 06:22 AM - edited 03-03-2019 07:34 PM
What are the usual issues when an interface (ethernet) is in an UP/DOWN status . DOWN = Protocol. Would it show this status if nothing was plugged in to the ethernet port..
Thanks
11-16-2007 07:44 AM
If it is "ethernet down, line protocol down", then a physical layer problem like cable not connected.
If only protocol is down, then check if this interface on other connecting device is UP, duplex & speed is matching, encapsulation on both ends is same.
Pls rate if helped.
11-16-2007 07:50 AM
BVS
Your response is quite appropriate for a back to back serial connection. But not so much for an Ethernet, which I believe was the focus of the original post.
Dan
For an Ethernet to be up/down could be caused by having nothing plugged into the Ethernet interface, or from a speed mismatch on the connection.
HTH
Rick
11-16-2007 08:29 AM
Hi,
Just one small point, the above holds true for the Routers (and the HWIC LAN Cards on a router) however if its a catalyst switch the chances are that it will show an "Error-Disabled Stat"
You may refer the following URL for further info:
http://cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml
Regards,
Wilson Samuel
PS: Please rate all helpful posts
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