For line protocol to be up, the interface must be connected to a neighbor, configured correctly, and not administratively down.
If this is a serial connection then you need the following: 1. Correct cabling (back-to-back cables) 2. Clocking, provided by the router with the DCE cable attached. 3. Datalink protocols must be the same on each side. The default is HDLC but you can also use PPP or Frame Relay back to back, although frame relay requires a little extra configuration to do back-to-back. When you do a show interface you see the following: Router#sho int s0 Serial0 is up, line protocol is down The first part of that line refers to the state of the physical layer (cabling and clocking.) The second part refers to the datalink layer connection. For the datalink layer to be UP, the router must be talking to a neighbor that is speaking the same language. HTH, John ________________________________________________ Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag ---- On Thu, 10 Jan 2002, Stephane Wantou Siantou ([EMAIL PROTECTED]) wrote: > Hi everybody, > > Can anybody tell me how to turn "line protocol up" on an interface? > Thanks, > Stephane [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=31614&t=31611 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
