line protocol down - help! - newbie

[grokker99]

hi.
i am trying to establish an ethernet connection to my router. I have set ethernet0 to 12.5.52.24, and the NIC on my PC to 12.5.52.23. 255.255.255.192. when I look at ethernet0 on the router, it says that it is up but the line protocol is down. What does this mean??? How can I fix it??? please help. thanks.

 

[thenetwraith]

Bad line protocol means that the interface is administratively up , but, is unable to receive / send packets. It's most often a bad cable...

 

[wybnormal]

I beg to disagree... if the line was down.. then its a bad cable.. bad protocol tells us the line is up but the protocol can not be initiated for some reason. Incorrect bandwidth, out of memory, misconfig of DLCIs and so all lead to this.

Mike S

 

[jeter]

since Grokker99 is new lets start at he beginning .
router#(config) int e0
ip address 12.5.52.24 255.255.255.192
no shut

Now see if yo can ping your interface 12.5.52.24
From this prompt router# type ( sh arp ) this would look for
ip's on your LAN. Be sure you get a link light to your hub.
The other very important thing to remember is that your gateways are set up the same . Can you ping other pc's ?
Try these options , Good Luck !!!

 

[Guest_imported]

check your ip subnet masks then
first: do a physical check of the cable (pins) and make sure that you are using the proper cable for the proper type of connection.
second: go to int e0, do a shut then sh int you verify that both sides are down and check the control signals they should be down also.
third: go to int e0, do a no shut then wr mem when you do your no shut watch for a quick message stating that the interface is up.
fourth: sh int e0 check your control signals they should be all up if one of them is down then the problem is comming from your line. Maybe a fiber tranxcvr or bad cable.
good luck

 

[Starboy]

The most common problem in this scenario is the interface parameter "Media-type". In the ethernet environment this parameter is mandatory ( 10baset,etc. ) Try this.

Starboy

 

[jeter]

Has this been resolved ? Looking at the question again if you have a hub you need a straight cable and if it is to a PC use a cross-over cable .

WAN-ON #-)