The answer is usually on CCO if you can find it. Start with this:
http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm
down, down is not good. Take care of the physical connectivity first. up,
down at least says that you have layer one. Use the show controllers s 0
(notice the space between the "s" and the "0". In older IOS that needed to
be there.) to verify the the interface sees the cable. You'll want the same
encapsulation on both ends. Default is HDLC. Verify that with a show int s0.
Once you have a link use show cdp neighbor to see the other end. IP doesn't
have to be working. You may have an addressing problem. Make a list of every
possible problem that you can imagine. Write down the steps that you think
will lead to verifying that condition as correct or not. Start
troubleshooting. If you fix a real problem and yet the link doesn't work -
continue troubleshooting. There may be two problems. Let me digress ....
A farmer in Vermont met his friend in the General Store. He said that he had
a problem. A skunk had wandered into his house. He wanted to get rid of it;
but didn't want to get sprayed. "No problem!", said his friend. "Skunks love
carrots. Buy a bunch of carrots. Cut them into small pieces and make a trail
from the house into the woods. Use a board to make a ramp down your front
steps. The skunk will start eating the carrots and soon will march right out
of the house." Several days later they met at the store. "You're right" the
farmer said,"skunks love carrots." "So you got rid of him", said the friend.
"No, now I've got two skunks!" was the reply.
Sometimes you've got two skunks. Believe in your troubleshooting abilities
and keep going. Good luck.
> -----Original Message-----
> From: Charles Paver [mailto:[EMAIL PROTECTED]]
> Sent: Sunday, January 28, 2001 6:38 PM
> To: [EMAIL PROTECTED]
> Subject: 2502 router problem
>
>
> Hi. Im practicing at home, and am encountering the
> following problem:
>
> I have one 2502 router, has 1 t.ring port and 2 serial
> ports
>
> Also, have one 2513 with 2 aui ports, 2 serial ports.
>
> Now, Both of these guys are connected via serial port.
> serial0 on the 2513 is going to serial1 on the 2502.
> I can ping the 2502 FROM the 2513 successfully, but
> cannot ping the 2513 FROM the 2502. Also, I made sure
> that they are on the same network and using the same
> subnet.
> The 2502 router has the dce end of the cable, so I set
> the clock rate at 64000 and the bandwidth at 64.
> However, I did not do anything with the 2513!
>
> The subnets are identical, and both start with
> 192.168.0. I also set the telnet password, line vty 0
> 4, login, password xxxxx.
>
> And when I typed in show interface (using the console
> cable) on the 2502, it says down,down. Both routers
> are turned on. Im wondering if I can telnet into a
> router if I have the console port plugged in via
> hyperterminal simultaneous, while trying to telnet
> FROM router to router?
>
> Now, the 2502 cannot be put on the ethernet, I
> understand. But should nt I be able to telnet into it
> from the 2513? I can ping successfully one way! The
> other way says 0 percent.
>
> Thanks!
>
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