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Cisco 2500 problems

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7 replies

by wannab 2 views

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I recently purchased a cisco 2500 series router. I connected to the router as per instruction in my ccna study guide book (roll over cable into console port and to db9 adaptor into com1 on pc or laptop). When I do this all I get is a blinking cursor and I cannot type any input. I thought it may be a loose connection so I unplugged an replugged all connections while hyperterminal was still running and random characters were displayed when I plug the rj45 back into the console port. I thought maybe the db9 pinout is wrong but if it is correct what else could be causing this. I have also tried other solutions to other problems I found while searching techrep, such as changing baud rate to accecpt keyboard input from laptop, with no luck.

Thanks for any help

7 replies

by jc2it

I have not worked with the 2500 series, but I expect it is similar to the 2600 series.

Power down and power up the cisco while connected to the console and with hyperterm running. If everything is OK you will get the Cisco information. If you are getting garbage then start with the hyperterm settings and make sure they are correct. They should be:
Emulation: VT100
Baud rate: 9600
8 bits - No parity - 1 stop bit

If that doesn't work then try a different cable or pin out.

Oh, also make sure your Com port is really active try it with a modem or a com port tester.

If it is a USB com port or the laptop has power saving "features" turned on the com port might not be getting enough power.

by otl

Recently had same problem, appears to be pin out of the rollover cable. Using cisco supplied cable cured this problem. Being a tech I pin out the DB9 to accept standard eithernet type cables, rather than build a non-standard cable to support a standard DB9 pin out. Seems to be much easier to find an eithernet cable than to find the correct rollover cable.

by otl

Just tested my cisco cable;

DB-9 RJ45
1 NC
2 3
3 6
4 7
5 4 & 5 (obvious possible problem)
6 2
7 8
8 1
9 NC

Ohm meter / continuity tester will allow you to verify the cable and connector through put.

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