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Cisco IOS Questions

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Last Modified: 2010-04-11
I have been out of working with Cisco for years.  I have a few questions from a basics standpoint.

1.  If you have saved a config (Copy run start), how do you kill that configuration?  Erase Start ?  I remember that you can erase the IOS completely and be back at a register config if you aren't careful.

2.  If you are dealing with a Back to Back serial config, say a 2514 and 2620, and the DCE side is on the 2514....  Let me just tell you what's happening and you tell me what you think.  --  I have a 2514 and a 2620 - When I configure the serial ports, I configure the clock at 1000000 on the 2514 and an IP of 192.168.5.2 /30 and on the other I have 192.168.5.3 /30 *forgive me if that's not exactly right.  Not positive about the IP's as I'm not in front of the router.  But the subnets are correct and they do ping* - But with that is my question.  The link seems to be flapping.  The interface goes UP and DOWN, UP and DOWN.  Over and over and over.

Any ideas?

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Top Expert 2004
Commented:
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Hollmer;

1: ) you just simply do router#write erase    then you reload the router.... The config will be gone the IOS will be intact.
2:) The router could be having a clocking issue... what Cables are you using cab-v.35-DTE and v.35 DCE ???  or do you have an internal CSU in the 2620 with an external on the 2514?   First thing check the cable connections and make sure your clock source is set to internal on the DCE side and the clock source is set to LINE on the DTE side.

Hope this helps

Scott

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Commented:
pseudocyber,

So you are SURE that this won't dump the IOS when you do a erase start ???

Thanks, Scotty for the assist.

Author

Commented:
If that's the case, how do you erase the IOS?  Because I know that I have screwed up in the past and done that.
erase flash

Author

Commented:
How do I give you the assist, Scotty?  I appreciate your help.
I have only ever posted 2 questions and only had 1 answered so ... I have no Idea LOL

Author

Commented:
Well thanks for your help anyway.  I really do appreciate it.
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