nanog mailing list archives
Re: Cisco config checker
From: Phil Howard <phil () whistler intur net>
Date: Mon, 4 Jan 1999 12:17:04 -0600 (CST)
S.J.Brannon wrote:
We have suggest to Cisco that if this tool is to be usable it must be in step with the IOS releases and regression tested.
IOS has inside a data representation of what it things the configuration is (or should be). It read it in and it can write it back out. It is that internal data structure, as complex and messy as it probably is, having parts of the data scattered in so many modules, that really could represent the delta. Perhaps the only reliable way to do this is to do it inside IOS itself. With a new semantic of a config load that would mean "replace the old config entirely with this config" (as opposed to the existing semantic "merge this config with the old config") and the IOS would do the right thing, this might work. It would be a little bit more black magic, but it would beat having to keep two different IOS config interpreters in sync (the real IOS and the external tools).
This tool can never tell if the real network will work
I don't think this problem will ever be truly solved by any means other than the ones we use now (check it the best you can, have a fallback plan, and go for it at a time of least disruption). -- -- *-----------------------------* Phil Howard KA9WGN * -- -- | Inturnet, Inc. | Director of Internet Services | -- -- | Business Internet Solutions | eng at intur.net | -- -- *-----------------------------* philh at intur.net * --
Current thread:
- RE: Cisco config checker S.J.Brannon (Jan 05)
- <Possible follow-ups>
- Re: Cisco config checker Enke Chen (Jan 05)
- RE: Cisco config checker S.J.Brannon (Jan 05)
- Re: Cisco config checker Phil Howard (Jan 05)
- Re: Cisco config checker Alex P. Rudnev (Jan 05)
- Re: Cisco config checker Phil Howard (Jan 05)
- Cisco config checker Pete Kruckenberg (Jan 05)
- Re: Cisco config checker Alex P. Rudnev (Jan 05)
- RE: Cisco config checker James D. Wilson (Jan 05)
- RE: Cisco config checker Thomas Novak (Jan 05)
- RE: Cisco config checker Randy Bush (Jan 05)
- Re: Cisco config checker Phil Howard (Jan 05)
- RE: Cisco config checker Alex P. Rudnev (Jan 05)
- RE: Cisco config checker Randy Bush (Jan 05)
- Message not available
- Re: Cisco config checker Tony Tauber (Jan 05)