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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: route filtering in large networks
> I must not understand something. How would the banana eaters screw up > applying the same prefix-list outbound to all neighbors? Humans tend to be imprecise. Scripted actions tend to be very precise. Implementing a process by which humans manually enter configurations is prone to error and more difficult to check. Implementing a scripted, automated process that enters configurations from a text file or database is more likely to be precise and thorough. In an anecdotal case, a human going router by router to update ACL 101 is more prone to accidently skip a line in his vi list or his web list, that guides his manual logins. Another simple error that a human could make is to accidently mistakenly change cut/paste buffer. An automated computer program or script is much more likely to be precise. Notice I use the word "precise" above and not accurate. Humans may be more accurate in that they are intelligent enough to fix one-off problems. But when managing many many objects many network folks would value reliable precision over occasional accuracy. One can always manually find inaccuracies, and put algorithms for exception reports, of 'one-off situations' into a precise script. This is why many folks rightfully argue that change management should be scripted, and not entrusted to less experienced manual humans. There's a balance, and you can't have the Olivaws running amuch with their unintelligent precision. The automated processes must be well thought and audited by an intelligent, accurate human. -a
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