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Re: Operational question: Building filters from IRRdbs

  • From: Cengiz Alaettinoglu
  • Date: Tue Jan 05 20:12:16 1999

It seems like the mirroring of ripe db at Merit is broken. Can someone
from Merit look into this?

Alex Bligh ([email protected]) on January 3:
> Here's a couple of operational questions for those who build
> filters from IRRdb's.
> 
> Background:
> 
> * peval / rpsl.merit.edu *may* be incorrectly evaluating
>   RIPE database entries currently - but this isn't my main
>   thrust. The scary thing is suddenly what I'm 99% sure used
>   to work (expanding AS Macros) now silently fails if they
>   are in RIPE. [for details see the end]
> 
> * I'm not saying the server is broken (I guess it has something to
>   do with the 'server is running at low priority' line), but if I had
>   this in an automatic filter generating run, it would generate
>   the RADB stuff just fine, and silently filter out all RIPE based
>   peerings. Even if it's working perfectly correctly, the questions
>   are still interesting, at least to me.
> 
> Questions:
> 
> * Does anyone actually do build filters without running
>   their own complete database mirror, i.e. do they rely real
>   time on a database working. If so, which one?
> 
> * Does anyone let this config their routers automatically? To peers
>   customers, transits, or all three? Or do you rely on humans to
>   reinstall the lists once autogenerated?
> 
> * If it's just a fact of life that occasionally this thing turns up duff
>   data, and if people are in general doing automatic installation, what
>   data validation heuristics are used?
> 
> I'll summarize to the list any off-list replies that are interesting.
> 
> --
> 
> Alex Bligh
> GX Networks (formerly Xara Networks)
> 
> Boring details:
> 
> [ If anyone from merit/isi is interested this is peval (RAToolSet v4.3.1)
>   binaries from the isi site running on Solaris 2.5.1 and I'm
>   sure it was working a little while ago.
> 
>   I can't get peval to produce anything sensible at the moment
>   for anything in a database other than RADB. For instance:
> 
>     opal[amb].158$ ./peval -no-as -T all AS-EUNET
>     Whois: Open rpsl.merit.edu, 43, RADB,MCI,RIPE,ANS,CANET
>     Whois: WriteQuery -V RAToolSet4.3.1 --single --silent -k -r -s
>        RADB,MCI,RIPE,ANS,CANET -u -T as-set AS-EUNET
>  
>     Whois: Response 
>     % RIPEdb(3.0.0a13) with ISI RPSL extensions
>  
>     % Server is running at low priority for -M, -m and -k queries
>  
>     % No entries found in RADB, MCI, RIPE, ANS and CANET database.
>  
>     NOT ANY
> 
>   A 'whois -h whois.ripe.net AS-EUNET' demonstrates that this isn't
>   in fact the case.
> 
>   Works for anything in RADB, including my macros which are in both.
> 
>   As I said, I'm not saying the server is broken (I guess it has something to
>   do with the 'server is running at low priority' line), but if I had
>   this in an automatic filter generating run, it would generate
>   the RADB stuff just fine, and silently filter out all RIPE based
>   networks
> 
> ]
> 
> -- 
> Alex Bligh
> GX Networks (formerly Xara Networks)
> 


Cengiz

-- 
Cengiz Alaettinoglu           Information Sciences Institute
http://www.isi.edu/~cengiz    University of Southern California