aggregation tool wanted
Cengiz Alaettinoglu
cengiz at isi.edu
Mon Nov 30 23:59:55 UTC 1998
Randy Bush (randy at psg.com) on November 28:
> i have a perl script which takes in the form
>
> 133.10.0.0
> 133.11.0.0
> 155.162.0.0/15
> 155.164.0.0/14
>
> and tells me that i can aggregate the first two into a /15.
>
> unfortunately, the actual data as paths can differ
>
> 133.10.0.0 2914 2907
> 133.11.0.0 2914 2907 2501
> 155.162.0.0/15 2914
> 155.164.0.0/14 2914
>
> so, what i would like is a tool which takes something like the latter syntax
> and tells me what the origin ass could aggregate. i.e. i am specifically
> not inclined to proxy aggregation at this point.
>
> Maybe CIDRadvisor does this, but I have been unable to make it do so.
CIDRadvisor requires aut-num's to be populated to figure out differing
as paths. Given the state of aut-num's in IRR, it is not a very useful
tool.
One could use as paths from a BGP route table dump. But that is only
an estimate, as two routes flap the as paths may diverge differently.
>
> randy
Cengiz
--
Cengiz Alaettinoglu Information Sciences Institute
http://www.isi.edu/~cengiz University of Southern California
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