Re: validating reachability via an ISP

[Don Thomas Jacob <don.thomasjacob () gmail com>]

Hi,

If you are fine with a commercial tool, Packet Design Route Explorer
product supports peering analysis:
BGP-RIB-Visualization-1.png
<https://www.packetdesign.com/wp-content/uploads/2018/02/BGP-RIB-Visualization-1.png>
is
one among its features.

https://www.packetdesign.com/solutions/peering-analysis/

Disclaimer: I work for Packet Design

Thanks,
Don

-
Don Thomas Jacob
LinkedIn <https://www.linkedin.com/in/donthomasjacob/> | Twitter
<https://twitter.com/DonThomasJacob>


On Thu, Mar 29, 2018 at 8:39 PM, Alexander Azimov <aa () qrator net> wrote:

> Hi Andy,
>
> You can use Qrator.Radar API: https://api.radar.qrator.net/.
> The get-all-paths method will return the set of active paths for selected
> prefix.
>
>
> 2018-03-29 2:22 GMT+03:00 Andy Litzinger <andy.litzinger.lists () gmail com>:
>
> > Hi all,
> >   I have an enterprise network and do not provide transit. In one of our
> > datacenters we have our own prefixes and rely on two ISPs as BGP
> neighbors
> > to provide global reachability for our prefixes.  One is a large regional
> > provider and the other is a large global provider.
> >
> > Recently we took our link to the global provider offline to perform
> > maintenance on our router.  Nearly immediately we were hit with alerts
> that
> > our prefix was unreachable and BGPMon alerted that nearly 80 AS's noted
> our
> > route had been withdrawn.  We were not unreachable from every AS, but we
> > certainly were from some of the largest.
> >
> > The root cause is that the our prefix is not being adequately
> > re-distributed globally by the regional ISP.  This is unexpected and we
> are
> > working through this with them now.
> >
> > My question is, how can I monitor global reachability for a prefix via
> this
> > or any specific provider I use over time?  Are there various
> route-servers
> > I can programmatically query for my prefix and get results that include
> AS
> > paths? Then I could verify that an "acceptable" number of paths exist
> that
> > include the AS of the all the ISPs I rely upon.  And what would an
> > "acceptable" number of alternate paths be?
> >
> >
> > thanks in advance,
> >   -andy
>
>
>
> --
> | Alexander Azimov  | HLL l QRATOR
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> | mailto: aa () qrator net
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