validating reachability via an ISP
aa at qrator.net
Thu Mar 29 15:09:02 UTC 2018
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
2018-03-29 2:22 GMT+03:00 Andy Litzinger <andy.litzinger.lists at 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 route had been withdrawn.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,
| Alexander Azimov | HLL l QRATOR
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