Will I receive blackholes which other customers only advertise to rs1/rs2 on my session to the Blackholing route server?
Yes. All route servers automatically exchange blackholes with each other.
Do I need to send my blackholes to both rs1/rs2 and the Blackholing route server?
No. All route servers automatically exchange blackholes with each other. However, the preferred way is to only announce blackholes to rsbh.
Why do I have to set the BLACKHOLE community or the Blackhole next-hop on my announcements to the Blackholing route server as well?
This is a safety measure as omitting to do so would otherwise result in immediate blackholing of all your (maybe accidentally) announced prefixes. Please note that announcing a prefix to both rs1/rs2 and rsbh will result in blackholing of this prefix if the BLACKHOLE Community and/or Blackholing next-hop is set on the session towards rsbh.
Do I have to allow up to /32 (IPv4) and and up to /128 (IPv6) on my sessions to rs1/rs2 as well?
No. If you peer with the Blackholing route server in Frankfurt, you can keep your existing filters in place and allow up to /32 (IPv4) and to /128 (IPv6) on the Blackholing route server sessions.
What kind of prefixes do I receive from the Blackholing route server?
The Blackholing route server will only announce blackholes (i.e., prefixes blackholed by other peers).
Should I filter the blackholes received from the Blackholing route server?
No. Please accept all blackholes from the Blackholing route server for the service to work correctly. This includes IPv4 prefixes up to /32 and IPv6 prefixes up to /128.
At which locations is the DE-CIX Blackholing route server available?
The Blackholing route server (rsbh) is available at DE-CIX Frankfurt and in Dubai.
At which locations is the Blackholing route server service available?
The Blackholing route server (rsbh) is available at DE-CIX Frankfurt and in Dubai. Have a look at our FAQs for the Blackholing route server below.
At which locations is the Blackholing service available?
Blackholing is available at all DE-CIX exchanges, except Berlin, Moscow, and the Internet Exchanges in Asia.
Do I have to pay to use the Blackholing service?
No, Blackholing is free of charge for customers who use the GlobePEER service.
How can I see if my blackhole announcement is accepted by the route servers?
You can check this in the DE-CIX Looking Glass. By entering the blackhole prefix into the global search field, you can get an overview of the networks announcing this blackhole prefix, as well as the route servers and therewith the exchanges where the prefix is visible at.
Can I selectively announce blackholes?
Yes, standard DE-CIX route server BGP control communities apply to blackholes as well. You can e.g. signal a blackhole to all route server peers except AS64501 by setting the following communities: (6695:6695) where 6695 is the AS of the DE-CIX route servers in Frankfurt. Replace this to the corresponding route server AS of each DE-CIX…
