Peakflow: When traffic to a certain IP reaches 1 Gbps it automatically BGP blackholes the destination IP

Radware: Cleans the traffic up to 5 Gbps and if again reaches to 5 Gbps then peakflow blocks again.

Partnering with Radware for DDoS Protection
https://www.kentik.com/partnering-with-radware-for-ddos-protection/

http://www.radware.com/Partners/TechnologyPartners/Kentik/

PenTeleData Chooses Radware for DDoS Attack Mitigation
https://www.radware.com/newsevents/pressreleases/penteledata-chooses-radware-ddos-attack-mitigation/

Peakflow solution data sheet
https://www.arbornetworks.com/images/DS_PeakflowSolution_EN2015.pdf

https://www.arbornetworks.com/ddos-protection-products

Peakflow SP user guide
http://www.cathaycenturies.com/blog/wp-content/uploads/2013/07/PSP_UG_500.pdf

Remotely triggered black hole
http://www.cisco.com/c/dam/en_us/about/security/intelligence/blackhole.pdf