To make the blackholing process more flexible and granular, ISPs and network operators leverage BGP (Border Gateway Protocol) communities. BGP communities allow network administrators to tag routes and distribute them to specific peers or customers. This enables more precise policy control and facilitates customer-triggered blackholing, where the network operator can give customers the ability to blackhole unwanted traffic on their own.
By utilizing BGP blackholing, network operators are able to rapidly and efficiently mitigate the effects of a DDoS attack. When traffic is blackholed, it is dropped at the network edge, preventing it from reaching its intended target. This not only protects the targeted IP addresses but also reduces the strain on the network infrastructure, enabling legitimate traffic to flow smoothly.
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