Tag :: Flowspec

EOS 4.21.3F introduces support for BGP Flowspec, as defined in RFC5575 and RFC7674. The typical use case is to filter or redirect DDoS traffic on edge routers.

This feature enables Flowspec rules to be leaked from one VRF to another. When combined with the ability to apply Flowspec rules from one VRF to interfaces in another VRF, this feature makes it possible to combine rules from different source VRFs into a target VRF, and apply the target VRF’s rules on the interfaces of the source VRFs.

Currently, EOS supports the receiving and transmitting of BGP Flowspec rules. Rules received can be installed locally as ACLs and/or transmitted to other BGP peers/route reflectors. EOS relies on external controllers to inject these flowspec rules. The feature will allow flowspec rules to be defined via CLI in a similar fashion as traffic-policies is currently done. These policies would then be redistributed into BGP. Once redistributed, the rules can be advertised to other BGP peers and optionally installed locally on the configured system.