On 8 Jun 2015, at 17:57, Ramy Hashish wrote:
a BGP session has to be established over a GRE tunnel over the
internet between the ISP/NSP/DC and the cloud scrubbing center,
This is incorrect.
In most cloud overlay DDoS mitigation scenarios (e.g., end-customer
obtains service from an MSSP which isn't providing them with transit),
a) there is no BGP relationship whatsoever between the end-customer and
the MSSP, and b) the GRE tunnel is used strictly for re-injection of
clean traffic (i.e., post-mitigation) to the end-customer.
In some scenarios, DNS is also used in place of/in addition to BGP-based
diversion.
But GRE is used for re-injection only.
-----------------------------------
Roland Dobbins <rdobb...@arbor.net>