Really surprised that AS174 put in place any anti-spoofing. We are bgp-transit customer of CGNT and received traffic originated from RFC1918 on our public p2p link with them
On 15.08.2017 17:36, Ben Russell wrote: > Could someone from Cogent contact me off-list? We are having an issue with > one of our downstream customers who is multi-homed to another carrier. The > end customer is advertising their prefix to both us and the other carrier. > Both us and the other carrier peer with 174. However, if the prefix is > preferred through us and the outbound traffic flows over the other carrier it > is dropped. We suspect uRPF-strict on the other carriers Cogent link. We > are working together with the other carrier and have a ticket open the help > desk seem to be confused. Any help would be appreciated. Thanks > > > Ben Russell > Senior Network Engineer > Stratus Networks > (309)370-3174 > [logo]
