> On Feb 24, 2017, at 10:26 AM, Mike Horwath <[log in to unmask]> wrote:
> On Fri, Feb 24, 2017 at 08:56:33AM -0600, Andrew Hoyos wrote:
>> 36040 is a customer of HE.net in MSP, so you'd need to send those to
>> HE as well if you peer with them or are a customer. Otherwise they
>> will learn your prefixes that way too, sans communities.
> Why is a customer sending other peoples' routes into HE to then go
> into the exchange?
36040 is a customer of HE.net. So, HE.net is sending them a full table or some subset (including their peers and customers), as expected.
In turn, HE.net will advertise to *you*, their customer routes (including 36040, note the _6939_36040 path there), being learned via HE.net
220.127.116.11/24 *[BGP/170] 19:20:53, MED 0, localpref 200
AS path: 6939 36040 I, validation-state: unverified
> to 18.104.22.168 via xe-0/0/0.0
Just saying, that if you depeer 36040, or add communities on a bilateral session to them, you’ll need to do the same if peering with HE.net or a customer of HE.net, as 36040 will learn your prefixes from 6939 too.