On Fri, 2 Oct 2015, Marco Paesani wrote:
Hi, probably this route is wrong, see RFC 6598, as you can see:
show route 100.64.0.0/10
inet.0: 563509 destinations, 1528595 routes (561239 active, 0 holddown, 3898 hidden) + = Active Route, - = Last Active, * = Both
100.100.1.0/24 *[BGP/170] 2d 14:46:05, MED 100, localpref 100 AS path: 5580 9498 9730 I, validation-state: unverified > to 78.152.54.166 via ge-2/0/0.0
My guess is someone leaking an internal route. It's not uncommon to see people using random IPv4 space for internal purposes. Ranges such as 100.100.x.0/24 or 20.20.x.0/24 are often mis-used in this way. It also looks like at least one of their upsteams is not filtering out any advertisements from 100.64/10. jms