Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Christopher Morrow
On Fri, Apr 13, 2018 at 10:35 PM, Randy Bush wrote: > > I believe we've seen bogus low AS number announcements a few times > > before, and they've usually been caused by attemts to configure > > AS path prepending without understanding and/or reading the docs. > > > > Someone might have wrongly a

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Randy Bush
> I believe we've seen bogus low AS number announcements a few times > before, and they've usually been caused by attemts to configure > AS path prepending without understanding and/or reading the docs. > > Someone might have wrongly assumed that > >set as-path prepend 133711 133711 > > coul

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Job Snijders
Dear Jason, On Fri, Apr 13, 2018 at 02:17:47PM -0400, Jason S. Cash wrote: > Yes, ASN2 sees about 1-4 configuration related "rogue" announcements > per month. What is going on right now does not appear to be a small > misconfiguration. > > The only route we (University of Delaware) are annou

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Jason S. Cash
On Fri, 13 Apr 2018, Bjørn Mork wrote: Date: Fri, 13 Apr 2018 10:13:47 +0200 From: Bjørn Mork To: Anurag Bhatia Cc: North American Network Operators' Group Subject: Re: IPv4 and IPv6 hijacking by AS 6 Anurag Bhatia writes: Similar for AS2. I believe we've seen bogus low AS number annou

Weekly Routing Table Report

2018-04-13 Thread Routing Analysis Role Account
This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG, IRNOG and the RIPE Routing WG. Daily listings are sent to bgp-s

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread David Hubbard
Unfortunately, that's how it's done in route policy on XR, so people bouncing between flavors can easily make that mistake. On 4/13/18, 4:15 AM, "NANOG on behalf of Bjørn Mork" wrote: Anurag Bhatia writes: > Similar for AS2. I believe we've seen bogus low AS number anno

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Theodore Baschak
> On Apr 13, 2018, at 12:27 AM, Vincent Bernat wrote: > > Maybe AS6 is used internally by the next AS on the path? I've definitely seen (and sadly, interacted with) operators that solved their "why doesn't non-meshed iBGP do what I'm expecting" problems by simply using different low-numbered

Re: IPv4 and IPv6 hijacking by AS 6

2018-04-13 Thread Bjørn Mork
Anurag Bhatia writes: > Similar for AS2. I believe we've seen bogus low AS number announcements a few times before, and they've usually been caused by attemts to configure AS path prepending without understanding and/or reading the docs. Someone might have wrongly assumed that set as-path p