Re: Comcast route server not reflecting their reality

2019-09-11 Thread Ross Tajvar
> > IIRC, Comcast uses "local-as 7922" path rewriting for all enterprise EDI > customers > running BGP off of regional CRANs, unless I'm mistaken. So if your > regional CRAN > is as7015 (for New England), even if your physical circuit and BGP session > land > on a local SUR in your area, you have

Re: Comcast route server not reflecting their reality

2019-09-11 Thread James Jun
On Wed, Sep 11, 2019 at 12:29:58PM -0400, Ross Tajvar wrote: > > I'm curious how this works and why it's done this way. I have a friend who > has transit from AS7922 (the remote AS in his BGP sessions are all 7922), Are you sure your friend has transit from as7922? It sounds like your friend is

Re: Comcast route server not reflecting their reality

2019-09-11 Thread Ross Tajvar
> > Unlike AS2914 which purely interconnects with AS7922, it seems that AS3356 > also has direct interconnections to the various Comcast subsidiary > networks which are hidden from the DFZ through no-export communities. I'm curious how this works and why it's done this way. I have a friend who ha

Re: Comcast route server not reflecting their reality

2019-09-11 Thread Will Orton
On Tue, Sep 10, 2019 at 04:42:10PM +, Martijn Schmidt wrote: > Hi Will, > > Unlike AS2914 which purely interconnects with AS7922, it seems that AS3356 > also has direct interconnections to the various Comcast subsidiary networks > which are hidden from the DFZ through no-export communities..

Re: Comcast route server not reflecting their reality

2019-09-10 Thread Martijn Schmidt via NANOG
server not reflecting their reality I'm seeing odditiies when trying to traffic-engineering my way around an AS 3356-to-7922 performance issue. I buy transit from 3356 and announce my /19 to 3356. I set traffic engineering community 65000:7922 to supress announcement of it from 3356 to 7922. W

Comcast route server not reflecting their reality

2019-09-10 Thread Will Orton
I'm seeing odditiies when trying to traffic-engineering my way around an AS 3356-to-7922 performance issue. I buy transit from 3356 and announce my /19 to 3356. I set traffic engineering community 65000:7922 to supress announcement of it from 3356 to 7922. When I do that, at route-server.newyork