It is not necessarily true that all AT&T traffic will come in your AT&T pipe. There could be multiple AS's appended to the path and shortest will win.
I balance my BGP traffic via subnetting, break my /19 up into 32 /24's, and advertise them as I need to through my different upstreams to influence inbound traffic as some of our pipes are different sizes. I also advertise the big route /19 to all providers for fallback in case of individual link failure. Regards Michael Baird ----- Original Message ----- From: "Mike Hammett" <wispawirel...@ics-il.net> To: ro...@g5i.net, "WISPA General List" <wireless@wispa.org> Sent: Friday, January 27, 2012 3:17:26 PM GMT -05:00 US/Canada Eastern Subject: Re: [WISPA] Advertising ARIN IPs via BGP http://fixedorbit.com/AS/7/AS7029.htm Nope, Level 3 and AT&T is all they have. One they complete the migration of Paetec, they'll have a much more substantial network. http://fixedorbit.com/AS/1/AS1785.htm Cogent Verizon Sprint KDDI NTT Level 3 Global Crossing (now Level 3) Time Warner Telecom (nothing to do with Time Warner Cable) NLayer Hurricane AT&T ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com On 1/27/2012 10:56 AM, Roger Howard wrote: > This is the way it looked to me, too. I just asked the guy at > Windstream who is dealing with it. He said... > > "Windstream has two Tier 1 providers, Level 3 and AT& T . This allows > us to have two separate drains to the internet backbone. These two > providers have two separate processes for setting up the BGP sessions. > The level 3 has been completed and we are still waiting on the AT& T > piece to be completed." > > That just seems really odd to me. Surely they peer with dozens of big > providers? Do I know nothing about the way BGP works? (which is quite > possible). > > http://bgp.he.net/AS7029#_graph4 > > Also, we have an AT&T circuit, running BGP. Surely anything going to > AT&T's AS# would come in via our AT&T circuit anyway. So how does > Windstream advertising our block out via AT&T help bring traffic in > via our Windstream circuit? And by the way, our old IP blocks which > were handed to us by AT&T, are working fine and the majority of > traffic is coming in via windstream to those. So whatever they are > doing apparently works. Just seems really strange. > > On Thu, Jan 26, 2012 at 11:23 PM, Andrew W. Smith > <andrew.sm...@corp.airmail.net> wrote: >> This should have nothing to do with AT&T. It sounds like Windstream has >> incorrectly assumed that you are trying to announce something >> owned/controlled by AT&T, or did you also ask them to allow your AT&T /24s >> through as well? If so, you might be able to get them to allow the ARIN /21 >> before processing the AT&T /24s. >> >> Perhaps forwarding them the results of an ARIN whois showing you fully in >> control of that prefix could help? >> >> Sorry I couldn't help more than confirming that it doesn't appear that >> you've set anything up incorrectly with AT&T. >> >> >> On 1/26/2012 9:00 PM, Roger Howard wrote: >>> Two months ago, we received a /21 direct allocation of IPv4 addresses from >>> ARIN. >>> >>> We have two geographically diverse upstream providers. One is AT&T. >>> The other is Windstream. >>> >>> The Windstream circuit is considerably cheaper per meg, than the AT&T >>> circuit. We are wanting to do away with AT&T. >>> >>> After receiving the IP allocation, we added it to our BGP configs, and >>> contacted AT&T and Windstream to have the block advertised out to the >>> Internet. AT&T got it dealt with within a few days and traffic to >>> those IPs started flowing in. Windstream we have been fighting with >>> for two+ months to get it done. >>> >>> It's costing us thousands of dollars per month, since we can't do away >>> with the AT&T circuit until Windstream bring traffic in via their >>> circuit to these IPs. >>> >>> Windstream say they are awaiting on AT&T in order to be able to >>> advertise them. Can anyone explain to me why this could be the case? >>> What does AT&T have to do with weather I can advertise an IP block via >>> windstream or not? >>> >>> Thanks, >>> Roger >>> >>> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! 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