I have never experienced a problem advertising a /24. Either from my own allocation, or for a customer who has a pre-ARIN /24.
My view would be if someone is filtering legitimate /24 routes, they have serious problems they need to fix. At one time maybe a small provider could plead old hardware with insufficient CAM memory to hold full BGP routes, but if they haven’t fixed it by now, screw ‘em. Someone tell me if I’m wrong about this. From: Mike Hammett Sent: Wednesday, August 12, 2015 8:10 AM To: [email protected] Subject: Re: [AFMUG] BGP Route Control solutions I didn't go with /24 in the example due to some people filtering /24s, so your more specific route may not show up at all. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com -------------------------------------------------------------------------------- From: "Robbie Wright" <[email protected]> To: [email protected] Sent: Wednesday, August 12, 2015 8:07:57 AM Subject: Re: [AFMUG] BGP Route Control solutions Correct, said another way, BGP prefers the most specific route. So like Mike said, if a network sees the same IP block in a /22 and as a /24, it go to the /24. Robbie Wright Siuslaw Broadband 541-902-5101 On Wed, Aug 12, 2015 at 5:07 AM, Mike Hammett <[email protected]> wrote: Yes. If you advertise a /22 out of one provider and then two /23 of that /22s out another provider, all traffic will come in the second provider. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ------------------------------------------------------------------------------ From: "Paul McCall" <[email protected]> To: [email protected] Sent: Wednesday, August 12, 2015 7:04:39 AM Subject: Re: [AFMUG] BGP Route Control solutions I had heard that if you advertise smaller IP blocks via one leg of the BGP (one provider), that that will “influence” the traffic on those blocks to come that direction. Is that true? From: Af [mailto:[email protected]] On Behalf Of Mike Hammett Sent: Tuesday, August 11, 2015 8:57 PM To: [email protected] Subject: Re: [AFMUG] BGP Route Control solutions It's been coming "soon" longer than.... >From what I can tell, Border6 is the only one that does any sort of inbound traffic manipulation. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ------------------------------------------------------------------------------ From: "Robbie Wright" <[email protected]> To: [email protected] Sent: Tuesday, August 11, 2015 11:13:12 AM Subject: Re: [AFMUG] BGP Route Control solutions Correct, but the have an inbound version in the works as well. Supposed to be Q2 of this year... Robbie Wright Siuslaw Broadband 541-902-5101 On Tue, Aug 11, 2015 at 8:56 AM, Mike Hammett <[email protected]> wrote: Noction is among those that only affect outbound. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com ------------------------------------------------------------------------------ From: "Robbie Wright" <[email protected]> To: [email protected] Sent: Tuesday, August 11, 2015 10:35:59 AM Subject: Re: [AFMUG] BGP Route Control solutions http://www.noction.com/ We trialed it and it was awesome. Under $2k a month IIRC. Robbie Wright Siuslaw Broadband 541-902-5101 On Tue, Aug 11, 2015 at 8:31 AM, Paul Stewart <[email protected]> wrote: I’ve heard mixed things … something that personally I prefer to do by hand vs having some automation take over … From: Af [mailto:[email protected]] On Behalf Of Paul McCall Sent: Tuesday, August 11, 2015 11:25 AM To: [email protected] Subject: [AFMUG] BGP Route Control solutions Is anyone using any automated functionality, software or appliance to optimize the BGP connections in/out of your network? With disparate pipe sizes, it is an interesting concept. Just reading up on the concept now Paul McCall, Pres. PDMNet / Florida Broadband 658 Old Dixie Highway Vero Beach, FL 32962 772-564-6800 office 772-473-0352 cell www.pdmnet.com [email protected]
