Two BGP peering sessions on single Comcast Fiber Connection?
Jason Canady
jason at unlimitednet.us
Mon Oct 17 13:29:58 UTC 2016
I completely concur. We spread our uplinks across separate boxes and we have /29 allocations. Get the best of all worlds. But if I only had one provider, I'd want to have multiple BGP sessions for this reason.
> On Oct 17, 2016, at 08:30, Mike Hammett <nanog at ics-il.net> wrote:
>
> It really seems like it's a grave oversight to *NOT* support multiple BGP sessions. I drop to two routers for that same reason, I can do maintenance on one, while the other carries traffic.
>
>
>
>
> -----
> Mike Hammett
> Intelligent Computing Solutions
> http://www.ics-il.com
>
> Midwest-IX
> http://www.midwest-ix.com
>
> ----- Original Message -----
>
> From: "Mike Poublon" <mpoublon at secantnet.net>
> To: "rar" <rar at syssrc.com>, nanog at nanog.org
> Sent: Thursday, October 13, 2016 2:04:29 PM
> Subject: Re: Two BGP peering sessions on single Comcast Fiber Connection?
>
> I started a thread around the same topic back on 10/16 of 2014. A
> Comcast engineer (who ultimately spoke to the national product manager)
> came back after discussing and said the same thing "We don't support
> that". I got a slightly longer explanation of:
>
> --------------------------------------------
>
> In a nutshell, when we design a product we do it to accommodate the most
> typical customer cases.
> Given that the design includes a single fiber path and thus the fiber
> path and device that terminates on either end each are a single point of
> failure, adding extra BGP sessions doesn’t seem to add value in the
> typical failure scenarios. In order to achieve the simplest and most
> scalable solution to address the market, we rely on narrowing the
> possible combinations of parameters.
>
> --------------------------------------------
>
> I explained to them that their interpretation prevents me from being
> able to do concurrent maintenance on my side (single router
> reboot/upgrade, etc). Never got anywhere with it though.
>
> I'm still interested in having this set up, but have given up on it ever
> really coming to reality. Luckily ALL of my other providers were more
> than happy to set up an extra session.
>
> If anyone from Comcast is listening, there is customer demand for this.
> It's not about making it better for Comcast, it's about allowing
> customers to have more flexibility.
>
> Mike Poublon
>
> /Senior Datacenter Network Engineer/
>
> *Secant Technologies*
>
> 6395 Technology Ave. Suite A
>
> Kalamazoo, MI 49009
>
>> On 10/13/2016 1:48 PM, rar wrote:
>> After a many month wait, we were ready to turn up our BGP peering sessions on a new Comcast fiber connection.
>>
>> With our other providers (Level 3 and Verizon) we have edge routers that directly connect between the provider's on premise connection and our primary and a backup core routers. Each core router has a multihop BGP session with the provider's BGP router. The goal is to keep the single BGP router from being a single point of failure.
>>
>> Comcast said they could not support two separate BGP peering sessions on the same circuit. Does anyone have any counter examples? We used to have this setup with Comcast 5+ years ago, but now they say they can't support it.
>>
>>
>> Bob Roswell
>> broswell at syssrc.com<mailto:broswell at syssrc.com>
>> 410-771-5544 ext 4336
>>
>> Computer Museum Highlights<http://museum.syssrc.com/>
>
>
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