[165064] in North American Network Operators' Group
Re: will ISP peer with 2 local WAN routers?
daemon@ATHENA.MIT.EDU (Peter Kristolaitis)
Fri Aug 16 17:30:13 2013
Date: Fri, 16 Aug 2013 17:29:42 -0400
From: Peter Kristolaitis <alter3d@alter3d.ca>
To: nanog@nanog.org
In-Reply-To: <01a101ce9ac6$8c4d4780$a4e7d680$@webjogger.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
But the switches themselves are a single point of failure, so if a
switch dies you still only have a single provider (assuming one switch
per provider). ;)
All you're doing is moving the your single point of failure from the
routers to the switches, with arguably very little increase in actual
reliability (if any, depending on whether you think switches are less
likely to fail than routers).
- Pete
On 08/16/2013 05:21 PM, Adam Greene wrote:
> Thanks, Justin. Yes, we considered that option, too. But then if one WAN
> router goes down, the customer will only have connectivity through a single
> upstream provider. We'd prefer to maintain connectivity to both even if a
> router fails. Switches in front of the routers is no problem.
>
> -----Original Message-----
> From: Justin Vocke [mailto:justin.vocke@gmail.com]
> Sent: Friday, August 16, 2013 4:47 PM
> To: Adam Greene
> Cc: <nanog@nanog.org>
> Subject: Re: will ISP peer with 2 local WAN routers?
>
> The gotcha with that is then you need a switch in front of the routers. I'd
> just setup a carrier on each router and run ibgp between.
>
> Sent from my iPhone
>
> On Aug 16, 2013, at 3:35 PM, "Adam Greene" <maillist@webjogger.net> wrote:
>
>> Hi guys,
>>
>>
>>
>> I have a customer who peers via eBGP with Lightpath aka Cablevision
>> (AS
>> 6128) and Level3 (AS 3356) and wants to do some dual-WAN router
> redundancy.
>>
>>
>> I have heard that carriers will sometimes agree to set up a /29 WAN
>> subnet for a customer and peer with (2) customer routers.
>>
>>
>>
>> The customer is delaying on providing me with the proper circuit ID &
>> contact information to be able to call Lightpath and Level3 directly
>> and find out if they will do this, so I thought of asking this list.
>>
>>
>>
>> Is anyone aware if Lightpath and Level3 will agree to something like this?
>>
>>
>> Thanks,
>>
>> Adam
>>
>>
>>
>>
>>
>
