[167383] in North American Network Operators' Group
Re: Cogent & Level 3 routing issue?
daemon@ATHENA.MIT.EDU (Matthew Crocker)
Tue Dec 10 18:51:26 2013
From: Matthew Crocker <matthew@corp.crocker.com>
In-Reply-To: <4CC28F49-FB40-4945-8B30-9C7CBB9F0EA6@corp.crocker.com>
Date: Tue, 10 Dec 2013 18:50:53 -0500
To: Matthew Crocker <matthew@corp.crocker.com>
Cc: nanog <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Cogent found the problem today. It took them 4 days to do a =91show =
conf=92 and see that an outbound access-list was applied to my interface =
by mistake during a =91normal maintenance window at 8AM EST on Friday=92
4 days of jumping through hoops to prove that the problem wasn=92t on my =
network. grumble.
-Matt
--
Matthew S. Crocker
President
Crocker Communications, Inc.
PO BOX 710
Greenfield, MA 01302-0710
E: matthew@crocker.com
P: (413) 746-2760
F: (413) 746-3704
W: http://www.crocker.com
On Dec 7, 2013, at 7:58 PM, Matthew Crocker <matthew@corp.crocker.com> =
wrote:
>=20
> On Dec 7, 2013, at 3:40 PM, Jason Canady <jason@unlimitednet.us> =
wrote:
>=20
>> Unfortunately Cogent has a lot of peering issues. We use them in our =
network blend and we have been having lots of problems with traffic =
outbound to Comcast. It looks like from South Bend, Indiana on Cogent =
to Chicago / Level 3 we are getting a very tiny amount of packet loss =
and a higher than 'normal' latency of 35ms+.
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> Yeah, I know they are always my secondary, never my primary
>>=20
>> Where are you connected to Cogent at? And what destination are you =
going to on Level 3?
>>=20
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> Boston (300 Bent) but I think they haul it to 1 Summer St
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> A bunch of sites fail but www.cnn.com is one that comes to mind.
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>> Best Regards,
>>=20
>> --=20
>>=20
>> Jason Canady
>> Unlimited Net, LLC
>> Responsive, Reliable, Secure
>>=20
>> www.unlimitednet.us
>> jason@unlimitednet.us
>> twitter: @unlimitednet
>>=20
>> On 12/7/13 3:14 PM, Matthew Crocker wrote:
>>> Anyone seeing issues between Cogent & Level3 in NYC?
>>>=20
>>> I have Sprint & Cogent for bandwidth. Everything has been humming =
along for a couple years just fine. Yesterday around 8:00AM my BGP =
session with Cogent flapped. Now, when my Cogent BGP is up I get 100% =
packet loss in level3 land. When Cogent BGP is down (i.e. I=92m running =
solely on Sprint) Everything is fine.
>>>=20
>>> I have an open ticket with Cogent. They say they have a =91capacity =
issue=92 with level3 that has been escalated to executive levels.
>>>=20
>>> With Sprint & Cogent BGP UP
>>> I see traceroutes showing traffic leaving me on Sprint but returning =
on Cogent (and failing at level3). I=92m guessing it is the =
level3/cogent border
>>>=20
>>> With Sprint UP & Cogent Down
>>> I see trace routes showing traffic on to/from on Sprint just fine.
>>>=20
>>>=20
>>> Anyone else having issues?
>>>=20
>>> -Matt
>>>=20
>>> --
>>> Matthew S. Crocker
>>> President
>>> Crocker Communications, Inc.
>>> PO BOX 710
>>> Greenfield, MA 01302-0710
>>>=20
>>> E: matthew@crocker.com
>>> P: (413) 746-2760
>>> F: (413) 746-3704
>>> W: http://www.crocker.com
>>>=20
>>>=20
>>>=20
>>>=20
>>=20
>>=20
>>=20
>=20
