nanog mailing list archives
RE: Cogent input
From: "Zak Thompson" <zak () yellowfiber net>
Date: Thu, 11 Jun 2009 10:08:19 -0400
Overall I can't say cogent has been bad. They have been great with support and getting things completed. As far as outages go, maintenance here and there but they always give ample time via email on planned outages. Their network has improved a lot over the years and most customers can't tell if they are on cogent or Level3 for the most part. But as with every network no one single carrier will get the job done "the best". I can't think of the last.. unexpected outage we had in our POP with cogent. Overall recommended carrier now a days. Cost in terms of performance, you can get competitive rates from Level3 and a chunk of the tier2's out there that will go lower than cogents standard pricing model. Most seem to be in the same ball park +-1/Mbps. Zachary A. Thompson -----Original Message----- From: Bret Clark [mailto:bclark () spectraaccess com] Sent: Thursday, June 11, 2009 10:17 AM To: NANOG Subject: Re: Cogent input I hate when these questions get asked, because as the saying goes..."a person happy with a service will only tell one other person, but a person unhappy with a service with tell ten other people". So I think a lot of times you'll get skewed responses...but with that said, we've been using Cogent now for a year and no complaints at all. Had some minor downtime back in April due to a hardware failure, but Cogent responded extremely quickly, scheduled an emergency maintainance and had us running rather quickly. Face it, hardware problems happen so I can't blame Cogent on the failure. The few times I've dealt with their tech support group I found 99% of them very knowledgeable and I know that when we initially turned on the link they went the extra mile to resolve some initial problems during the weekend time frame. My 2 cents and with any provider mileage will vary, Bret On Thu, 2009-06-11 at 15:01 +0100, Andrew Mulholland wrote:
At $JOB-1 we used Cogent. Lots of horror stories had been heard about them. We didn't have such problems. Had nx1Gig from them. On the few occasions where we had some slight issues, I was happy to be able to get through to some one useful on the phone quickly, and not play pass the parcel with call centre operatives. and at least in the quantities we were buying they were significantly better value than others, which was the primary reason we went with them. andrew On Thu, Jun 11, 2009 at 2:55 PM, Paul
Stewart<pstewart () nexicomgroup net> wrote:
Our experience with them was at least one major (longer than an
hour)
outages PER MONTH and many of those times they were black holing our routes in their network which was the most damaging aspect. The
outages
were one thing but when our routes still somehow managed to get advertised in their network (even though our BGP session was down)
that
really created issues. I have heard from some nearby folks who
still
have service that it's gotten better, but we are also in the
"regional
offering" when it comes to IP Transit and have sold connections to
many
former Cogent customers who were fed up and left. I have found with Cogent that you will get a LOT of varying opinions
on
them - there are several other players (at least in our market) that
are
priced very similar now and have a better history behind them..... The specific de-peering issues never effected us much due to enough diversity in our upstreams and a fair amount of direct/public
peering...
Thanks, Paul -----Original Message----- From: Justin Shore [mailto:justin () justinshore com] Sent: Thursday, June 11, 2009 9:47 AM To: NANOG Subject: Cogent input I'm in search of some information about Cogent, it's past, present
and
future. I've heard bits and pieces about Cogent's past over the
years
but by no means have I actively been keeping up. I'm aware of some (regular?) depeering issues. The NANOG archives
have
given me some additional insight into that (recurring?) problem.
The
reasoning behind the depeering events is a bit fuzzy though. I
would be
interested in people's opinion on whether or not they should be
consider
for upstream service based on this particular issue. Are there any reasonable mitigation measures available to Cogent downstreams if (when?) Cogent were to be depeered again? My understanding is that
at
least on previous depeering occasion, the depeering partner simply null-routed all prefixes being received via Cogent, creating a
blackhole
essentially. I also recall reading that this meant that prefixes
being
advertised and received by the depeering partner from other peers
would
still end up in the blackhole. The only solution I would see to
this
problem would be to shut down the BGP session with Cogent and rely
on a
2nd upstream. Are there any other possible steps for mitigation in
a
depeering event? I also know that their bandwidth is extremely cheap. This of course creates an issue for technical folks when trying to justify other upstream options that cost significantly more but also don't have a damaging history of getting depeered. Does Cogent still have an issue with depeering? Are there any reasonable mitigation measures or should a downstream customer do
any
thing in particular to ready themselves for a depeering event? Does their low cost outweigh the risks? What are the specific risks? Thanks Justin
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Current thread:
- Cogent input Justin Shore (Jun 11)
- RE: Cogent input Paul Stewart (Jun 11)
- Re: Cogent input Andrew Mulholland (Jun 11)
- Message not available
- Re: Cogent input Mike Tancsa (Jun 11)
- Re: Cogent input Marshall Eubanks (Jun 11)
- Re: Cogent input Andrew Mulholland (Jun 11)
- Re: Cogent input Bret Clark (Jun 11)
- RE: Cogent input Zak Thompson (Jun 11)
- Re: Cogent input Chuck Anderson (Jun 11)
- RE: Cogent input Paul Stewart (Jun 11)
- Re: Cogent input seph (Jun 11)
- Re: Cogent input Stephen Kratzer (Jun 11)
- Re: Cogent input manolo (Jun 11)
- Re: Cogent input Steve Bertrand (Jun 11)
- Re: Cogent input Bret Clark (Jun 11)
- Re: Cogent input Stephen Kratzer (Jun 11)
- Re: Cogent input Bret Clark (Jun 11)