What are people using for ear protection for datacenters these days? I'm
down to my last couple of corded 3M 1110:
http://www.shop3m.com/3m-corded-earplugs-hearing-conservation-1110.html
These work reasonably well in practice, with a rated nominal noise
reduction rate of 29dB. Some people find
On Wed, Sep 23, 2015 at 2:34 AM, Nick Hilliard wrote:
> What are people using for ear protection for datacenters these days?
Telecommuting, in my case.
had to say it! :0
> I'm
> down to my last couple of corded 3M 1110:
>
> http://www.shop3m.com/3m-corded-earplugs-hearing-conservation-1110.htm
> On Wed, Sep 23, 2015 at 2:34 AM, Nick Hilliard wrote:
> > What are people using for ear protection for datacenters these days?
>
> Telecommuting, in my case.
>
> had to say it! :0
I carry these around in my pocket all the time:
http://www.amazon.com/gp/product/B000W2CPCC
Not just for datace
I used molded 15dB earplug from ACS that I also use for other environments
(music, etc).
They are way much more comfortable (like, you forget them) but also more
expensive.
BTW I'm looking for a place to get new ones in Europe, if anyone has got
adresses.
Will van Gulik
On 23 Sep 2015, at 1
Why not just build a Datacenter that is quiet?
On Sep 23, 2015 05:34, Nick Hilliard wrote:
What are people using for ear protection for datacenters these days? I'm
down to my last couple of corded 3M 1110:
http://www.shop3m.com/3m-corded-earplugs-hearing-conservation-1110.html
These work reaso
Maybe I've always listened to my music to loud and spend the bulk of time
via ssh, but I've never felt a need for hearing protection in a DC, is this
generally an issue for people?
On Wed, Sep 23, 2015 at 8:08 AM, Alex Rubenstein wrote:
> Why not just build a Datacenter that is quiet?
>
> On Sep
> Why not just build a Datacenter that is quiet?
Because the cost differential to do so is a lot greater than the $10
to get some hearing protection?
Passive cooling typically translates to lower performance but also can
be more expensive.
... JG
--
Joe Greco - sol.net Network Services - Milwa
> Maybe I've always listened to my music to loud and spend the bulk of time
> via ssh, but I've never felt a need for hearing protection in a DC, is this
> generally an issue for people?
Depends on how long and how noisy.
As I've gotten older, I find loud noise in general is less tolerable,
so I'
On Wed, 23 Sep 2015 11:08:09 -, Alex Rubenstein said:
> Why not just build a Datacenter that is quiet?
When buying a compute cluster, if there's a budget choice between
15 more teraflops, or 15 less decibels, the teraflops *always* win.
pgpPEg0jomK8N.pgp
Description: PGP signature
On Wed, Sep 23, 2015 at 8:50 AM, wrote:
> When buying a compute cluster, if there's a budget choice between
> 15 more teraflops, or 15 less decibels, the teraflops *always* win.
>
Loudly sounds like a flop to me puns fully intended
--
Brian Christopher Raaen
Network Architect
Zcorum
I use these
http://www.amazon.com/V-MODA-Faders-Tuned-Earplugs-Electro/dp/B007RRTO2Y/ref=sr_1_9?ie=UTF8&qid=1443014097&sr=8-9&keywords=er+20+ear+plugs
in the equipment room, You can still hear, just brings the level down to a
manageable level. Looks like a pair of headphones.
On 9/23/15, 7:53 AM, "NANOG on behalf of Joe Greco"
wrote:
>> Maybe I've always listened to my music to loud and spend the bulk of
>>time
>> via ssh, but I've never felt a need for hearing protection in a DC, is
>>this
>> generally an issue for people?
>
>Depends on how long and how noisy.
>
>As
I use these normally. http://www.howardleight.com/earplugs/laser-lite
I am surprised some datacenters don't have a requirement for ear protection
when entering their facilitiy. Most large construction sites I have been to
required me to have ear plugs at least in a pocket and I have been to a fe
Since I’m in our colo facility this morning, I decided to put some numbers on
it in my little isolated corner with lots of blowers running.
According to my iPhone SPL meter, average SPL is 81 - 82 dB with peaks 88 - 89
dB.
According to the OSHA hearing protection chart, 90 dB is the maximum lev
On Wed, 2015-09-23 at 13:48 +, Bryan Holloway wrote:
> Depends on the type of "noise" too.
Obviously seek competent medical advice, but my understanding is that
this is a myth.
The energy of sound is what causes damage. Bach played at 120dB will do
just the same damage as a jet engine at 120d
I wear one of two things:
1) The 3M Peltor 105 ear muffs which offer 30db reduction.
I keep them in my car because I also use them for the gun
range, they fit snug but not annoying. They're only $18
on amazon: http://tinyurl.com/peltor105
There's also a behind the head bar if you don't like the o
I use Etymotic earplugs on my motorcycle as well as in other loud
environments, because they attenuate "without loss of clarity":
http://www.amazon.com/Etymotic-Research-ETY-Plugs-Protection-Earplugs/dp/B0044DEESS
--
Harald
Being a musician in a band, as well as very frequent concert goer, I use those
same ones. I like them the best for all around use. I have used many different
kinds, and I prefer these.
Thank you,
Jordan Medlen
Network Engineer
Bisk Education, Inc.
-Original Message-
From: NANOG [mailto
I use earphones for the phone and alerts function, and because they are
noise cancelling, they lower the db of noise. I use Shure SE215.
Eric Rogers
PDS Connect
www.pdsconnect.me
(317) 831-3000 x200
-Original Message-
From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Bryan Hollow
On Wed, Sep 23, 2015 at 1:34 AM, Nick Hilliard wrote:
> What are people using for ear protection for datacenters these days?
For me, it depends on the use case.
If I need to monitor for other sounds, or listen to music:
Bose QuietComfort 15 - discontinued, but still at Costco.com for $240.
The
I use the 3M E-A-R plugs at home and love them. Since my tragus doesn't fold
over, I am unable to use traditional Apple earbuds or other things that just
fall out of my ear. 3M E-A-R plugs are like memory foam and fit snugly,
providing excellent noise reduction. I use ComplyFoam on in-ear headph
Hi,
volume-based DDoS attacks should often result with following bandwidth graphs:
http://s12.postimg.org/gy3eps10t/volume_based_DDo_S_graph.png
This is a fabricated bps graph for 100GigE port facing an uplink
provider. As seen on the image, outgoing traffic drops at the time
when incoming traf
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Cisco IOS and IOS XE Software IPv6 First Hop Security Denial of Service
Vulnerabilities
Advisory ID: cisco-sa-20150923-fhs
Revision 1.0
For Public Release 2015 September 23 16:00 UTC (GMT
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Cisco IOS and IOS XE Software SSH Version 2 RSA-Based User Authentication
Bypass Vulnerability
Advisory ID: cisco-sa-20150923-sshpk
Revision 1.0
For Public Release 2015 September 23 16:00 UTC (GMT
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256
Cisco IOS XE Software Network Address Translation Denial of Service
Vulnerability
Advisory ID: cisco-sa-20150923-iosxe
Revision 1.0
For Public Release 2015 September 23 16:00 UTC (GMT
On 09/23/2015 10:09 AM, Keith Stokes wrote:
Since I’m in our colo facility this morning, I decided to put some numbers on
it in my little isolated corner with lots of blowers running.
According to my iPhone SPL meter, average SPL is 81 - 82 dB with peaks 88 - 89
dB.
With SPL that close to th
On 23 Sep 2015, at 23:07, Martin T wrote:
Are there any other reasons which cause outgoing traffic to drop if
incoming traffic is very high
Lots. It's very situationally-specific.
The attack traffic may not be crafted in such a way so as to elicit a
response from the targeted host(s).
Th
These block out the loud noise but allow you to still talk.
Surefire Sonic Defender EP3, Ep4, EP5, EP7
They all are great!
http://www.amazon.com/Surefire-Sonic-Defender-Plugs-1-Pair/dp/B007FKY8SI/ref=sr_1_8?ie=UTF8&qid=1443029640&sr=8-8&keywords=surefire+ep3+ep4
-Original Message-
Fro
The enterprise.com and enterprise.ca websites advertise records,
but the web servers don't respond to IPV6 HTTP requests. I have tried
to contacting Enterprise several times to correct, but I can't get thru
their layers of customer service. I'm hoping that somebody on NANOG
knows a technical
> On Sep 23, 2015, at 2:51 PM, Clinton Work wrote:
>
> The enterprise.com and enterprise.ca websites advertise records,
> but the web servers don't respond to IPV6 HTTP requests. I have tried
> to contacting Enterprise several times to correct, but I can't get thru
> their layers of custom
In article <1443034283.839054.391777385.56cd7...@webmail.messagingengine.com>
you write:
>The enterprise.com and enterprise.ca websites advertise records,
>but the web servers don't respond to IPV6 HTTP requests. I have tried
>to contacting Enterprise several times to correct, but I can't ge
On Wed, Sep 23, 2015 at 12:07 PM, Martin T wrote:
> volume-based DDoS attacks should often result with following bandwidth graphs:
>
> http://s12.postimg.org/gy3eps10t/volume_based_DDo_S_graph.png
>
> This is a fabricated bps graph for 100GigE port facing an uplink
> provider. As seen on the image
hi martin
On 09/23/15 at 07:07pm, Martin T wrote:
> volume-based DDoS attacks should often result with following bandwidth graphs:
>
> http://s12.postimg.org/gy3eps10t/volume_based_DDo_S_graph.png
>
>
> This is a fabricated bps graph for 100GigE port facing an uplink
when you say "fabricated"
Our IX's route servers run OpenBGPd 5.5. We are having a problem with a new
customer getting turned up. He's getting back invalid or corrupt AS Path
errors. There's a network on the IX that has a four byte ASN. They're running
IOS 12.4.(15)T and is asking me if we support RFC 4893 which appears
On 23/09/2015 21:37, Mike Hammett wrote:
> Do any of you have any useful input other than they need to upgrade
> their IOS to something newer than 4.5 years old?
12.4.(15)T is known to be affected by a variety of security problems, for
which cisco TAC will provide free upgrades - assuming they are
On Wed Sep 23, 2015 at 03:37:31PM -0500, Mike Hammett wrote:
> Do any of you have any useful input other than they need to upgrade their IOS
> to something newer than 4.5 years old?
I recently went through a very similar issue, and was convinced it was related
to 32 bit ASNs.
Are they seeing thi
They did, and it now formed peering with the RSD.
Thanks!
12.4.(24)T is the first version from that IOS train that natively
supports 4 byte ASN's.
We can upgrade at a more convenient time and date.
:-)
On 09/23/2015 05:04 PM, Simon Lockhart wrote:
On Wed Sep 23, 2015 at 03:37:31PM -0500, M
Fearing you might be on here, I tried to be fairly non-offensive in my post.
;-)
-
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
- Original Message -
From: "Richard Irving"
To: "Simon Lockhart" , "Mike Hammett"
Cc: "NANOG"
Sent: Wednesday, Septembe
FWIW, I have single digit NANOG shirts in my closet...
of course, I couldn't /*fit* into them/... anymore.
It has been almos_t_ 20 years.
Time flies eh ?
Seems like just yesterday Bill, John, I and /*Moses*/ were all having
lunch in Denver.
;-)
On 09/23/2015 05:20 PM, Mike Hammett
Hi all,
I work for a 2500 user university and we've seen some odd behavior
recently. 2-4 weeks ago we started seeing Google searches that would fail
for ~2 minutes, or disconnects in Gmail briefly. This week, and
particularly in the last 2-3 days, we've had reports from numerous users on
campus, e
Hi, Sean.
I had precisely this experience, mostly noticed just in the past day or so.
I assumed it was an effect of the firewall/NAT setup that my corporate IT
network has implemented, because it often is a culprit in these kind of
situations... But noticing that it was only for QUIC connections t
On Wednesday, September 23, 2015, Sean Hunter wrote:
> Hi all,
>
> I work for a 2500 user university and we've seen some odd behavior
> recently. 2-4 weeks ago we started seeing Google searches that would fail
> for ~2 minutes, or disconnects in Gmail briefly. This week, and
> particularly in the
On 24 Sep 2015, at 7:01, Sean Hunter wrote:
If anyone has any useful information or hints
I wonder if large-scale QoS and/or ACLing being done at some ISP edges
in response to UDP reflection/amplification attacks may be a factor?
It's not very smart of those working on QUIC to've thrown it
Hi all,
Is anyone else seeing high latency and huge packet loss at NTT's NYC
location?
Packets Pings
Host Loss% Snt Last Avg Best Wrst StDev
1. hosted-by.reliablesite.net 0.0%920.7 1.5 0.7 6.6 1.7
2. 108.61.244.105 0.0%910.2 0.2 0.2 0.4
Call for Participation in IEEE ICNP 2015
Early Registration Deadline: September 25
Student Travel Grant Deadline: September 25
http://icnp15.cs.ucr.edu/
San Francisco, CA, USA
Novembe
Do you happen to have a copy of the path going in the other direction?
Based on this it seems that the issue starts after this leaves NTT.
/Charles
On Wed, Sep 23, 2015 at 9:01 PM, Paras wrote:
> Hi all,
>
> Is anyone else seeing high latency and huge packet loss at NTT's NYC
> location?
>
> Pac
So I intended to provide a few short comments on this but got on a
roll. The below may be of more or less use to you but this is the way
I look at things.
Listening to music isn't all that bad a means of dealing with noise
for shorter periods such as the odd onsite engineers have to do
because eit
If you go the "molded to my ear" route, do not forget that your ears
will tend to change over time and these must be replaced periodically
or they'll become uncomfortable and less effective. (I forget what the
recommendation is but I think every 1-2 years at the outside.)
On Wed, Sep 23, 2015 at 1
> What are people using for ear protection for datacenters these days?
> I'm down to my last couple of corded 3M 1110:
http://www.moldex.com/hearing-protection/foam-earplugs/pura-fit.php
This are cheap, but that's sort of the point - you can put a bin, or several
bins, filled with them on the
Seconded. I wear my Shure 425s with foam plugs most of my waking hours,
they are excellent at blocking outside noise and sound pretty good to boot.
On 9/23/2015 11:02 AM, Eric Rogers wrote:
I use earphones for the phone and alerts function, and because they are
noise cancelling, they lower t
I've always worked in enterprise only so I thought you guys might be able
to help me with this one.
We are dual homed to Verizon and AT&T. We prepend all our prefixes out
AT&T to make them least preferred. During a recent issue we found some
users were coming in via AT&T. Using various looking g
It depends on what type of L2VPN we are talking about.
If we are talking about VPLS (where we learn from the data path) changes
are needed in order to make it work with segment routing. Basically, the
VC label must be assigned and used in such a way that it indicates not only
the service for the
> On Sep 23, 2015, at 5:38 PM, Jason Bullen wrote:
>
> I've always worked in enterprise only so I thought you guys might be able
> to help me with this one.
> We are dual homed to Verizon and AT&T. We prepend all our prefixes out
> AT&T to make them least preferred. During a recent issue we fo
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