Re: Outside plant - prewire customer demarc preference

On Wed, Dec 6, 2023 at 3:45 AM Sean Donelan wrote: > U.S. NEC does not require any mechanical protection for fiber cables. You > can run "bare" fiber cables through most residential spaces (with a few > exceptions for jacket material, i.e. direct burial cable not allowed > inside habital

Re: Outside plant - prewire customer demarc preference

On Fri, Dec 1, 2023 at 1:56 AM owen--- via NANOG wrote: > However, apparently ENT was a predecessor to that, I just hadn’t encountered > it until now. I don’t recall even seeing it in the aisles at local HDs. I’ll > have to look for it. Apparently I spend more time roaming the aisles of the

Re: Advantages and disadvantages of legacy assets

On Wed, Nov 22, 2023 at 8:14 PM William Herrin wrote: > It still seems unwise, but not entirely insane. I would expect that at some point in the future that many/all of the major players will require RIR validated routing information, and whether that is due to regulation or best practices for

Re: Article: DoD, DoJ press FCC for industry-wide BGP security standard

On Tue, Sep 20, 2022 at 5:40 PM Randy Bush wrote: > to remind, ROV is a safety mechanism, not a security mechanism. it is > proving, as intended, to mitigate mistakes. which is very cool. but it > does not mitigate attacks of any sophistication. Mitigating against mistakes has value, and in

Re: questions about ARIN ipv6 allocation

On Mon, Dec 6, 2021 at 5:59 PM Owen DeLong wrote: > The situation is such that the current economic incentives would be most > advantageous to me to preserve my LRSA and abandon my RSA, which would > involve simply turning off IPv6. While the details are certainly yours to keep private, from

Re: questions about ARIN ipv6 allocation

On Sun, Dec 5, 2021 at 2:23 PM Owen DeLong via NANOG wrote: > The double billing (had it been present at the time) would have prevented me > from signing the LRSA for my IPv4 resources. There were some community participants that suggested that having a formal relationship with the ARIN

Re: IPv6 and CDN's

On Sat, Nov 27, 2021 at 5:05 PM Oliver O'Boyle wrote: > On Sat., Nov. 27, 2021, 10:46 Scott Morizot, wrote: >> Since we are deploying BYO IPv6 in AWS, I can assure you they do offer it >> now. That was a blocker for us. > Wonderful! When did they start offering that? I believe it was

Re: DoD IP Space

On Mon, Feb 15, 2021 at 9:36 PM Joe Loiacono wrote: > V8! heh ... wow hadn't thought of that for a while ... ... Slaps forehead and says: "Wow, I could've had a V8!"

Re: Waste will kill ipv6 too

On Sat, Dec 30, 2017 at 2:31 AM, Michael Crapse wrote: > And if a medical breakthrough happens within the next 30 years? Nanobots > that process insulin for the diabetic, or take care of cancer, or repair > your cells so you don't age, or whatever, perhaps the inventor things

Re: phone fun, was GeoIP database issues and the real world consequences

On Thu, Apr 14, 2016 at 3:32 PM, Leo Bicknell wrote: . > So maybe 10% of all cell phones are primarly used in the "wrong" area? Obligatory xkcd ref: https://xkcd.com/1129/

Re: small automatic transfer switches

On Wed, Jan 27, 2016 at 9:16 PM, William Herrin wrote: > On Wed, Jan 27, 2016 at 3:29 PM, Chuck Anderson wrote: >> Does anyone have any recommendations for a small, cheap, reliable ATS? > > The APC SU042 series sell for dirt on ebay. Or the SU041 if you have some

Re: Updated Ookla Speedtest Server Requirements

On Mon, Nov 9, 2015 at 9:38 PM, Dave Taht wrote: > I dearly would like them to update the software to not require flash. Last I knew ookla still required flash, and one should just say no to flash. Dslreports (and other speed tests) work with modern browser

Re: ARIN just subdivided their last /17, /18, /19, /20, /21 and /22. Down to only /23s and /24s now. : ipv6

On Mon, Jun 29, 2015 at 4:07 PM, Bob Evans b...@fiberinternetcenter.com wrote: It would not surprise me to find ARCnet (Datapoint's) still running in some corner somewhere. Possibly next to the system running Banyan VINES.

Re: Residential VSAT experiences?

On Fri, Jun 26, 2015 at 5:25 PM, William Herrin b...@herrin.us wrote: If you want to nitpick. ;) Well, if you are going to nitpick, the earth is modeled more closely (but still not precisely) as an oblate spheroid than a true sphere.

Re: certification (was: eBay is looking for network heavies...)

On Mon, Jun 8, 2015 at 4:31 AM, Tony Hain alh-i...@tndh.net wrote: Randy Bush wrote: but you can't move packets on pieces of paper. Or can you? RFC's 6214 2549 1149 But how many avian carriers would you need to move the packets current pushed around per second, and how many Mercedes'

Re: Verizon Policy Statement on Net Neutrality

On Sun, Mar 1, 2015 at 12:14 AM, Michael Thomas m...@mtcc.com wrote: If they wanted to shape DOCSIS to have better upstream, all they had to say is JUMP to cablelabs and the vendors and it would have happened. Like DOCSIS 3.1? If I recall correctly, theoretical upstream up to 2.5gb/s.

Re: Now that's an odd failure mode...

On Fri, Jan 30, 2015 at 10:31 PM, Larry Sheldon larryshel...@cox.net wrote: . HOW did they make it Maybe the woodpecker had a little help... Obligatory Friday xkcd ref: http://xkcd.com/614/

Re: Got a call at 4am - RAID Gurus Please Read

On Thu, Dec 11, 2014 at 2:25 AM, Randy Bush ra...@psg.com wrote: We are now using ZFS RAIDZ and the question I ask myself is, why wasn't I using ZFS years ago? because it is not production on linux, Well, it depends on what you mean by production. Certainly the ZFS on Linux group has said in

Re: Shipping bulk hardware via freight

On Thu, Nov 6, 2014 at 6:07 PM, valdis.kletni...@vt.edu wrote: On Wed, 05 Nov 2014 23:11:23 -0500, William Herrin said: Ah yes, I recall watching them decommission the old Control Data Cyber 990 back at Georgia Tech. The mover slipped trying to get it on the liftgate and the whole cabinet

Re: Linux: concerns over systemd [OT]

On Wed, Oct 22, 2014 at 9:17 PM, Jeffrey Ollie j...@ocjtech.us wrote: I think that Debian's plan to allow multiple init systems (irregardless of which one is default) is a bad plan. The non-default ones won't get any love - at some point they'll just stop working (or indeed, work at

Re: IPv6 Default Allocation - What size allocation are you giving out

On Thu, Oct 9, 2014 at 1:18 AM, Erik Sundberg esundb...@nitelusa.com wrote: I am planning out our IPv6 deployment right now and I am trying to figure out our default allocation for customer LAN blocks. So what is everyone giving for a default LAN allocation for IPv6 Customers. I guess the

Re: IPv6 Default Allocation - What size allocation are you giving out

On Thu, Oct 9, 2014 at 4:45 AM, Faisal Imtiaz fai...@snappytelecom.net wrote: So, this is more of a 'opinion' / 'feel' (with all due respect) comment, and not something which has a (presently) compelling technical reasoning behind it ? Think of something like HIPnet

Re: IPv6 Default Allocation - What size allocation are you giving out

On Thu, Oct 9, 2014 at 5:16 AM, jamie rishaw j...@arpa.com wrote: (PS If I wake up in the morning and find out that someone has hacked my CatGenie litter boxes, I will hunt you down). I am sure any hacking will result in taking a dump.

Re: IPv6 Default Allocation - What size allocation are you giving out

On Thu, Oct 9, 2014 at 5:09 AM, jamie rishaw j...@arpa.com wrote: . These arguments and debates make me sad. I suppose it's my own fault for assuming that everyone in this ML is a forward thinker. Get used to disappointment.

Re: Owning a name

On Thu, Jul 31, 2014 at 12:10 AM, Owen DeLong o...@delong.com wrote: Wonder how long it is before we recognize the need for an international technical court for such matters where the guy on the bench has to be not just a lawyer, but a nerd, too. Can I nominate Judge William Alsup?

Re: Carrier Grade NAT

On Wed, Jul 30, 2014 at 5:22 AM, Owen DeLong o...@delong.com wrote: On Jul 29, 2014, at 4:13 PM, Mark Andrews ma...@isc.org wrote: . Add to that over half your traffic will switch to IPv6 as long as the customer has a IPv6 capable CPE. That's a lot less logging you need to do from day 1.

Re: Muni Fiber and Politics

On Mon, Jul 21, 2014 at 8:34 PM, Owen DeLong o...@delong.com wrote: . Whoever installs fiber first and gets any significant fraction of subscribers in any but the densest of population centers is a competition killer, _IF_ you let them parlay that physical infrastructure into an

Re: Muni Fiber and Politics

On Mon, Jul 21, 2014 at 9:37 PM, Jay Ashworth j...@baylink.com wrote: No, but I wasn't asserting All government sucks. Ugh; you were. All governments suck some of the time, and some governments suck all of the time. Your evaluation as to the level of vacuum will depend on how often your

Re: Muni Fiber and Politics

On Mon, Jul 21, 2014 at 10:13 PM, Jay Ashworth j...@baylink.com wrote: Cause my mailer isn't RFC 2919 compliant. Sorry. Zimbra has had open follow the damn RFC's tickets out there for a number of years. Perhaps it is past time to migrate away (fool me once, shame on you, fool me twice,

Re: Net Neutrality...

On Fri, Jul 18, 2014 at 6:49 PM, Paul S. cont...@winterei.se wrote: For all intents and purposes, it actually does work fine -- yeah. I've got a few friends who bought it, it seems to work fine. This is way off topic, but This topic was covered back in the beginning of the year at:

Re: Ars Technica on IPv4 exhaustion

On Thu, Jun 19, 2014 at 10:47 PM, Owen DeLong o...@delong.com wrote: . Ideally, it would be nice if the UNH/IOL and/or CEA could come up with a meaningful definition of IPv6 support and a logo to go with it that we could tell consumers to look for on the box. Ideally, this would be a set

Re: Credit to Digital Ocean for ipv6 offering

On Wed, Jun 18, 2014 at 11:37 PM, Daniel Ankers md1...@md1clv.com wrote: On 18 June 2014 19:05, Owen DeLong o...@delong.com wrote: OTOH, it's far better than those ridiculous providers that are screwing over their customers with /56s or even worse, /60s. Sad, really. Owen Is giving a

Re: US patent 5473599

On Wed, May 7, 2014 at 5:18 PM, Rob Seastrom r...@seastrom.com wrote: Eygene Ryabinkin rea+na...@grid.kiae.ru writes: If you hadn't seen the cases when same VRIDs in the same network were used for both VRRP and CARP doesn't mean that they aren't occurring in the real world. We use CARP and

Re: Residential CPE suggestions

On Mon, May 5, 2014 at 11:59 PM, Deepak Jain dee...@ai.net wrote: Any recommendation for a residential CPE that supports dual SFP uplinks (WAN) with either a routing protocol or a resilient Ethernet solution? Ideally, LAN port should be 100/1000 CAT5. I've looking at Mikrotik, Draytek and

Re: Requirements for IPv6 Firewalls

On Sat, Apr 19, 2014 at 2:29 PM, joel jaeggli joe...@bogus.com wrote: On 4/18/14, 7:04 PM, Jeff Kell wrote: PCI requirement 1.3.8 pretty much requires RFC1918 addressing of the computers in scope... It does not You are correct. In theory. However, for those organizations that have chosen

Re: Requirements for IPv6 Firewalls

On Fri, Apr 18, 2014 at 3:02 PM, William Herrin b...@herrin.us wrote: The main drivers behind the desire for NAT in IPv6 you've heard before, but I'll repeat them for the sake of clarity: 5. Some industries (PCI compliance) *require* NAT as part of the audit-able requirements. Yes,

Re: A little silly for IPv6

On Wed, Mar 26, 2014 at 12:55 PM, rw...@ropeguru.com rw...@ropeguru.com wrote: . I want to see HIS source of hpow many atoms are actually on the earth. Somehow, I do not think anyone knows that answer. So his comparision is a joke. Obligatory xkcd ref: https://xkcd.com/865/

Re: Level 3 blames Internet slowdowns on Technica

On Tue, Mar 25, 2014 at 3:56 AM, Naslund, Steve snasl...@medline.com wrote: You are right but that is usually how it works with fiber because that last drop to the home is a pretty expensive piece that you don't usually want installed until it is needed. The LECS usually don't even light a

Re: L6-20P - L6-30R

On Thu, Mar 20, 2014 at 4:00 PM, Rob Seastrom r...@seastrom.com wrote: Lamar Owen lo...@pari.edu writes: Actually, there is no NEC 384.16 any more, at least in the 2011 code. Guilty. I reflexively reached for my 2008 copy since that's the code of record here where I live. Glad we're not

Re: NetSol opts domain customers into $1800 Security program?

On Wed, Jan 22, 2014 at 7:20 PM, Barry Shein b...@world.std.com wrote: P.S. Doing that, removing auto-renew, changes you to receiving urgent email from them once a week or so starting 90 days in advance about how your domain is ABOUT TO EXPIRE! Sort of reminds me of the late night TV ads

Re: turning on comcast v6

On Fri, Jan 3, 2014 at 4:09 PM, Leo Bicknell bickn...@ufp.org wrote: Rogue RA's can take down statically IPv6'ed boxes. Rogue DHCP servers will never affect a statically configured IPv4 box. I believe that that would depend on whether your configuration of a static IPv6 address on your

Re: turning on comcast v6

On Fri, Dec 20, 2013 at 5:42 AM, Christopher Morrow morrowc.li...@gmail.com wrote: On Fri, Dec 20, 2013 at 12:30 AM, Owen DeLong o...@delong.com wrote: I'd like to encourage people to use prefix-hint=::/48. ... I think if I ask (via wide-dhcpv6-server) for more than is going to be sent I

Re: Caps (was Re: ATT UVERSE Native IPv6, a HOWTO)

On Mon, Dec 9, 2013 at 6:02 AM, Jeff Kell jeff-k...@utc.edu wrote: ... With 3270 you have little choice other than full screen transactions. It has been a long long time, but for the truly crazy, I thought it was possible to write single characters at a time (using a Set Buffer Address and then

Re: ATT UVERSE Native IPv6, a HOWTO

On Mon, Dec 2, 2013 at 11:47 PM, Owen DeLong o...@delong.com wrote: (Hint, NEST has already released an IPv4 smoke detector). And they really should have enabled IPv6 on it :-( But the processor should be able to handle it, if they update the firmware. I hear Tado does IPv6.

Re: ATT UVERSE Native IPv6, a HOWTO

On Thu, Nov 28, 2013 at 9:07 PM, Leo Vegoda leo.veg...@icann.org wrote: Is a /60 what is considered generous these days? I do not think so. I think that is more minimal than generous. I thought a /48 was considered normal and a /56 was considered a bit tight. What prefix lengths are

Re: OT: Below grade fiber interconnect points

On Fri, Nov 15, 2013 at 9:25 PM, Jay Ashworth j...@baylink.com wrote: ... Yeah; cranes are a bitch. :-) No, it is arranging for a rigging crew and the safety plan reviews for the lift (at least in any major company/institution which wants to stay on the happy side of OSHA; and has consul that

Re: latest Snowden docs show NSA intercepts all Google and Yahoo DC-to-DC traffic

On Fri, Nov 1, 2013 at 4:43 AM, Anthony Junk anthonyrj...@gmail.com wrote: ... It seems as if both Yahoo and Google assumed that since they were private circuits that they didn't have to encrypt. I actually cannot see them assuming that. Google and Yahoo engineers are smart, and taping fibres

Re: Urgent: rack mounting kit / rack shelf

On Fri, Jul 5, 2013 at 8:16 PM, Mike Lyon mike.l...@gmail.com wrote: Frys on Kifer Fry's is actually on Arques Ave in Sunnyvale. Not sure about all the Fry's, but the Sunnyvale store has re-imagined itself (no longer has rows upon rows of 8' shelves, they are now all about 5' tall, so you get a

Re: Security over SONET/SDH

On Mon, Jun 24, 2013 at 9:37 PM, Jamie Bowden ja...@photon.com wrote: Actually, you CAN do that, but you have to apply for ITAR exceptions. EXIM is complex and you really want a good legal team who are familiar with it hand holding you through it (and on extended retainer going

Re: why haven't ethernet connectors changed?

On Thu, Dec 20, 2012 at 10:20 AM, Michael Thomas m...@mtcc.com wrote: So why, oh why, nanog the omniscient do we still use rj45's? Because 8P8C connectors are well understood (both physically, and electrically)? And inertia matters. On some newer kit, Apple has removed the Ethernet port

Re: Whats so difficult about ISSU

On Sun, Nov 11, 2012 at 1:45 AM, Saku Ytti s...@ytti.fi wrote: ... Or is GPL not really problematic issue, as you can hide your intellectual property in binary kernel modules? GPLv2, which governs the Linux Kernel, does tolorate use of binary kernel modules under some conditions (the classic

Re: Whats so difficult about ISSU

On Sun, Nov 11, 2012 at 7:31 AM, Felipe Zanchet Grazziotin fel...@starbyte.net wrote: ... If your silicon vendor supports BSD's, of course. From my (little) experience most vendors SDK will be available to Linux and vxWorks but not BSD. This limits companies that are building equipments based

Re: RPKI Pilot Participant Notice

On Wed, Sep 5, 2012 at 7:24 PM, Christopher Morrow morrowc.li...@gmail.com wrote: . a closer (by me) reading of: In order to access the production RPKI TAL, you will first have to agree to ARIN's Relying Party Agreement before the TAL will be emailed to you. To request the TAL after the

Re: DNS caches that support partitioning ?

Re: LRU badness One approach is called adaptive replacement cache (ARC) which is used by Oracle/Sun in ZFS, and was used in PostgreSQL for a time (and slightly modified to (as I recall) to be more like 2Q due to concerns over the IBM patent on the algorithm). Unfortunately, we do not have any

Re: US House to ITU: Hands off the Internet

On Fri, Aug 3, 2012 at 6:06 PM, Patrick W. Gilmore patr...@ianai.net wrote: Unanimous? I didn't think this congress could agree the earth is round unanimously. Perhaps because the earth is usually more properly described as an oblate spheroid... Gary

Re: EBAY and AMAZON

On Tue, Jun 12, 2012 at 4:33 PM, Michael R. Wayne wa...@staff.msen.com wrote: ... It is important to understand that there is nothing inherent in the Windows experience which prohibits security. Rather, it is a deliberate design choice on the part of MS. Windows. A strange game. The only

Re: CVV numbers

On Sun, Jun 10, 2012 at 8:02 AM, Owen DeLong o...@delong.com wrote: The skimmers can use CVV1 and bypass the CVV2 protection in most cases (though that requires them to gen up a fake or fraudulent card and do card present transactions which does add risk for them). Not so much for them,

Re: WW: Colo Vending Machine

On Wed, Feb 22, 2012 at 08:09, Joel jaeggli joe...@bogus.com wrote: ... If we just stop printing things the problem goes away. I think Xerox promised me a paperless office (starting in the 1980s?). I am still waiting.

Re: Common operational misconceptions

On Fri, Feb 17, 2012 at 06:52, -Hammer- bhmc...@gmail.com wrote: Let me simplify that. If you are over 35 you know how to troubleshoot. Yes, I'm going to get flamed. Yes, there are exceptions in both directions. Necessity is the mother of invention Long before there was a Grainger (and Home

Re: common time-management mistake: rack stack

On Thu, Feb 16, 2012 at 23:29, Jeff Wheeler j...@inconcepts.biz wrote: ... Imagine if the CFO of a bank spent a big chunk of his time filling up ATMs. Flying a sharp router jockey around to far-flung POPs to install gear is just as foolish. There is a theory of management that says a good

Re: Common operational misconceptions

On Fri, Feb 17, 2012 at 18:06, George Bonser gbon...@seven.com wrote: Fry's wanted $55 for a 1 meter LC-LC multi-mode patch cord yesterday at the store on Arques in Sunnyvale. Admittedly high, but in the same store, one set of rows to the left (as you were looking at the fibres) they sell

Re: Colo Vending Machine

On Sat, Feb 18, 2012 at 01:02, George Herbert george.herb...@gmail.com wrote: Will IANA accept netblock transfers as an exchange medium for datacenter goodies vending machine payments? ...  ;-) Joking while busy discouraged.  s/IANA/ARIN/d'oh I suspect ARIN would follow its policy to

Re: LX sfp minimum range

On Thu, Jan 26, 2012 at 13:47, David Storandt dstora...@teljet.com wrote: You can put a 3dB or 5dB optical pad on the link if the receiver can't handle zero-distance optical power. As I recall, the problem may not only be the power (which can cause receiver saturation), but issue that fibre

Re: AD and enforced password policies

On Tue, Jan 3, 2012 at 05:09, Greg Ihnen os10ru...@gmail.com wrote: A side issue is the people who use the same password at fuzzykittens.com as they do at bankofamerica.com. Of course fuzzykittens doesn't need high security for their password management and storage. After all, what's

Re: AD and enforced password policies

On Mon, Jan 2, 2012 at 22:32, Jimmy Hess mysi...@gmail.com wrote: The sole root cause for easily guessable passwords is not lack of technical restrictions. It's also: lazy or limited memory humans who need passwords that they can remember. Firstname1234!    is very easy to guess, and

Re: IP addresses are now assets

On Sat, Dec 3, 2011 at 18:18, David Barak thegame...@yahoo.com wrote: Should the HAC be expected to manage the transition to HumorV6? I am not that familiar with Humorv6. Has Hv6 had sufficient operational input, or is it based on a philosophically pure redesign of humor making it

Re: IP addresses are now assets

On Fri, Dec 2, 2011 at 20:01, bmann...@vacation.karoshi.com wrote: . Suggestion received and needing confirmation: That ARIN or a party it designates assign one or more sense(s) of humour to the CEO. I

Re: IP addresses are now assets

On Fri, Dec 2, 2011 at 03:52, Robert E. Seastrom r...@seastrom.com wrote: In any litigation, Counsel always wins.  I often remind myself that there's still time to go to law school.  :-) It may be too late. The glory days of getting a JD and then racking in the money are apparently over.

Re: Dynamic (changing) IPv6 prefix delegation

On Mon, Nov 21, 2011 at 22:18, Nathan Eisenberg nat...@atlasnetworks.us wrote: Look at the number that are refusing to make generous prefix allocations to residential end users and limiting them to /56, /60, or even worse, /64. Owen, What does Joe Sixpack do at home with a /48 that he

Re: Internet mauled by bears

On Tue, Sep 20, 2011 at 01:49, Richard Barnes richard.bar...@gmail.com wrote: And if they turn up the voltage on the fence high enough, dinner could be cooked by the time the crew gets there! Not quite. The point of the electric fence is to discourage moooving through it, but you do not want

Re: East Coast Earthquake 8-23-2011

On Wed, Aug 24, 2011 at 05:55, JC Dill jcdill.li...@gmail.com wrote: On 23/08/11 3:13 PM, William Herrin wrote: A. Our structures aren't built to seismic zone standards. Our construction workers aren't familiar with*how*  to build to seismic zone standards. We don't secure equipment inside

Re: What do you do when your Home ISP is down?

On Thu, Aug 18, 2011 at 18:09, Eric Wieling ewiel...@nyigc.com wrote: Obligatory xkcd http://xkcd.com/806/ Obligatory dilbert: http://www.youtube.com/watch?v=gc2Ks3lQew8 (the first part regarding tech support)

Re: Microsoft's participation in World IPv6 day

On Thu, Jun 2, 2011 at 21:42, Cameron Byrne cb.li...@gmail.com wrote: Pure speculation here, but these stats that you refer to are not a scientifically representative sample of the internet at large, this sample is a self selecting group of people who have chosen to run an ipv6 test.

Re: IPv6: numbering of point-to-point-links

On Mon, Jan 31, 2011 at 09:13, Blake Hudson bl...@ispn.net wrote: I setup a p2p /127 link and found that BGP would not peer over the link; Changing to /126 resolved the problem. I never looked into it further because I had intended to use /126 from the start. My guess is that while BGP

Re: anyone running GPS clocks in Southeastern Georgia?

NTP isn't going to be the only ripple. Most of the brand name GPS NTP solutions have a clock with is more than stable enough to survive without GPS lock for 45 minutes(*). Some of the more expensive units with temperature controlled oscillators have hold times in the many weeks. My guess is

Re: Want to move to all 208V for server racks

On Fri, Dec 3, 2010 at 22:28, Owen DeLong o...@delong.com wrote: ... This is easily done with AC and would be quite complex and inefficient (especially with the technology available at the time this decision was made) with DC. Correct. Now, of course, with switched mode conversion and power

Re: Want to move to all 208V for server racks

48V (and some more when batteries are full) are slightly below the limit of non harmfull voltage. I suspect you have never seen the pictures of a wrench that exploded/splattered all over someones body. 50V may not (usually, but your mileage will vary) be able to produce enough current in a body

Re: Want to move to all 208V for server racks

On Thu, Dec 2, 2010 at 22:39, Seth Mattinen se...@rollernet.us wrote: ... Arc fault breakers are a very new code requirement which I believe is primarily targeted at sleeping areas. My place has them (built about 4 years ago) on the bedroom outlet circuits. If I spin the socket switch on one

Re: Want to move to all 208V for server racks

On Fri, Dec 3, 2010 at 07:54, Chuck Anderson c...@wpi.edu wrote: On another note, how do you calculate N+1 power feeds in your racks? If you have 2 PDUs fed from two different branch circuits/UPSes/etc. do you just set your PDU load alarm thresholds at 50% of the max rating of each PDU

Re: Want to move to all 208V for server racks

On Fri, Dec 3, 2010 at 04:02, John van Oppen jvanop...@spectrumnet.us wrote: ... GFCI breakers are often required on large services, most large (new) 480v services I have seen (1000A and larger) a have Ground fault breakers, Actually, my recollection is that large new services include arc

Re: Want to move to all 208V for server racks

btw, one thing I do not recall seeing on this thread is that 208v avoids one of the common problems with 120v, which is the third harmonic issue. With the cheaper switching power supplies, one will often see significant 3rd harmonics in the waveforms(*). The 3rd harmonic, across a 3 phase

Re: Want to move to all 208V for server racks

On Thu, Dec 2, 2010 at 22:07, Ricky Beam jfb...@gmail.com wrote: ... I think they are now a violation of the NEC.  And they were delisted by UL years ago.  They pose a hazard as they will not react fast enough to prevent a fatal shock. (and the only one's I've ever seen were outlawed as the

Re: Want to move to all 208V for server racks

On Thu, Dec 2, 2010 at 22:17, Antonio Querubin t...@lava.net wrote: ... You sure about that?  GFCI breakers as well as their close cousins AFCIs are still being sold and bought at hardware stores. I am not sure I would call AFCIs a close cousin to the GFCI (except that they are both more

Re: Did your BGP crash today?

On Mon, Aug 30, 2010 at 15:55, Jack Bates jba...@brightok.net wrote: ... As good a place to break in on the thread as any, I guess. Randy and others believe more testing should have been done. I'm not completely sure they didn't test against XR. They very likely could have tested in a 1 on 1

Re: DNSSEC and SSL

On Sat, Aug 21, 2010 at 18:00, ML m...@kenweb.org wrote: Would a future with a ubiquitous DNSSEC deployment eliminate the market for commercial CAs? Would functioning DNSSEC + self signed certs be more secure/trustworthy than our current system of trusted CAs chosen by OS/browser developers?