Re: Common operational misconceptions

2012-03-03 Thread Michael Sinatra
On 03/03/12 00:33, Mukom Akong T. wrote: On Thu, Feb 16, 2012 at 4:46 AM, Michael Sinatra wrote: ULA is the IPv6 equivalent of RFC1918 Michael, could you explain this a bit more? In the sense that : a. Anyone can use ULA pretty much as they wish without having to go to their ISP or RIR - sa

Re: Common operational misconceptions

2012-03-03 Thread Mukom Akong T.
On Thu, Feb 16, 2012 at 4:46 AM, Michael Sinatra wrote: > ULA is the IPv6 equivalent of RFC1918 Michael, could you explain this a bit more? In the sense that : a. Anyone can use ULA pretty much as they wish without having to go to their ISP or RIR - same for RFC1918 b. In order to get to the pub

Re: Common operational misconceptions

2012-02-26 Thread Jon Lewis
Blocking incoming spam is worth spending $ on for software, 3rd party filtering services, or dedicated spam filtering hardare. Blocking outgoing spam? Huh? -- Jon Lewis, MCP :) | I route Senior Network Engineer

Re: Common operational misconceptions

2012-02-21 Thread Jay Ashworth
- Original Message - > From: "Jimmy Hess" > RJ45 is really an example of what was originally a misconception > became so widespread, so universal, that reality has actually shifted > so the misconception became reality. When was the last time you ever > heard anyone say "8P8C connector?"

Re: Common operational misconceptions

2012-02-21 Thread nanog
#x27;d put on a top 10 list, but I'd like to solicit from this community what it considers to be the most annoying and common operational misconceptions future operators often come at you with. I'd prefer replies off-list and can summarize back to the list if there is interest. John H

Re: Common operational misconceptions

2012-02-21 Thread Robert Bonomi
Lamar Owen wrote: > > On Monday, February 20, 2012 09:07:20 PM Jimmy Hess wrote: > > RJ45 is really an example of what was originally a misconception > > became so widespread, so universal, that reality has actually shifted > > so the misconception became reality. When was the last time you eve

Re: Common operational misconceptions

2012-02-21 Thread Lamar Owen
On Monday, February 20, 2012 09:07:20 PM Jimmy Hess wrote: > RJ45 is really an example of what was originally a misconception > became so widespread, so universal, that reality has actually shifted > so the misconception became reality. When was the last time you ever > heard anyone say "8P8C con

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
Steven Bellovin wrote: >> I'm not sure what, do you think, is the problem, because the >> paragraph of RFC2923 you quote has nothing to do with TCP >> MSS. > > Sure it does. That's in 2.1; the start of it discusses PMTUD > failing for various reasons including firewalls. Firewalls? Though I ha

Re: Common operational misconceptions

2012-02-20 Thread Steven Bellovin
On Feb 20, 2012, at 10:27 PM, Masataka Ohta wrote: > Steven Bellovin wrote: > >>> Timer timeouts do not affect TCP MSS. > >> RFC 2923: >> TCP should notice that the connection is timing out. After >> several timeouts, TCP should attempt to send smaller packets, >> perhaps tur

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
George Bonser wrote: > I, in fact, HAVE read the RFC. You don't, at all. > The initial value for search_high SHOULD be the largest possible > packet that might be supported by the flow. This may be limited by > the local interface MTU, by an explicit protocol mechanism such as >

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
Steven Bellovin wrote: >> Timer timeouts do not affect TCP MSS. > RFC 2923: >TCP should notice that the connection is timing out. After >several timeouts, TCP should attempt to send smaller packets, >perhaps turning off the DF flag for each packet. If this >succe

RE: Common operational misconceptions

2012-02-20 Thread George Bonser
1400 and stay there. > -Original Message- > From: Masataka Ohta [mailto:mo...@necom830.hpcl.titech.ac.jp] > Sent: Monday, February 20, 2012 6:43 PM > To: George Bonser > Cc: nanog@nanog.org > Subject: Re: Common operational misconceptions > > George Bonser wrote:

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
George Bonser wrote: >> First, it sets eff_pmtu to 1400B. OK? > > Where did you get 1400 from? Read the RFC. PERIOD. Masataka Ohta

RE: Common operational misconceptions

2012-02-20 Thread George Bonser
> -Original Message- > From: Masataka Ohta > First, it sets eff_pmtu to 1400B. OK? Where did you get 1400 from? Are you talking specifically with the linux implementation? "As eff_pmtu of 1400B is close enough to search_high, you are done." I suppose that depends on a specific impl

Re: Common operational misconceptions

2012-02-20 Thread Jimmy Hess
On Sat, Feb 18, 2012 at 1:19 AM, Bob Vaughan wrote: > "Ethernet/Token Ring/Cisco Console/whatever uses an RJ45 connector" >  RJ45 defines a keyed 8P8C type connector, wired in a specific >  manner, for a specific 2 wire telco service. Incompatible with the >  above on several levels.  "RJxx" == sp

Re: Common operational misconceptions

2012-02-20 Thread Steven Bellovin
> > >> The timer for Linux is 5 minute by default but you can change it. > > Timer timeouts do not affect TCP MSS. > RFC 2923: TCP should notice that the connection is timing out. After several timeouts, TCP should attempt to send smaller packets, perhaps turning off the DF

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
George Bonser wrote: > I am saying that MTU probing works just fine, even with a > link in between that has a shorter MTU and doesn't pass > ICMP. And I have been saying your statement is unfounded. > I actually have one of those. I can't see any. > It actively probes with packets of varying s

RE: Common operational misconceptions

2012-02-20 Thread George Bonser
> > Your trick is that your routers at the border between MTUs > 7500 and 1500 (or maybe, 1400 or so) generate ICMP packet too big > packets to your servers and no intermediate entities filter them, isn't > it? > > Masataka Ohta I am saying that MTU

Re: Common operational misconceptions

2012-02-20 Thread Masataka Ohta
George Bonser wrote: > Must be magic then, because it works for me. Yes, but magicians always use tricks. > I've got a few dozen servers with MTU 7500 that aren't > having a bit of trouble talking to anyone. Your trick is that your routers at the border between MTUs 7500 and 1500 (or maybe, 140

RE: Common operational misconceptions

2012-02-20 Thread George Bonser
> George Bonser wrote: > > >> It is seemingly working well means there is not much PMTU changes, > >> which means we had better assumes some PMTU (1280B, for example) and > >> use it without PMTUD. > > > It depends on the OS and the method being used. If you set the > option > > to "2" on Linux,

Re: Common operational misconceptions

2012-02-20 Thread Valdis . Kletnieks
On Mon, 20 Feb 2012 15:42:56 +0900, Masataka Ohta said: > George Bonser wrote: > > >> It is seemingly working well means there is not much PMTU changes, > >> which means we had better assumes some PMTU (1280B, for example) and > >> use it without PMTUD. > > > It depends on the OS and the method bei

Re: Common operational misconceptions

2012-02-20 Thread Valdis . Kletnieks
On Sun, 19 Feb 2012 16:24:49 PST, Owen DeLong said: > No, I think you do not understand... > > I have a NAT gateway with a single public address. > > I have 15 FTP servers and 22 web servers behind it. > > I want people to be able to go to ftp:// and/or = > http:// for each of them. > > Please exp

Re: Common operational misconceptions

2012-02-20 Thread Owen DeLong
On Feb 19, 2012, at 5:21 PM, Mark Andrews wrote: > > In message <201202200107.q1k17w5l000...@aurora.sol.net>, Joe Greco writes: I have running code to make the reverse translations, with which protocols such as ftp with PORT commands are working. >>> >>> No, I think you do not underst

Re: Common operational misconceptions

2012-02-19 Thread Masataka Ohta
George Bonser wrote: >> It is seemingly working well means there is not much PMTU changes, >> which means we had better assumes some PMTU (1280B, for example) and >> use it without PMTUD. > It depends on the OS and the method being used. If you set the > option to "2" on Linux, it will do MTU pr

Re: Common operational misconceptions

2012-02-19 Thread Jimmy Hess
On Sun, Feb 19, 2012 at 10:09 PM, Andrew Jones wrote: > On Mon, 20 Feb 2012 11:17:32 +0900, Masataka Ohta > It seems to me that this will create all sorts of headaches for firewall > ALGs. Rather than just passing port 21/tcp traffic to the FTP ALG for > example, the devices would need to inspect

Re: Common operational misconceptions

2012-02-19 Thread Andrew Jones
On Mon, 20 Feb 2012 11:17:32 +0900, Masataka Ohta wrote: >draft-ohta-urlsrv-00.txt > >DNS SRV RRs of a domain implicitly specify servers and port numbers >corresponding to the domain. > >By combining URLs and SRV RRs, no port numbers have to be specified >explicitly in URLs,

Re: Common operational misconceptions

2012-02-19 Thread Masataka Ohta
Owen DeLong wrote: >> I have running code to make the reverse translations, with >> which protocols such as ftp with PORT commands are working. > No, I think you do not understand... How can't I understand several minor issues with the running code. > I have 15 FTP servers and 22 web servers be

Re: Common operational misconceptions

2012-02-19 Thread Karl Auer
On Sun, 2012-02-19 at 19:09 -0600, Jimmy Hess wrote: > For HTTP; You put a device on that one IP that will accept each TCP > connection, await the SNI or Host header from the client, and then > make/forward the connection to a proper server for that hostname. So you need an extra device to w

Re: Common operational misconceptions

2012-02-19 Thread Octavio Alvarez
On Wed, 15 Feb 2012 12:47:15 -0800, John Kristoff wrote: I have a handful of common misconceptions that I'd put on a top 10 list, but I'd like to solicit from this community what it considers to be the most annoying and common operational misconceptions future operators often come a

Re: Common operational misconceptions

2012-02-19 Thread Mark Andrews
In message <201202200107.q1k17w5l000...@aurora.sol.net>, Joe Greco writes: > > > I have running code to make the reverse translations, with > > > which protocols such as ftp with PORT commands are working. > > > > No, I think you do not understand... > > > > I have a NAT gateway with a single pu

Re: Common operational misconceptions

2012-02-19 Thread Jimmy Hess
On Sun, Feb 19, 2012 at 6:24 PM, Owen DeLong wrote: > I have 15 FTP servers and 22 web servers behind it. > I want people to be able to go to ftp:// and/or http:// > for each of them. For HTTP; You put a device on that one IP that will accept each TCP connection, await the SNI or Host header

Re: Common operational misconceptions

2012-02-19 Thread Joe Greco
> > I have running code to make the reverse translations, with > > which protocols such as ftp with PORT commands are working. > > No, I think you do not understand... > > I have a NAT gateway with a single public address. > > I have 15 FTP servers and 22 web servers behind it. > > I want peopl

Re: Common operational misconceptions

2012-02-19 Thread Owen DeLong
On Feb 18, 2012, at 3:31 AM, Masataka Ohta wrote: > David Barak wrote: > >>> From: Owen DeLong o...@delong.com >> >>> Sigh... NAT is a horrible hack that served us all too well in > >> address conservation. Beyond that, it is merely a source of pain. >> >> I understand why you say that - NAT d

Re: Common operational misconceptions

2012-02-18 Thread Michael Painter
Paul Graydon wrote: Yes I'm serious, they were CCNP qualified, hired as a NOC engineer for an ISP & Hosting company. For the company the NOC team was the top tier of customer support (3rd line+), they looked after routers, switches, firewalls, servers, leased lines, and so on. This individual w

Re: Common operational misconceptions

2012-02-18 Thread Justin M. Streiner
On Thu, 16 Feb 2012, Michael Sinatra wrote: There was an old cruddy 1950s building on the UCB campus called Stanley Hall. (Now there's a new, nice, modern building on the UCB campus called Stanley Hall in place of the old one.) It was great to take students on tours through this operational m

RE: Common operational misconceptions

2012-02-18 Thread George Bonser
> Yes I'm serious, they were CCNP qualified, hired as a NOC engineer for > an ISP & Hosting company. There was a time a new hire with all the right holes punched in his ticket deleted an item in an access-list in a PIX that was running an older version of the software than he was familiar with

Re: Common operational misconceptions

2012-02-18 Thread Paul Graydon
On 2/17/2012 10:55 PM, Michael Painter wrote: Paul Graydon wrote: Give me someone who can already think and analyse over someone who 'knows' it all, any day. You can be qualified to the hilt but absolutely useless in the real world (I've watched CCNP and higher struggling to figure out why they

Re: Common operational misconceptions

2012-02-18 Thread Masataka Ohta
David Barak wrote: From: Owen DeLong o...@delong.com Sigh... NAT is a horrible hack that served us all too well in >> address conservation. Beyond that, it is merely a source of pain. I understand why you say that - NAT did yeoman's work in address > conservation. However, it also enabled

Re: Common operational misconceptions

2012-02-18 Thread Jeroen van Aart
Michael Sinatra wrote: The words "Internet" and "Web" can be used interchangeably I prefer the term "intergophers" myself. -- Earthquake Magnitude: 4.9 Date: Friday, February 17, 2012 14:28:20 UTC Location: Komandorskiye Ostrova, Russia region Latitude: 54.5969; Longitude: 168.8863 Depth: 34.7

Re: Common operational misconceptions

2012-02-18 Thread Michael Painter
Paul Graydon wrote: Give me someone who can already think and analyse over someone who 'knows' it all, any day. You can be qualified to the hilt but absolutely useless in the real world (I've watched CCNP and higher struggling to figure out why they can't ping a 10.0.0.0/24 address at a customer

Re: Common operational misconceptions

2012-02-17 Thread Paul Graydon
learn to drive in drivers education. You learned how to drive by driving. Higher education gives you the foundation on which to learn. -Original Message- From: Paul Graydon [mailto:p...@paulgraydon.co.uk] Sent: Friday, February 17, 2012 12:33 PM To: nanog@nanog.org Subject: Re: Common operatio

Re: Common operational misconceptions

2012-02-17 Thread Bob Vaughan
"Ethernet/Token Ring/Cisco Console/whatever uses an RJ45 connector" RJ45 defines a keyed 8P8C type connector, wired in a specific manner, for a specific 2 wire telco service. Incompatible with the above on several levels. "RJxx" == specific connector/wiring pattern for specific telco applic

Re: Common operational misconceptions

2012-02-17 Thread Jimmy Hess
On Wed, Feb 15, 2012 at 4:52 PM, Rich Kulawiec wrote: > ICMP is evil. To that I would add under... Security misconceptions 0. Security is just common sense. a. More draconian/more complicated policies/practices automatically result in a good secure, usable environment.

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
On Feb 17, 2012, at 11:04 AM, valdis.kletni...@vt.edu wrote: > On Fri, 17 Feb 2012 10:49:13 PST, Owen DeLong said: >> Now, come on... If you're in the 40-50 range, you should have put octal >> before hex. :p > > IBM S/360 definitely preferred hex. And EBCDIC. > Strictly an artifact of it's EB

Re: Common operational misconceptions

2012-02-17 Thread R. Sami
When I bring up Linux ISOs to the believers of this misconception, they generally argue that Linux ISOs can be obtained without BitTorrent as well so blocking BT is okay. But I believe it is up to the user to decide which protocol to use to obtain the data and if the user wants to use BT bu

Re: Common operational misconceptions

2012-02-17 Thread Cutler James R
On Feb 17, 2012, at 1:35 PM, Owen DeLong wrote: > On Feb 17, 2012, at 6:52 AM, -Hammer- wrote: > >> Let me simplify that. If you are over 35 you know how to troubleshoot. >> > Is this a statement or something to be added to the list of misconceptions > that are commonplace out there? > > Not tr

Re: Common operational misconceptions

2012-02-17 Thread -Hammer-
I couldn't argue with any of that. Again, there are exceptions on either side. -Hammer- "I was a normal American nerd" -Jack Herer On 2/17/2012 2:40 PM, Ray Soucy wrote: Maybe ;-) I don't think it's an age thing, though. The number of people who have a real interest in technology, and how

Re: Common operational misconceptions

2012-02-17 Thread Ray Soucy
Maybe ;-) I don't think it's an age thing, though. The number of people who have a real interest in technology, and how things work "under the hood" hasn't changed much. I know people 10 years younger than me who can keep up with the best of us, and people 10 years older who are complete failure

Re: Common operational misconceptions

2012-02-17 Thread -Hammer-
Still buzzing over that cheap auto insurance eh? :) Wait till people stop carding you. -Hammer- "I was a normal American nerd" -Jack Herer On 2/17/2012 1:42 PM, Ray Soucy wrote: As someone who was born in 1984 I respectfully disagree. ;-) On Fri, Feb 17, 2012 at 9:52 AM, -Hammer- w

Re: Common operational misconceptions

2012-02-17 Thread Gary Buhrmaster
On Fri, Feb 17, 2012 at 18:06, George Bonser 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 12-24 rack scre

Re: Common operational misconceptions

2012-02-17 Thread Lamar Owen
On Friday, February 17, 2012 01:30:30 AM Carsten Bormann wrote: > Ah, one of the greatest misconceptions still around in 2012: > -- OSI Layer numbers mean something. > or > -- Somewhere in the sky, there is an exact definition of what is layer 2, > layer 3, layer 4, layer 5 (!), layer 7 Misconce

RE: Common operational misconceptions

2012-02-17 Thread Brandt, Ralph
@nanog.org Subject: Re: Common operational misconceptions I often struggle with the concept of teaching someone how to troubleshoot. We have young guys coming in all the time and it is often an area in which they need to hone their skills. I found this article a while back and I keep it bookmarked, it

Re: Common operational misconceptions

2012-02-17 Thread Todd Snyder
as a 33 year old, I'm looking forward to hitting 35 so I can finally understand what you guys are talking about! Will I get some sort of glow or achievement? think I'll get a raise when I can add 'troubleshooting' to my resume? :) On Fri, Feb 17, 2012 at 2:42 PM, Ray Soucy wrote: > As someone

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
I have found that the best solution to persistent hounding goes about like this: "Sir, I'm doing everything I can to resolve the problem as quickly as possible. However, I can focus on giving you status updates every 5 minutes, or, I can focus on resolving the problem. I cannot do both. which wo

Re: Common operational misconceptions

2012-02-17 Thread Randy Bush
> GCOS - 36 bits and Octal and BCD (ASCII added later) > DEC 10 and 20 - 36 bits and Octal > PDP-8 - Octal 704 - was i think 36-bit but the mind fades 704x/709x - 36 bit 1401 - variable word length with BCD+zone-bit encoding per char randy

Re: Common operational misconceptions

2012-02-17 Thread Ray Soucy
As someone who was born in 1984 I respectfully disagree. ;-) On Fri, Feb 17, 2012 at 9:52 AM, -Hammer- 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. > > > -Hammer- > > "I was a nor

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> A tech trying to troubleshoot it and fix it themselves is going to be > hounded every five minutes for status updates and won't be able to get > any work done because every five minutes (I kid you not, I have worked > where that is a requirement) he has to pull his head out of what he is > doing

Re: Common operational misconceptions

2012-02-17 Thread Gary Buhrmaster
On Fri, Feb 17, 2012 at 19:18, Robert Bonomi wrote: > And the  _real_ number crunchers used ones-complement arithmetic. Not to mention 0 had a sign (and 0 did not compare as equal to -0).

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> > 3. Troubleshooting skills are limited to knowing the number of the > vendor's help desk. > > There are no problems! Can't be. And if there are they hire external > experts. BTDT. Those are well paid jobs. I see that a lot and there is often an organizational reason for it. If a tech says "

Re: Common operational misconceptions

2012-02-17 Thread Sven Olaf Kamphuis
missing? That's bad. If not, can you reach the route? Try this radical command that was invented by Steve Jobs while working on his first IPhone (They won't know who Vint Cerf or anyone else is and by using Steves name they will trust you)(I run Android): telnet 1.2.3.4 1433 What? It answered?

Re: Common operational misconceptions

2012-02-17 Thread Tom Perrine
-BEGIN PGP SIGNED MESSAGE- Hash: RIPEMD160 On 2/17/12 11:04 AM, valdis.kletni...@vt.edu wrote: > On Fri, 17 Feb 2012 10:49:13 PST, Owen DeLong said: >> Now, come on... If you're in the 40-50 range, you should have put octal >> before hex. :p > > IBM S/360 definitely preferred hex. And E

Re: Common operational misconceptions

2012-02-17 Thread Jens Link
Owen DeLong writes: > 1.When the only tool you have is a hammer, you try to mold every problem > into a nail. Ack. > 2.When you only know a procedure for doing something and don't understand > the fundamentals > of why X is supposed to occur at step Y, then when you get result A

Re: Common operational misconceptions

2012-02-17 Thread Scott Weeks
I find a lot of new folks have a hard time with the difference in port numbers and protocol numbers. I just went through this with a CC, but with virtually no hands-on experience a few minutes ago. Very disturbing when a person can take the higher level tests, but still can't understand

Re: Common operational misconceptions

2012-02-17 Thread -Hammer-
Well put and great example Owen. -Hammer- "I was a normal American nerd" -Jack Herer On 2/17/2012 12:59 PM, Owen DeLong wrote: This reminds me of what I think is the biggest root misconception of the 20th and 21st centuries: Rapid step-by-step training can replace conceptual education on t

Re: Common operational misconceptions

2012-02-17 Thread -Hammer-
rea From: -Hammer- [bhmc...@gmail.com] Sent: Friday, February 17, 2012 9:52 AM To: nanog@nanog.org Subject: Re: Common operational misconceptions Let me simplify that. If you are over 35 you know how to troubleshoot. Yes, I'm going to get flamed. Yes, there

Re: Common operational misconceptions

2012-02-17 Thread Robert Bonomi
> From nanog-bounces+bonomi=mail.r-bonomi@nanog.org Fri Feb 17 13:11:28 > 2012 > To: Owen DeLong > Subject: Re: Common operational misconceptions > From: valdis.kletni...@vt.edu > Date: Fri, 17 Feb 2012 14:04:45 -0500 > Cc: "nanog@nanog.org" > > O

Re: Common operational misconceptions

2012-02-17 Thread Valdis . Kletnieks
On Fri, 17 Feb 2012 10:49:13 PST, Owen DeLong said: > Now, come on... If you're in the 40-50 range, you should have put octal > before hex. :p IBM S/360 definitely preferred hex. And EBCDIC. pgpJXJPC98gau.pgp Description: PGP signature

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
This reminds me of what I think is the biggest root misconception of the 20th and 21st centuries: Rapid step-by-step training can replace conceptual education on the fundamentals. In other words, we have moved from the old-school of teaching people why things work and how they work to a newer

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
ever seen this problem or a related one? At this point >> your going to have to really troubleshoot, not just go on experience. >> >> Mario Eirea >> >> From: -Hammer- [bhmc...@gmail.com] >> Sent: Friday, February 17, 2

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
On Feb 17, 2012, at 7:20 AM, David Barak wrote: >> From: Owen DeLong o...@delong.com > >> Sigh... NAT is a horrible hack that served us all too well in address >> conservation. Beyond that, it is merely a source of pain. > > I understand why you say that - NAT did yeoman's work in address > c

RE: Common operational misconceptions

2012-02-17 Thread Kenneth M. Chipps Ph.D.
in drivers education. You learned how to drive by driving. Higher education gives you the foundation on which to learn. -Original Message- From: Paul Graydon [mailto:p...@paulgraydon.co.uk] Sent: Friday, February 17, 2012 12:33 PM To: nanog@nanog.org Subject: Re: Common operational

Re: Common operational misconceptions

2012-02-17 Thread Owen DeLong
On Feb 17, 2012, at 6:52 AM, -Hammer- wrote: > Let me simplify that. If you are over 35 you know how to troubleshoot. > Is this a statement or something to be added to the list of misconceptions that are commonplace out there? Not trying to be flip... Honestly asking the question. I can see i

Re: Common operational misconceptions

2012-02-17 Thread Paul Graydon
On 02/17/2012 04:29 AM, Leo Bicknell wrote: In a message written on Thu, Feb 16, 2012 at 08:50:11PM -1000, Paul Graydon wrote: At the same time, it's shocking how many network people I come across with no real grasp of even what OSI means by each layer, even if it's only in theory. Just having

Re: Common operational misconceptions

2012-02-17 Thread Jens Link
Leo Bicknell writes: > I've repeatedly asked $BIG_COLO_PROVIDERS to offer a vending machine > in the lobby next to the one with sodas that sold Cat 5, Fiber, > SFP's, USB sticks, and so on. Hmm. http://gearomat.com/ Jens -- ---

RE: Common operational misconceptions

2012-02-17 Thread Brandt, Ralph
...@pateam.com 5095 Ritter Rd Mechanicsburg PA 17055 -Original Message- From: Scott Helms [mailto:khe...@ispalliance.net] Sent: Friday, February 17, 2012 11:24 AM To: nanog@nanog.org Subject: Re: Common operational misconceptions On 2/17/2012 10:18 AM, Steve Clark wrote: > I agree with this

Re: Common operational misconceptions

2012-02-17 Thread Jay Ashworth
- Original Message - > From: "Mike Andrews" > > > Which is a common transport problem I often see, "Our > > > configuration looks right, it must be on your end." > > > > If i had a dollar for everytime i've heard that from a telco, i'd be > > a rich man... > > That and "I'm getting a goo

Re: Common operational misconceptions

2012-02-17 Thread Leo Bicknell
In a message written on Fri, Feb 17, 2012 at 06:06:52PM +, George Bonser wrote: > Heh, that's been a notion I have had for a while. Opening an all-night shop > somewhere in Silicon Valley that sold patch cords, memory sticks, disk > drives, maybe even common router blades, optics modules, f

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> > Wow... would be handy if Radio Shack stocked router modules and > blades, > and chassis to test your suspect ones? :) > > (Yes, remember the tube testers as well...) > > Jeff Heh, that's been a notion I have had for a while. Opening an all-night shop somewhere in Silicon Valley that so

Re: Common operational misconceptions

2012-02-17 Thread Jared Mauch
I am grateful you have not used the hardware I have in the past 15 years. I haven't seen anything recently not do it, but when interfacing with a customer who knows what old stuff they may be using. Jared Mauch On Feb 17, 2012, at 12:41 PM, Sven Olaf Kamphuis wrote: > auto mdi/mii breaks teh

Re: Common operational misconceptions

2012-02-17 Thread Jeff Kell
On 2/17/2012 12:00 PM, Gary Buhrmaster wrote: > If the TV went on the blink (they all did then), you opened up the > back, looked for fried components, and if one of the resistors was > smoking, you soldered in a replacement. Or you took the tubes down to > the local drugstore and tested them. Wow

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> Long before there was a Grainger (and Home Depot) in every city, and > you could get parts shipped overnight, one had to "make do", and > "making do" meant being able to figure things out to be able to "git r > done" > with what you had on hand, or could figure out. > > When working on my Grandf

Re: Common operational misconceptions

2012-02-17 Thread Jerry Jones
On Feb 17, 2012, at 11:33 AM, John Osmon wrote: On Fri, Feb 17, 2012 at 10:18:57AM -0500, Steve Clark wrote: > I agree with this 100%. > > Having worked with many people over the last 40 years, the good trouble > shooters understood how things > were suppose to work. This helps immeasurably in

Re: Common operational misconceptions

2012-02-17 Thread Sven Olaf Kamphuis
On Fri, 17 Feb 2012, Jens Link wrote: Mathias Wolkert writes: Autoneg. The old timers that don't trust it after a few decades of decent code. Or those that lock one side and expect the other to adjust to that. you are referring to ehh *kuch* certain internet exchanges *kuch* ? :P auto mdi

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> BTW, I am a school board member who votes 1:8 often on things But > let me give you a perspective, one of the board members called Golf an > "Essential Life Skill." Maybe, but how about balancing a checkbook... > > Ralph Brandt > Communications Engineer > HP Enterprise Services One of the

Re: Common operational misconceptions

2012-02-17 Thread Jens Link
Mathias Wolkert writes: > Autoneg. The old timers that don't trust it after a few decades of > decent code. Or those that lock one side and expect the other to adjust > to that. Autoneg is black magic. Doesn't work. You have manually configure duplex and speed on one side 1! SCNR Jens --

Re: Common operational misconceptions

2012-02-17 Thread John Osmon
On Fri, Feb 17, 2012 at 10:18:57AM -0500, Steve Clark wrote: > I agree with this 100%. > > Having worked with many people over the last 40 years, the good trouble > shooters understood how things > were suppose to work. This helps immeasurably in determining where to start > looking. Don't forg

Re: Common operational misconceptions

2012-02-17 Thread Jens Link
Mark Grigsby writes: > Speaking in the context of configuring an ipsec tunnel.. Once upon a time: Admin: "We need Port 50 and Port 51 for the tunnel!" Me:"You mean IP protocol 50 and 51?" Admin: "It the same! You have no clue!" Jens --

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> > I wouldn't call it a "misconception", but I want to echo Paul's > comment. I would venture over 90% of the engineers I work with have no > idea how to troubleshoot properly. Thinking back to my own education, > I don't recall anyone in highschool or college attempting to teach > troubleshoot

Re: Common operational misconceptions

2012-02-17 Thread Sven Olaf Kamphuis
wasn't tv already tackled by dvb-iptv + multicast (oh wait, multicast, that stuff that hardly ever globally works on ipv4 ;) (yes, i'm that old that i even know what a tv was ;) On Fri, 17 Feb 2012, Eugen Leitl wrote: On Fri, Feb 17, 2012 at 10:33:12AM -0500, Jay Ashworth wrote: - Origin

Re: Common operational misconceptions

2012-02-17 Thread Marcel Plug
gt; point your going to have to really troubleshoot, not just go on experience. >> >> Mario Eirea >> >> From: -Hammer- [bhmc...@gmail.com] >> Sent: Friday, February 17, 2012 9:52 AM >> To: nanog@nanog.org >> Subje

Re: Common operational misconceptions

2012-02-17 Thread Mike Andrews
On Fri, Feb 17, 2012 at 08:46:02AM -0800, Mike Lyon wrote: > Sent from my iPhone > > On Feb 17, 2012, at 7:48, Jack Bates wrote: > > > > > > > On 2/17/2012 9:18 AM, Steve Clark wrote: > >> Having worked with many people over the last 40 years, the good trouble > >> shooters understood how things

Re: Common operational misconceptions

2012-02-17 Thread Gary Buhrmaster
On Fri, Feb 17, 2012 at 06:52, -Hammer- 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 Depot) in ever

Re: Common operational misconceptions

2012-02-17 Thread Mike Lyon
Sent from my iPhone On Feb 17, 2012, at 7:48, Jack Bates wrote: > > > On 2/17/2012 9:18 AM, Steve Clark wrote: >> Having worked with many people over the last 40 years, the good trouble >> shooters understood how things >> were suppose to work. This helps immeasurably in determining where to >>

Re: Common operational misconceptions

2012-02-17 Thread Eugen Leitl
On Fri, Feb 17, 2012 at 10:33:12AM -0500, Jay Ashworth wrote: > - Original Message - > > From: "Ridwan Sami" > > > There is no legitimate reason for a user to use BitTorrent (someone > > will probably disagree with this). > > Yeah, no. > > You've clearly never tried to download a Linux

Re: Common operational misconceptions

2012-02-17 Thread Scott Helms
On 2/17/2012 10:18 AM, Steve Clark wrote: I agree with this 100%. Having worked with many people over the last 40 years, the good trouble shooters understood how things were suppose to work. This helps immeasurably in determining where to start looking. This is dead on and why I always sta

RE: Common operational misconceptions

2012-02-17 Thread Mario Eirea
list. :-) Mario Eirea From: -Hammer- [bhmc...@gmail.com] Sent: Friday, February 17, 2012 10:51 AM To: Mario Eirea Cc: nanog@nanog.org Subject: Re: Common operational misconceptions Mario, I was kinda having fun and kinda not. My point is that the 40-50

RE: Common operational misconceptions

2012-02-17 Thread George Bonser
> > It depends on how you define "work well". > > As the RFC says: > >indication of some significantly disruptive event in the network, >such as a router failure or a routing change to a path with a > smaller >MTU. > > it can not react against PMTU changes very well. > > It is seem

Re: Common operational misconceptions

2012-02-17 Thread Jack Bates
On 2/17/2012 10:04 AM, John Kristoff wrote: I was waiting for the thread to eventually end Greatest misconception of all. Jack

Re: Common operational misconceptions

2012-02-17 Thread John Kristoff
On Fri, 17 Feb 2012 08:29:42 -0600 -Hammer- wrote: > This list is awesome. Is anyone consolidating it? I'm still catching > up on the thread I'm collecting all responses, many of which have been sent to me off list. I was waiting for the thread to eventually end before summarizing it. Than

Re: Common operational misconceptions

2012-02-17 Thread Charles Mills
Original poster who started thread said he would. On Fri, Feb 17, 2012 at 10:51 AM, -Hammer- wrote: > If you do, please share it. Thank you. > > > -Hammer- > > "I was a normal American nerd" > -Jack Herer > > > > On 2/17/2012 9:36 AM, Jared Mauch wrote: > >> On Feb 17, 2012, at 9:29 AM, -Hammer-

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