May 2009 - Test - lists.nanog.org

navog?
by david hiers 29 May '09

29 May '09

Hi, Is anyone aware of a voip-focused group similar to nanog? Us voip pukes have to deal with the issues of allocation, routing, and management of phone numbers as well as networks, and I have not found a voice operators' group similar to this network operators' group. Thanks, David

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DNS ed.gov translations
by Peter Charbonneau 29 May '09

29 May '09

Greetings, Periodically, we loose the capability of translating .ed.gov names. Today, it seems that it is www.dl.ed.gov and www.fafsa.ed.gov that will not translate. If I use dig .... I get: porthos2:~ pcharbon2$ dig +trace www.fafsa.ed.gov ; <<>> DiG 9.4.3-P1 <<>> +trace www.fafsa.ed.gov ;; global options: printcmd . 499251 IN NS L.ROOT-SERVERS.NET. . 499251 IN NS M.ROOT-SERVERS.NET. . 499251 IN NS H.ROOT-SERVERS.NET. . 499251 IN NS D.ROOT-SERVERS.NET. . 499251 IN NS A.ROOT-SERVERS.NET. . 499251 IN NS K.ROOT-SERVERS.NET. . 499251 IN NS B.ROOT-SERVERS.NET. . 499251 IN NS G.ROOT-SERVERS.NET. . 499251 IN NS E.ROOT-SERVERS.NET. . 499251 IN NS I.ROOT-SERVERS.NET. . 499251 IN NS J.ROOT-SERVERS.NET. . 499251 IN NS C.ROOT-SERVERS.NET. . 499251 IN NS F.ROOT-SERVERS.NET. ;; Received 488 bytes from 137.165.4.21#53(137.165.4.21) in 2 ms gov. 172800 IN NS E.GOV.ZONEEDIT.COM. gov. 172800 IN NS G.GOV.ZONEEDIT.COM. gov. 172800 IN NS A.GOV.ZONEEDIT.COM. gov. 172800 IN NS B.GOV.ZONEEDIT.COM. gov. 172800 IN NS C.GOV.ZONEEDIT.COM. gov. 172800 IN NS D.GOV.ZONEEDIT.COM. gov. 172800 IN NS F.GOV.ZONEEDIT.COM. ;; Received 274 bytes from 192.203.230.10#53(E.ROOT-SERVERS.NET) in 82 ms ed.gov. 86400 IN NS eduptcdns02.ed.gov. ed.gov. 86400 IN NS eduftcdns01.ed.gov. ed.gov. 86400 IN NS eduftcdns02.ed.gov. ed.gov. 86400 IN NS eduptcdns01.ed.gov. ;; Received 202 bytes from 216.55.155.29#53(A.GOV.ZONEEDIT.COM) in 84 ms dig: couldn't get address for 'eduftcdns01.ed.gov': not found porthos2:~ pcharbon2$ It always seems to fail after the "third" lookup sequence. After about an hour (or two or eight) it starts working again for some period of time. I am out of troubleshooting tools and don't know where to go from here. Any help would be greatly appreciated. PeteC Peter Charbonneau Sr. Network and Systems Administrator Williams College (413) 597-3408 (office) (413) 822-2922 (cell) OIT will NEVER ask for your password!

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RE: problems with cisco 7200 and PA-T3
by Carlos Alcantar 28 May '09

28 May '09

Adam you could be tx the errors so your interface won't see them. On the other side of the circuit are they seeing errors on the rx. -carlos -----Original Message----- From: Adam Goodman [mailto:adam@wispring.com] Sent: Thursday, May 28, 2009 3:44 PM To: nanog(a)nanog.org Subject: problems with cisco 7200 and PA-T3 Just installed a cisco 7204vxr with a DS3 interface. we are not getting more than 5Mbits. show interface is not reporting any errors. the provider tech put a piece test equipment on the circuit and sees errors. Does anyone else use a cisco 7200 with a DS3 interface that we might be able to speak with? Please hit me off list Thank you, Adam 801.971.1856

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MX Record Theories
by gb10hkzo-nanog＠yahoo.co.uk 28 May '09

28 May '09

Hello all, First, I hope this is not off-topic for NANOG, please be gentle with me as this is my first post. I would be most interested to hear NANOG theories on the variety of MX record practices out there, namely, how come there seem to be so many ways employed to achieve the same goal ? Do you have experience in more than one of these methods and which do you favour ? To illustrate my question : (1) If you query the MX records for, Hotmail or AOL you will receive 4 equal weight MX records, each of the MX records having a round-robin set of IPs. e.g. hotmail.com. 2706 IN MX 5 mx4.hotmail.com. hotmail.com. 2706 IN MX 5 mx1.hotmail.com. hotmail.com. 2706 IN MX 5 mx2.hotmail.com. hotmail.com. 2706 IN MX 5 mx3.hotmail.com. -and- mx3.hotmail.com. 1926 IN A 65.xxxxxxx mx3.hotmail.com. 1926 IN A 65.xxxxxxx mx3.hotmail.com. 1926 IN A 65.xxxxxxx etc.etc. (2) Alternatively, some people, particularly the ones that use hosted filtering, tend to have one MX record, which as multiple round robin IPs. e.g. microsoft.com. 780 IN MX 10 mail.global.frontbridge.com. -and- mail.global.frontbridge.com. 1728 IN A 65.xxxxxxx mail.global.frontbridge.com. 1728 IN A 207.xxxxxxx etc. etc. (3) And others simply have a more traditional setup using multiple MX records and only one IP per MX record with no round robin apple.com. 931 IN MX 10 mail-in14.apple.com. apple.com. 931 IN MX 20 mail-in3.apple.com. apple.com. 931 IN MX 20 eg-mail-in2.apple.com. etc.etc. So what's the big deal ? Please note I'm not asking which is "better" ... I am just curious and interested to hear your professional opinions and experiences. Personally, I favour the simple option 3, multiple MX records. Thanks y'all.

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Packet loss statistics
by Ric Messier 28 May '09

28 May '09

Is anyone aware of useful resources for packet loss over large LANs and WANs? Google turned up a nice statistics page for Qwest's network but not much else that seems useful to me. Our testing teams are trying to simulate expected network conditions and rather than go overboard, having something close to real-world parameters would be nice. Thanks! Ric

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Re: Why choose 120 volts?
by Brandon Butterworth 28 May '09

28 May '09

> > Admittedly no one I know is nuts enough to use body parts > > for "liveness testing". Depends whose parts they're using > Just to make things clear, I am NOT going to suggest you should do so, > just telling you what I think I heared. I'm waiting for Randy to suggest his competitors do so brandon

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XO fiber cut (unverified) in St. Louis, MO
by Major Hayden 28 May '09

28 May '09

I've heard an unverified report that XO may have a fiber cut somewhere in St. Louis. Has anyone heard something similar? -- Major Hayden major(a)mhtx.net

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Why choose 120 volts?
by Seth Mattinen 28 May '09

28 May '09

I have a pure curiosity question for the NANOG crowd here. If you run your facility/datacenter/cage/rack on 120 volts, why? I've been running my facility at 208 for years because I can get away with lower amperage circuits. I'm curious about the reasons for using high-amp 120 volt circuits to drive racks of equipment instead of low-amp 208 or 240 volt circuits. ~Seth

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RIPE NCC does a series of interviews about IPv6 deployment
by Alex Band 28 May '09

28 May '09

As part of our IPv6 training project, that consists of face to face training and on-line learning modules and testimonials, I am proud to announce the first in a series of interviews. Andy Davidson of NetSumo ISP Consultancy discusses the IPv6 deployment they have done for their customers and themselves: http://www.youtube.com/watch?v=QCcigLJJbvU So far, we have interviewed 22 people from the community about their experiences and are very busy editing all the video material. In the coming months, you will be able to enjoy the rest of the interviews here: http://www.youtube.com/user/RIPENCC These interviews will also be published on our e-learning page and on our IPv6 Act Now website: http://ripe.net/training/e-learning/ http://www.ipv6actnow.org/ Cheers, Alex Band RIPE NCC

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Re: Packet loss statistics
by Chris Robb 28 May '09

28 May '09

The Internet2 network publishes 10-second data for all interfaces on both its backbone network and the individual racklans in each of its cities: Backbone: http://dc-snmp.grnoc.iu.edu/i2net/ Racklans: http://dc-snmp.grnoc.iu.edu/i2net-hp/ Default graphs don't show errors. You need to create a custom graph and click the appropriate checkbox. If you want to view a large number of interfaces with their errors on a single page, you can create a Custom View that includes errors for any number of selected interfaces. -Chris On May 28, 2009, at 12:03 PM, Ric Messier wrote: > > Is anyone aware of useful resources for packet loss over large LANs > and WANs? Google turned up a nice statistics page for Qwest's > network but not much else that seems useful to me. > > Our testing teams are trying to simulate expected network conditions > and rather than go overboard, having something close to real-world > parameters would be nice. > > Thanks! > Ric > Chris Robb, Internet2 Manager of Operations O: 812.855.8604 C: 812.345.3188 **************** ESCC/Internet2 Joint Techs July 19-23, 2009 - Indianapolis, Indiana http://jointtechs.es.net/indiana2009/

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