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CPE and bufferbloat
by Michael Thomas 15 Jul '20

15 Jul '20

Given the new stresses of teleworking on the infrastructure, have providers been getting more calls about "the internetz are slow"? And if so, can you attribute any of it to bufferbloat? Anecdotally, I once had to hunt down a problem where the network was slagged because a friend was downloading a big game and it took me like over an hour to figuring out what was going on. I got a new router and flashed openWRT and turned on the shaping and it went from really bad to pretty unnoticable. Most people are probably just going to contact the help desk. Of course anything in the upstream would have been even worse, which of course things like Zoom tickle heavily. Mike

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Re: favorite network troubleshooting tools (online)
by Scott Weeks 15 Jul '20

15 Jul '20

On 15/07/2020 10:37, Mehmet Akcin wrote: > what are your favorite network troubleshooting tools? ---------------------------------------------- syslog :) scott

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Re: questions asked during network engineer interview
by Scott Weeks 14 Jul '20

14 Jul '20

--- mpetach(a)netflight.com wrote: From: Matthew Petach <mpetach(a)netflight.com> On Tue, Jul 14, 2020, 11:00 Ahmed elBorno <amaged(a)gmail.com> wrote: > I had less than two years experience. > > The interviewer asked me: > [...] > 2) If we had a 1GB file that we need to transfer between America and > Europe, how much time do we need, knowing that we start with a TCP size of > X? > I *love* questions like that, because I can immediately respond back with "well, that depends; did your sysadmin configure rfc1323 extension support in your TCP stack? Is SACK enabled? What about window scaling? Does your OS do dynamic buffer tuning for TCP, or are the values locked in at start time?" ------------------------------------------------ I'm not so sure someone with only 2 years experience would know that. scott

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Looking for an admin at Solarwinds MSP/Mail Assure
by Mark Spring 14 Jul '20

14 Jul '20

Does anybody have a contact at Solarwinds MSP where I could troubleshoot some issues with receiving messages from their Mail Assure platform? We have several users/domains that cannot receive messages from them and I don't see any connections from their servers at the TCP level that I can troubleshoot. It seems like they are holding onto old records but the admins that hold the service contract have not been able to produce any kind of logs from their support. When they send a message they get 5.0.0 response, but the same thing happened when they typ-o'd the domain which tells me it's a bad lookup on their server. I'm happy to work with anybody at solarwinds MSP or anybody else that might be able to shed some light on this. My users are just having issues receiving the message from solarwinds customers but I'm happy to put any amount of my resources into getting this resolved. Mark Spring Information Systems Manager -- NKTelco 301 W. South St.New Knoxville, OH 45871 Phone: 1-888-NKTELCO Fax: 419-753-2950 This message and the file(s) attached are confidential and proprietary information of NKTelco for the sole use of the intended recipient. Any unauthorized review, distribution, disclosure, copying, use, or dissemination, either whole or in part, is strictly prohibited. Do not transmit these documents, in any form, to any third party without the expressed written permission of NKTelco.

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netflix and ipv6
by Bajpai, Vaibhav 14 Jul '20

14 Jul '20

Hi NANOG, We measured NETFLIX over v6 for the last couple of years. The paper describing this research is now online, thought to share: -- Vaibhav A Longitudinal View of Netflix: Content Delivery over IPv6 and Content Cache Deployments paper: https://bit.ly/2toOGWP slides: https://bit.ly/2ZoEpap video: https://vimeo.com/437111302 ------------------------------ Vaibhav Bajpai, www.vaibhavbajpai.com

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Tool to build RPSL objects and push it to IRR
by Douglas Fischer 14 Jul '20

14 Jul '20

TL;DR. There are several tools[1] to automate the creation of Prefix Filtering on Internet Routing. I want the opposite! A tool to help-me to create/alter/delete IRR Objects based on the information of my Cone. Sad history ----------- For a long time, I'm creating some auxiliary scripts to do the repetitive job to our team. I'm not a good dev! I even wouldn't say that I'm a dev.(I'm studying to improve) One of these jobs is to create and maintain the IRR Objects related to our small ITP operation. So I created a horrible Frankenstein... Based o pure bash, with a lot of SED and AWK, that only I can understand. And even for me, takes at least a half-day of immersion to change anything and don't break what is working. (I'm pretty sure that this history is familiar to all of you...) And then... I am looking for a tool that can help to: - Based on some sort o information set (maybe YAML) - Check if the needed Objects already exists. - If not - Create the RPSL record. - Push it to IRR (via e-mail as RPSL defines, ou API specifically to RADB) Is there already a tool that does what I'm looking for? Complement: Objects like AS-SET and Route/Route6 are kind of simple to create! Aut-num, with all the (mp-)import/export syntax of routing policy, are mind-breaker to me. But, Aut-num is not on the first target... [1] BGPq3, BGPq4, IRRPowerTools, IRRToolset. -- Douglas Fernando Fischer Engº de Controle e Automação

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Anyone running C-Data OLTs?
by Owen DeLong 13 Jul '20

13 Jul '20

https://www.zdnet.com/article/backdoor-accounts-discovered-in-29-ftth-devic… <https://www.zdnet.com/article/backdoor-accounts-discovered-in-29-ftth-devic…> Wow… Just wow. Owen

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SaoPaolo to Frankfurt
by Max Tulyev 13 Jul '20

13 Jul '20

Hi All! Who can provide a VLAN from SaoPaolo to Frankfurt for remote IX.BR participation? Please contact me off-list. I see there is only one undersea cable going directly from Brazil to Europe. Why?

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Re: 60ms cross continent
by Joel M Snyder 13 Jul '20

13 Jul '20

On Jul 8, 2020, at 3:05 AM, Mark Tinka <mark.tinka(a)seacom.com> wrote: >Satellite earth stations are not irrelevant, however. They still do get >used to provide satellite-based TV services, and can also be used for >media houses who need to hook up to their network to broadcast video >when reporting in the region (even though uploading a raw file back >home over the Internet is where the tech. has now gone). Oh man I wish that were wholly true... Satellite/VSAT has another very very important attribute: it's not subject to the whims of the local government or regulators. So when there's an election or some unrest or coup or the prime minister has very bad flatulence, and some person says "turn off the Internet," your non-terrestrial connection is there so that you can continue to do business. Right now I'm in the middle of a project installing more than 300 VSATs, replacing an incumbent provider, and the rationale for all that money and all that equipment and all that work is "the bits must flow." (Plus, there are also still many places outside of capital cities in the world where the Internet is truly awful and if you want bits, you have to bring your own) jms -- Joel M Snyder, 1404 East Lind Road, Tucson, AZ, 85719 Senior Partner, Opus One Phone: +1 520 324 0494 jms(a)Opus1.COM http://www.opus1.com/jms

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4G / 5G backup
by Baldur Norddahl 12 Jul '20

12 Jul '20

Hello I am looking for a CPE product that can use the 4G and soon 5G cell network as backup to our fiber. The product should create a VPN back to our network, so the customer can keep his IPv4/IPv6 address and all other services running as normal except maybe at a lower speed. I imagine this CPE router could use BGP to announce itself through both the fiber and the cell backup. Are somebody doing this and what can you recommend? Thanks Baldur

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