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Practical guide to predicting latency effects?
by Adam Thompson 09 Apr '20

09 Apr '20

I’m looking for a practical guide – i.e. specifically NOT an academic paper, thanks anyway – to predicting the effect of increased (or decreased) latency on my user’s applications. Specifically, I want to estimate how much improvement there will be in {bandwidth, application XYZ responsiveness, protocol ABC goodput, whatever} if I decrease the RTT between the user and the server by 10msec, or by 20msec, or by 40msec. My googling has come up with lots of research articles discussing theoretical frameworks for figuring this out, but nothing concrete in terms of a calculator or even a rule-of-thumb. Ultimately, this goes into MY calculator – we have the usual north-american duopoly on last-mile consumer internet here; I’m connected directly to only one of the two. There’s a cost $X to improve connectivity so I’m peered with both, how do I tell if it will be worthwhile? Anyone got anything at all that might help me? Thanks in advance, -Adam Adam Thompson Consultant, Infrastructure Services [[MERLIN LOGO]]<https://www.merlin.mb.ca/> 100 - 135 Innovation Drive Winnipeg, MB, R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) athompson(a)merlin.mb.ca<mailto:athompson@merlin.mb.ca> www.merlin.mb.ca<http://www.merlin.mb.ca/>

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RE: Practical guide to predicting latency effects?
by Jakob Heitz (jheitz) 08 Apr '20

08 Apr '20

My data point: I'm working from home. My computer is connected through company VPN, over wifi to Comcast. Comcast speed test says 18mS. I use VNC and Webex with voice and video through the computer. VNC response time and voice delay is not noticeable. Regards, Jakob. -----Original Message----- Date: Tue, 7 Apr 2020 22:52:18 +0000 From: Adam Thompson <athompson(a)merlin.mb.ca> I’m looking for a practical guide – i.e. specifically NOT an academic paper, thanks anyway – to predicting the effect of increased (or decreased) latency on my user’s applications. Specifically, I want to estimate how much improvement there will be in {bandwidth, application XYZ responsiveness, protocol ABC goodput, whatever} if I decrease the RTT between the user and the server by 10msec, or by 20msec, or by 40msec. My googling has come up with lots of research articles discussing theoretical frameworks for figuring this out, but nothing concrete in terms of a calculator or even a rule-of-thumb. Ultimately, this goes into MY calculator – we have the usual north-american duopoly on last-mile consumer internet here; I’m connected directly to only one of the two. There’s a cost $X to improve connectivity so I’m peered with both, how do I tell if it will be worthwhile? Anyone got anything at all that might help me? Thanks in advance, -Adam Adam Thompson Consultant, Infrastructure Services [[MERLIN LOGO]]<https://www.merlin.mb.ca/> 100 - 135 Innovation Drive Winnipeg, MB, R3T 6A8 (204) 977-6824 or 1-800-430-6404 (MB only) athompson(a)merlin.mb.ca<mailto:athompson@merlin.mb.ca> www.merlin.mb.ca<http://www.merlin.mb.ca/>

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RE: [nanog] Traffic destined for 100.114.128.0/24
by Michel Py 08 Apr '20

08 Apr '20

> Drew Weaver wrote : > I've noticed over the past couple of weeks that some hosts on a network I > manage appear to be trying to reach hosts in this network 100.114.128.0/24 It's part of 100.64.0.0/10 that is used for CGN. Possibly, this is the by-product of a protocol such as SIP that embeds its own IP address into the packet, and there is no ALG. The host on your network is trying to talk to the inside NAT address of the other host. It is similar to seing trafic leaving your network for RFC1918 addresses. Michel. TSI Disclaimer: This message and any files or text attached to it are intended only for the recipients named above and contain information that may be confidential or privileged. If you are not the intended recipient, you must not forward, copy, use or otherwise disclose this communication or the information contained herein. In the event you have received this message in error, please notify the sender immediately by replying to this message, and then delete all copies of it from your system. Thank you!...

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best email list?
by David Funderburk 08 Apr '20

08 Apr '20

What email list companies or direct mail have you used with success? During this time I feel there are many companies that are or should be considering off-site back ups or putting in remote servers. I'd like to contact some of these who could benefit from our data center. Suggestions? -- Regards, David Funderburk GlobalVision 864-569-0703 -- This message has been scanned by E.F.A. Project and is believed to be clean.

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Telehouse North 2 Temperatures
by Bradley Raymo 08 Apr '20

08 Apr '20

Hello, I am seeing increased temperatures in our cage in THN2 and I am curious if anyone else has noticed this as well. If you have gear in THN2 could you let me know if you have seen an increase in Temps over the past week or so? Thanks Brad

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Spoofer Report for NANOG for Mar 2020
by CAIDA Spoofer Project 08 Apr '20

08 Apr '20

In response to feedback from operational security communities, CAIDA's source address validation measurement project (https://spoofer.caida.org) is automatically generating monthly reports of ASes originating prefixes in BGP for systems from which we received packets with a spoofed source address. We are publishing these reports to network and security operations lists in order to ensure this information reaches operational contacts in these ASes. This report summarises tests conducted within usa, can. Inferred improvements during Mar 2020: ASN Name Fixed-By 6128 CABLE-NET-1 2020-03-02 11827 WSU 2020-03-03 32329 MONKEYBRAINS 2020-03-04 11427 TWC-11427-TEXAS 2020-03-26 11525 HRTC 2020-03-26 396073 MAJESTIC-HOSTING-01 2020-03-31 Further information for the inferred remediation is available at: https://spoofer.caida.org/remedy.php Source Address Validation issues inferred during Mar 2020: ASN Name First-Spoofed Last-Spoofed 577 BACOM 2016-03-09 2020-03-12 209 CENTURYLINK-US-LEGACY-QWEST 2016-08-16 2020-03-25 6128 CABLE-NET-1 2016-09-03 2020-03-30 7459 GRANDECOM-AS1 2016-09-26 2020-03-26 20412 CLARITY-TELECOM 2016-09-30 2020-03-28 6181 FUSE-NET 2016-10-10 2020-03-31 11427 TWC-11427-TEXAS 2016-10-21 2020-03-07 174 COGENT-174 2016-10-21 2020-03-31 32440 LONI 2016-11-03 2020-03-28 12083 WOW-INTERNET 2016-11-09 2020-03-31 39939 RISE-CO-AS39939 2016-11-11 2020-03-02 1403 EBOX 2016-11-12 2020-03-09 701 UUNET 2017-06-14 2020-03-17 6461 ZAYO-6461 2017-06-21 2020-03-04 63296 AWBROADBAND 2017-09-01 2020-03-31 546 PARSONS-PGS-1 2017-11-20 2020-03-26 12222 AKAMAI 2018-02-14 2020-03-15 393564 SPOKANE 2018-06-05 2020-03-10 20448 VPNTRANET-LLC 2018-09-20 2020-03-23 63275 RADIOWIRE 2019-02-07 2020-03-11 8047 GCI 2019-04-11 2020-03-25 46300 HSC-WAP 2019-10-30 2020-03-26 2886 EC-813-2886 2019-11-05 2020-03-25 21859 ZNET 2019-12-26 2020-03-25 12231 CONWAYCORP 2020-01-10 2020-03-26 239 UTORONTO 2020-01-28 2020-03-28 13614 ALLWEST 2020-03-16 2020-03-24 51043 ASPIRE01 2020-03-17 2020-03-17 26335 MTSU 2020-03-20 2020-03-20 Further information for these tests where we received spoofed packets is available at: https://spoofer.caida.org/recent_tests.php?country_include=usa,can&no_block… Please send any feedback or suggestions to spoofer-info(a)caida.org

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Looking for contact in Sydney
by Alexandre Legrix 08 Apr '20

08 Apr '20

Hi NANog community, In Sydney ASX datacentre, I am looking to perform an iperf test from one of my transmission equipment. For that purpose I am looking to rent a server (2 weeks or 1 month)+ installation in the datacentre with following specs: - Capable of running a 500M iperf 2.0.9 test - Network connectivity in SMF (100BASE-LX) preferred but we can accommodate copper Would one of you able to provide such services and provide me a quote for it? Thanks in advance for your feedback, Please contact us me and Eymeric in cc outside the ML if you can get any proposal Best Regards -- Alexandre

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Re: COVID-19 vs. our Networks
by Scott Weeks 07 Apr '20

07 Apr '20

We do about 70-80Gbps at peak over the external BGP links we have and I am not seeing a large increase nor am I seeing it spread out over time. We're an eyeball network plus some really large customers. Anyone else seeing something different? We're now into the 3rd day, so I thought I'd see something change by now. scott

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IS-IS on FRR - Is Anyone Running It?
by Mark Tinka 07 Apr '20

07 Apr '20

Hi all. So I finally decided to start messing around with FRR for a native IS-IS deployment for some of our FreeBSD-based Anycast services. I hit an issue that I posted to the FRR list that hasn't progressed beyond identifying a bug: 2020/03/21 03:12:36 ISIS: isis_send_pdu_bcast: sock_buff size 8192 is less than output pdu size 9014 on circuit em0 2020/03/21 03:12:36 ISIS: [EC 67108865] ISIS-Adj (1): Send L2 IIH on em0 failed This is being addressed here: https://github.com/FRRouting/frr/pull/6066 But my main question was if there was a command or setting in zebra.conf and/or isisd.conf that I can use to define the MTU IS-IS should use to set itself up, rather than being informed by what the interface currently runs at. I've tried everything that is documented as well as stuff that isn't, but nothing is accepted or recognized. Either no one runs IS-IS on FRR, or much of the implementation is still being developed and/or hasn't been tested in the wild, i.e., no traction. I'm hoping there is someone on this list that has played with IS-IS on FRR to point me in the right direction. The setup is FRR 7.3 on FreeBSD-12.1. Thanks. Mark.

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Command and Control Centres | COVID-19
by Scott E. MacKenzie 06 Apr '20

06 Apr '20

All, This question has arisen and I was wondering if I could request some feedback from the community. We operate a 24x7x365 Command and Control Centre that provides mission critical services (Security Operations, Network Operations, and Enterprise Management) as does many on this list. How many on the list have sent all personnel home using work from home practices and home many have opted to run skeleton crews while implementing tight social distancing restrictions? How many are operating status quo? We are trying to find a balanced position and I was wondering what is the communities position on this topic? Scott

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