Re: home router battery backup

On 1/18/22 22:27, Jordan Hazen wrote: Yes, but separate from their absolute low-voltage cutoff meant to protect battery cells, these hybrid storage products include a user-adjustable reserve setpoint, meant to balance their backup role with grid support and peak-shaving. Yes. In the traditi

Re: What do you think about this airline vs 5G brouhaha?

On 1/19/22 12:28 AM, Masataka Ohta wrote: Digital technology can not be useful when RF stage is saturated, which is why a patent to avoid saturation was essential for CDMA. Completely overloading the receiver frontend will of course render any kind of modulation or coding gain irrelevant, yes

Re: home router battery backup

On 1/18/22 23:17, Joe Maimon wrote: The inverter in question is the one being utilized in conjunction with the powerwall, ats, solar array. All nicely done and reliable and wired in already and with proper capacity. Being able to call for and get more DC power on demand would make this

Re: home router battery backup

On 1/18/22 22:31, Michael Thomas wrote: I have a SolarEdge inverter and they are still working on the software. I don't know if that's true across their product line, but I would think that the software would be pretty portable. SMA on this side. Highly configurable, and you don't even n

Re: What do you think about this airline vs 5G brouhaha?

Brandon Martin wrote: The system apparently also responds poorly to both narrowband and wideband jammers i.e. it does not employ what we'd consider robust, modern error-correction or coding systems or even digital error checking techniques. Digital technology can not be useful when RF stage

Re: What do you think about this airline vs 5G brouhaha?

Jay Hennigan wrote: Radar receivers are typically some form of direct conversion with rather good selectivity, synchronized to the frequency of the transmitted pulse. No. Direct conversion stage has no inherent frequency selectivity and is subject to saturation by noise of any frequency unless

Coverage of the .to internet outage

This piece: https://www.npr.org/2022/01/18/1073863310/an-undersea-cable-fault-could-cut-tonga-from-the-rest-of-the-world-for-weeks drills down to this piece with slightly more detail: https://www.reuters.com/markets/funds/undersea-cable-fault-could-cut-off-tonga-rest-world-weeks-2022-01-18/ I'm

Re: What do you think about this airline vs 5G brouhaha?

On 01/18/2022 20:08, Michael Loftis wrote: Remember that the RA is sub 1W looking for reflected emissions. It’s very possible the ground equipment for a cell base station to have spurious harmonics…where they land requires more RF engineering chops than I’ve got, and would obviously be very sys

Re: What do you think about this airline vs 5G brouhaha?

It appears that Michael Thomas said: > >I really don't know anything about it. It seems really late to be having >this fight now, right? Harold Feld did an excellent explainer about this in November: https://wetmachine.com/tales-of-the-sausage-factory/what-the-eff-faa-my-insanely-long-field-gui

Re: What do you think about this airline vs 5G brouhaha?

Interference with radar altimeters is a serious issue. As a pilot myself, if this fails, you crash with all hands lost. That said, we should be able to eliminate the possibility of any interference. So this shouldn’t be a thing. But also, you don’t f- with radar altimeters. Ms. Lady Benja

Re: What do you think about this airline vs 5G brouhaha?

On Tue, Jan 18, 2022 at 17:49 Jay Hennigan wrote: > On 1/18/22 15:51, Brandon Martin wrote: > > > Further, it seems that good engineering practice was not used in the > > design of these vulnerable systems and that they are subject to > > interference from broad-spectrum "jammers" (i.e. signals t

Re: What do you think about this airline vs 5G brouhaha?

On 01/18/2022 19:48, Jay Hennigan wrote: Intentional broadband jamming isn't going to be very effective against an airplane as the jammer would need to be directly beneath a fast moving target and get the timing exactly right with microsecond accuracy. Just to clarify, I wasn't referring to in

Re: What do you think about this airline vs 5G brouhaha?

On 1/18/22 15:51, Brandon Martin wrote: Further, it seems that good engineering practice was not used in the design of these vulnerable systems and that they are subject to interference from broad-spectrum "jammers" (i.e. signals that, in terms of modulation and timing, don't necessarily corre

Re: What do you think about this airline vs 5G brouhaha?

On 01/18/2022 16:57, Mel Beckman wrote: Bo, it’s the radar altimeter, not the barometric altimeter. This is a radar distance measurement device for determine the precise height above the ground, critical for low-visibility approaches. Where frequency interference is concerned, under FCC rules

Re: What do you think about this airline vs 5G brouhaha?

New to the public eye but not orgs like AOPA who’ve been fighting since 2020 but there not multi billion dollar lobby groups. US is more affected because we have more general aviation, and an older fleet overall. And it’s not cheap to replace these radio altimeters (but that’s kind of like everyth

Re: What do you think about this airline vs 5G brouhaha?

On 1/18/22 5:06 PM, Mel Beckman wrote: Incorrect. Owning spectrum also includes the right to interference-free operation. And you imply that the FAA and airline industry has done nothing, when in reality it’s the FCC who has done nothing. the FAA sponsored extensive engineering tests that demo

Re: What do you think about this airline vs 5G brouhaha?

Except that the FAA isn't claiming interference in their LICENSED band, they are claiming interference OUTSIDE their licensed band. You can't squat on a frequency and then expect the licensed users to accommodate you. Shane On Tue, Jan 18, 2022 at 5:06 PM Mel Beckman wrote: > Shane, > > Incorre

Re: What do you think about this airline vs 5G brouhaha?

On 1/18/22 12:29, Michael Thomas wrote: I really don't know anything about it. It seems really late to be having this fight now, right? From a technical standpoint it seems to me to be a non-issue. There's a 220 MHz guard band. 5G signals top out at 3980 MHz and radar altimeters operate bet

Re: What do you think about this airline vs 5G brouhaha?

Mel Beckman wrote on 18/01/2022 21:25: /The collective tech industry needs to admit that it made a huge blunder when it urged the FCC’s clueless Ajit Pai to “blow off” the clearly demonstrated FAA spectrum conflict. Sorry, passengers, but if you look out your window, you’ll see that aviation ow

Re: What do you think about this airline vs 5G brouhaha?

What I've seen so far from the airline industry is a joke. - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com - Original Message - From: "Mel Beckman" To: sro...@ronan-online.com Cc: nanog@nanog.org Sent: Tuesday,

Re: What do you think about this airline vs 5G brouhaha?

Apples and oranges Michael. The US domestic aviation environment is quite different than even Europe or and especially smaller countries overseas. And how long has 5G been out anyway? I hardly think that’s been available for enough of a safety track record in any country. -mel via cell On Jan

Re: What do you think about this airline vs 5G brouhaha?

Shane, Incorrect. Owning spectrum also includes the right to interference-free operation. And you imply that the FAA and airline industry has done nothing, when in reality it’s the FCC who has done nothing. the FAA sponsored extensive engineering tests that demonstrate the interference is a con

Re: What do you think about this airline vs 5G brouhaha?

The thing is aviation DOESN’T own this spectrum, they just assumed it would always be unused. And they failed to mention it would be a problem during the last 5 years of discussion regarding the use of this spectrum. Shane > On Jan 18, 2022, at 4:25 PM, Mel Beckman wrote: > >  > Michael, >

Re: What do you think about this airline vs 5G brouhaha?

On 1/18/22 1:47 PM, Brandon Martin wrote: On 01/18/2022 16:34, Michael Thomas wrote: Is this the band that has really really short range for 5G? If so, it doesn't seem like a very big deal to give them the airspace on approaches. I mean, if you live under a flight path by the airport, not ge

Re: What do you think about this airline vs 5G brouhaha?

Fearmongering. - Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com - Original Message - From: "Michael Thomas" To: nanog@nanog.org Sent: Tuesday, January 18, 2022 2:29:53 PM Subject: What do you think about this air

Re: What do you think about this airline vs 5G brouhaha?

Brandon, Bo, it’s the radar altimeter, not the barometric altimeter. This is a radar distance measurement device for determine the precise height above the ground, critical for low-visibility approaches. Where frequency interference is concerned, under FCC rules the existing users have prior

Re: What do you think about this airline vs 5G brouhaha?

On 01/18/2022 16:34, Michael Thomas wrote: Is this the band that has really really short range for 5G? If so, it doesn't seem like a very big deal to give them the airspace on approaches. I mean, if you live under a flight path by the airport, not getting fast 5G is hardly your biggest problem.

Re: What do you think about this airline vs 5G brouhaha?

On 01/18/2022 15:29, Michael Thomas wrote: I really don't know anything about it. It seems really late to be having this fight now, right? The issue seems to be old aviation equipment that has poor receiver selectivity on its radio (not radar) altimeter. This is, apparently, a secondary, but

Re: What do you think about this airline vs 5G brouhaha?

On 1/18/22 1:25 PM, Mel Beckman wrote: Michael, Here’s a recent PCmag editorial on the subject, and it seems like many people want to put Internet speed above airline safety: https://www.pcmag.com/news/faa-goes-in-hard-to-kill-mid-band-5g

Re: What do you think about this airline vs 5G brouhaha?

Michael, Here’s a recent PCmag editorial on the subject, and it seems like many people want to put Internet speed above airline safety: https://www.pcmag.com/news/faa-goes-in-hard-to-kill-mid-band-5g

Re: home router battery backup

Mark Tinka wrote: On 1/18/22 18:15, Joe Maimon wrote: Now how about some programming available so you can decide what thresholds and conditions remote start your genny which powers the rectifier which substitutes|augments the solar array? Any half decent battery inverters will be able

Re: home router battery backup

On Thu, Jan 13, 2022 at 10:38:53AM -0500, Jay wrote: > Greetings, > I am a home user. Much of my home has been rewired to run off of > 12-volts D.C. from a large 1200 Amp/Hour LiFePO4 battery bank that is > recharged using Solar. All my lighting, ceiling fans, water pump, Ham > radio gear,

Re: Long hops on international paths

On Tue, Jan 18, 2022 at 6:49 AM PAUL R BARFORD wrote: > So, the question is what is the cost/benefit to providers to > configure/maintain routes (that include long MPLS tunnels) > that tend to concentrate international connectivity at a > relatively small number of routers? Most likely that's not

need commercial connection in elkton, fl

Anyone have coverage on county road 305 in elkton, fl 32033.If so, please contact me off list. -James

Re: home router battery backup

On 1/18/22 12:24 PM, Mark Tinka wrote: On 1/18/22 18:15, Joe Maimon wrote: Now how about some programming available so you can decide what thresholds and conditions remote start your genny which powers the rectifier which substitutes|augments the solar array? Any half decent battery in

What do you think about this airline vs 5G brouhaha?

I really don't know anything about it. It seems really late to be having this fight now, right? Mike

Re: home router battery backup

On Tue, Jan 18, 2022 at 05:11:57PM +0200, Mark Tinka wrote: > > I don't use the Tesla Powerwall, but Li-Ion is generally the same > regardless of who packages it. The difference will be what the OEM > decides to set the low-voltage cut-off to on the inverter and/or BMS. Yes, but separate from t

Re: home router battery backup

On 1/18/22 18:15, Joe Maimon wrote: Now how about some programming available so you can decide what thresholds and conditions remote start your genny which powers the rectifier which substitutes|augments the solar array? Any half decent battery inverters will be able to adequately suppor

Re: home router battery backup

On 1/17/22 3:39 PM, Jordan wrote: One of these, the one originally used for DSL, would always go down for both voice and data when the SLC lost power-- no DC, no dialtone, no DSL, while the other two remained up. Despite several claims of a resolution, this was never properly fixed I never h

Re: Undersea cable damages in the Atlantic?

On Tue, 18 Jan 2022, Andy Ringsmuth wrote: Hmmm… Multiple sub-sea cable problems referencing Europe and the US east coast… Putin testing the waters for connectivity disruptions ahead of a Ukraine invasion? Where the US and NATO are the thorn in his side? Naw, that's Svalbard, Norway cable da

Re: Undersea cable damages in the Atlantic?

> On Jan 18, 2022, at 11:08 AM, Mukund Sivaraman wrote: > > We received the following email today from our upstream (in India): > >> Our transit traffic partners have reported multiple sub-sea cable >> damages on the Atlantic route towards Europe and US east coast. Users >> might face addition

Re: Undersea cable damages in the Atlantic?

Our Singapore routes currently go through France, heh. Start: 2022-01-18T13:32:07-0500 HOST: bom-h01.int.controld.com    Loss%   Snt   Last   Avg  Best Wrst StDev   1.|-- 103.13.115.1   0.0%    10    0.5   2.1   0.3 15.5   4.7   2.|-- 103.149.113.69 0.0%    10    2.1   2.0

Re: Undersea cable damages in the Atlantic?

Are you sure it was about poor routing to Singapore and not poor routing to networks in EU? The reason I ask is that a majority of connectivity has been lost to EU and EU > India is mostly via US > Singapore now. I see high latency on this route for that reason but so far haven't seen packet loss

Re: Undersea cable damages in the Atlantic?

Also FWIW, we've been informed of outages on TGN-EA (since 15/01/22) and IMEWE (since 15/10/21), both "away from the Mumbai coast." No ETR currently available. Rob

Re: Undersea cable damages in the Atlantic?

For what it's worth we have a provider in India for an anycast network who gave us a similar answer when we ticketed them about poor routing to Singapore. Chris On 2022-01-18 9:08 a.m., Mukund Sivaraman wrote: We received the following email today from our upstream (in India): Our transit t

Undersea cable damages in the Atlantic?

We received the following email today from our upstream (in India): > Our transit traffic partners have reported multiple sub-sea cable > damages on the Atlantic route towards Europe and US east coast. Users > might face additional latency and occasional packet loss towards these > destinations. >

Re: home router battery backup

Mark Tinka wrote: On 1/18/22 00:26, Jordan wrote: Wow, that's a nice program. Do you know what they keep the "reserve percentage" set to, the proportion of stored energy that will never be discharged for grid-support, but held back for island-mode use in case of an outage? I don't use t

Re: SOHO IPv6 switches

Brandon Martin writes: > The Netgear GS108T is my typical go-to "not a dumb switch". 8 ports > for about $80. > > Make sure you get the v3 if you want most of the modern IPv6 L2 > features (you also get some very limited L3 capabilities). Extra bonus with the GS108Tv3, and anything else based

Re: SOHO IPv6 switches

The Netgear GS108T is my typical go-to "not a dumb switch". 8 ports for about $80. Make sure you get the v3 if you want most of the modern IPv6 L2 features (you also get some very limited L3 capabilities). The v2 lacks most of them and is still readily available on the market. -- Brandon M

Re: Long hops on international paths

PAUL R BARFORD wrote on 18/01/2022 14:48: So, the question is what is the cost/benefit to providers to configure/maintain routes (that include long MPLS tunnels) that tend to concentrate international connectivity at a relatively small number of routers? the cost of mpls TE is pretty low: a c

Re: Long hops on international paths

On Tue, 18 Jan 2022 at 17:27, Mark Tinka wrote: > > https://ytti.github.io/icmp-eo-timestamp/draft-ytti-intarea-icmp-eo-timestamp.html > I recall you and I chatted about this some 3 or so years ago. Do you > know if anyone of the (un)usual suspects have implemented? I've not even submitted it, s

Re: Long hops on international paths

Thanks Saku and Michael. From: Saku Ytti Sent: Tuesday, January 18, 2022 9:17 AM To: Michael Hare Cc: PAUL R BARFORD ; Esteban Carisimo ; nanog@nanog.org ; Fabian E. Bustamante Subject: Re: Long hops on international paths On Tue, 18 Jan 2022 at 17:14, Michael

Re: Long hops on international paths

On 1/18/22 17:14, Michael Hare via NANOG wrote: Paul- You said: "... would decide to configure MPLS paths between Chicago and distant international locations ..." AS3128 runs MPLS and it's probable someone might correct me here, but for a IGP backbone area I think it's common for there to

Re: Long hops on international paths

On 1/18/22 16:28, Saku Ytti wrote: 2) MPLS-TTL expires in transit 2a) generate TTL exceeded and put it back to tunnel, sending it to egressPE, which is guaranteed to know how to return to sender This is what we run - our core is BGP-free (LDP), so the traceroute value customers see will be

Re: Long hops on international paths

On 1/18/22 16:28, Saku Ytti wrote: 2) MPLS-TTL expires in transit 2a) generate TTL exceeded and put it back to tunnel, sending it to egressPE, which is guaranteed to know how to return to sender This is what we run - our core is BGP-free (LDP), so the traceroute value customers see will

Re: Long hops on international paths

On Tue, 18 Jan 2022 at 17:14, Michael Hare wrote: > AS3128 runs MPLS and it's probable someone might correct me here, but for a > IGP backbone area I think it's common for there to be a full mesh of LSPs via > either LDP, RSVP, SR etc. AS3128 is a small regional and we operate in that > way a

RE: Long hops on international paths

Paul- You said: "... would decide to configure MPLS paths between Chicago and distant international locations ..." AS3128 runs MPLS and it's probable someone might correct me here, but for a IGP backbone area I think it's common for there to be a full mesh of LSPs via either LDP, RSVP, SR etc.

Re: home router battery backup

On 1/18/22 00:26, Jordan wrote: Wow, that's a nice program. Do you know what they keep the "reserve percentage" set to, the proportion of stored energy that will never be discharged for grid-support, but held back for island-mode use in case of an outage? I don't use the Tesla Powerwall, b

Re: Long hops on international paths

Hello David, Understanding the physical topology of the network is not​ our objective. What we're trying to understand is the logical topology revealed by traceroute (we are well-aware of traceroute limitations) and why a relatively small set of routers in different countries tend to have the

Re: Long hops on international paths

Chicago is a fairly major POP that *MAY* very well have waves right to other major POPs. Can you retest from a *not* major POP? They're not likely to have a wave from Indy, St. Louis, Des Moines, etc. going to Paris, Singapore, Helsinki, Budapest, etc. Then you could *maybe* determine if it's

Re: Long hops on international paths

Hey Paul, > Thank you for the summary. We're clear about the fact that what we're seeing > are MLPS paths - that was not in question. What we are not clear about and > the reason for the post is why the provider - zayo.telia in this case - would > decide to configure MPLS paths between Chicag

Re: Long hops on international paths

I think a large part of your problem is that you’re using trace route to try and determine the full topology of a large complex network. It won’t show the full topology. On Mon, Jan 17, 2022 at 7:43 PM PAUL R BARFORD wrote: > What we're considering specifically are consecutive (layer 3) hops as

Re: Long hops on international paths

Hello Saku, Thank you for the summary. We're clear about the fact that what we're seeing are MLPS paths - that was not in question. What we are not clear about and the reason for the post is why the provider - zayo.telia in this case - would decide to configure MPLS paths between Chicago and

Re: home router battery backup

On Thu, Jan 13, 2022 at 02:06:39PM -0800, Michael Thomas wrote: > > For my ISP, they maintain backup power for both DSL and POTS. I > suspect that for a lot of DSL that would hold true because it's > relatively easy for them to power since they already have the > battery backup requirements for PO

Re: home router battery backup

On Thu, Jan 13, 2022 at 10:29:13PM +, John Lightfoot wrote: > > In Vermont I have a Tesla Powerwall that Green Mountain Power > paid for if I agreed to let them manage it. Since then I've > never had an outage of any kind, I usually figure out that there > is one by seeing my neighbors' lights

ODP: SOHO IPv6 switches

Hi Sean, Cisco SG250? Thanks, -- Marcin Gondek / Drixter http://fido.e-utp.net/ AS56662 Od: NANOG w imieniu użytkownika Sean Donelan Wysłane: wtorek, 18 stycznia 2022 12:28 Do: nanog@nanog.org Temat: SOHO IPv6 switches Of course, any ethernet switch is "IPv

Re: SOHO IPv6 switches

On Tue, 18 Jan 2022, Sean Donelan wrote: What's the goto SOHO-class switch for IPv6? Zyxel/Netgear/TP-Link all have switches in the 100-200USD range that can do some basic stuff (filter on ethertype, some DHCPv6/RA inspection, SNMP polling via IPv6 etc). I was surprised by what I found (an

Re: SOHO IPv6 switches

Sean Donelan wrote on 18/01/2022 11:28: The top two capabilities: 1) MLD snooping and 2) a simple way to keep IPv6 off certain ports (i.e. ancient 10/100 devices, which don't like it. controlling the multicast floods may also help them). Most people don't use ipv6 multicast in anger (i.e. anyth

SOHO IPv6 switches

Of course, any ethernet switch is "IPv6 ready." They are just ethernet packets, and the switch doesn't care what's in the packets. Which SOHO class switches are really IPv6 capable? Or is it still necessary to go with the enterprise class switches? IOT devices all want to chat with each