Re: SRI's Dan Lynch dies

[Eric Litvin]

Dan lynch was our neighbor in Los Altos in the early 2000s.  He was a lovely guy &  became a great friend.   He was a mentor and advisor on a number of ventures over the years and wouldn’t hesitate to offer his guidance when asked.rest in peace old buddy.Eric Litvin Sent from my iPhoneOn Apr 1, 2024, at 6:05 PM, Joe Klein  wrote:Wow, I have not spoken to Dan Lynch in 8 years. He was brilliant!Raise glass for Dan!Joe Klein "inveniet viam, aut faciet" --- Seneca's Hercules Furens (Act II, Scene 1)"I skate to where the puck is going to be, not to where it has been." -- Wayne Gretzky"I never lose. I either win or learn" - Nelson MandelaOn Mon, Apr 1, 2024 at 6:06 PM joe hess  wrote:Thanks for sharing this, too.    Lynch was really underrated for what he did.  He basically made certain that people made their dreams work together, or at least that is what I saw.

Too, when you asked any questions in the Internet’s early days, all the answers eventually seemed to wind back to Dan.   

I only knew him by remote interaction, and I have often felt cheated that I didn’t get to know him better.



> On Apr 1, 2024, at 11:12 AM, Sajit Bhaskaran  wrote:
> 
> RIP Dan Lynch. It is worth adding that he was also the founder of the Interop shows in the mid 80s which achieved a great deal in terms of advancing TCP/IP adoption, and inter-operability testing was a big deal back then when the future of TCP/IP was also not at all certain, as it was in competition then with the ISO/OSI protocol suite. Dan's efforts and passion as an entrepreneur created an exponentially growing community of users and vendors all over the world that made the TCP/IP protocol suite the de facto standard. Thanks very much for sharing. Today we take the Internet for granted. It could have been very different.
> 
> On 3/31/2024 12:19 PM, Jay R. Ashworth wrote:
>> >From Lauren Weinstein @ PRIVACY Digest:
>> 
>> """
>> Dan Lynch, one of the key people involved in building the Internet and
>> ARPANET before it, has died.
>> 
>> Dan was director of computing facilities at SRI International, where
>> ARPANET node #2 was located and he worked on development of TCP/IP, and
>> where the first packets were received from our site at UCLA node #1 to
>> SRI, and later at USC-ISI led the team that made the transition from the
>> original ARPANET NCP protocols to TCP/IP for the Internet. And much more.
>> 
>> Peace. -L
>> """
>> 
>> He was well written up across the web, but here's a 2021 piece for those
>> who aren't as familiar with his background:
>> 
>> https://www.internethalloffame.org/2021/04/19/dan-lynchs-love-brilliant-complexity-fuels-early-internet-development-growth/
>> 
>> And his IHoF induction speech:
>> 
>> http://opentranscripts.org/transcript/dan-lynch-ihof-2019-speech/
>> 
>> I would note his age here, as obits usually do, but it seems unusually difficult
>> to learn.
>> 
>> Happy landings, Mr Lynch.
>> 
>> Cheers,
>> -- jra

Re: Random shower thought: GBIC with LC connector...

[Eric Litvin]

A, Gbics:

If you google ws-g5483, 84, 86, 87 - you’ll see the whole line up. All had sc 
connectors except 83 which was copper rj45 connector. 

Sent from my iPhone

> On Nov 15, 2022, at 8:49 AM, Bjørn Mork  wrote:
> 
> Maybe you're thinking of X2, looking similar to GBIC but even bigger?
> There were converters taking 2 gig SFPs in one X2 slot.
> 
> Don't think either GBIC to SFP or GBIC with LC makes much sense.  The
> alternatives were dirt cheap and easily available by the time these
> could have been products.
> 
> 
> Bjørn
> 
> Matt Erculiani  writes:
> 
>> I feel like I've seen GBIC sleeves that accept SFP modules very similar to
>> QSFP+ CVRs, but I can't seem to find any evidence of these ever existing,
>> so perhaps I'm misremembering.
>> 
>> -Matt
>> 
>>> On Tue, Nov 15, 2022 at 9:23 AM Mel Beckman  wrote:
>>> 
>>> Oh. And it’s not “OCD”. It’s “CDO”, with letters in ascending sequence. :)
>>> 
>>> -mel via cell
>>> 
 On Nov 15, 2022, at 8:18 AM, Mel Beckman  wrote:
 
 No. GBIC stands for Great Big Inserted Cartridge. LC stands for Little
>>> Connector. Thus they are not compatible.
 
 -mel via cell
 
> On Nov 15, 2022, at 7:59 AM, Warren Kumari  wrote:
> 
> 
> Hi there all,
> 
> While looking through my big box of random optics I suddenly realized
>>> that I'd never seen a GBIC with an LC connector, and I started wondering if
>>> anyone else had / if such a thing actually exists.
> 
> Yes, I realize that this would be a fairly niche device - if you
>>> arrived somewhere with a device that took GBICs and there was existing
>>> fiber with LC connectors you could just replace the patch cable or use an
>>> LC-SC convertor, but that doesn't really satisfy my curiosity.
> 
> A quick look through the GBIC MSA / SFF documentation implies that such
>>> a thing *could* probably exist (there is a defined value for the 'LC'
>>> connector), but I wasn't able to actually find any. It might not actually
>>> be compliant with the specs (the document I found only lists SC fiber or
>>> copper (coax with BNC, TNC or DB-9?!)), but that doesn't mean that no-one
>>> made them.
> 
> So, has anyone seen a regular (30mm/1.2") GBIC with LC connectors? And,
>>> if so, "pics or it didn't happen"... :-)
> 
> Obviously I don't have an actual use for this, it's just to satisfy my
>>> (OCD) curiosity...
> W
> 
> 
>>> 

Re: 100GbE beyond 40km

[Eric Litvin]

There’s an eER4 that can do 60km

Sent from my iPhone

> On Sep 24, 2021, at 2:00 PM, Mauricio Rodriguez via NANOG  
> wrote:
> 
> 
> Perhaps a small long-haul OTN platform, supporting FEC, front-ending the JNPR 
> gear?
> 
> https://www.fs.com/c/transponder-muxponder-3390
> 
> Best Regards,
> Mauricio Rodriguez
> Founder / Owner
> Fletnet Network Engineering (www.fletnet.com)
> Follow us on LinkedIn
> 
> mauricio.rodrig...@fletnet.com
> Office: +1 786-309-1082
> Direct: +1 786-309-5493
> 
> 
> 
> 
>> On Fri, Sep 24, 2021 at 4:42 PM Randy Carpenter  wrote:
>> 
>> How is everyone accomplishing 100GbE at farther than 40km distances?
>> 
>> Juniper is saying it can't be done with anything they offer, except for a 
>> single CFP-based line card that is EOL.
>> 
>> There are QSFP "ZR" modules from third parties, but I am hesitant to try 
>> those without there being an equivalent official part.
>> 
>> 
>> The application is an ISP upgrading from Nx10G, where one of their fiber 
>> paths is ~35km and the other is ~60km.
>> 
>> 
>> 
>> thanks,
>> -Randy
> 
> This message (and any associated files) may contain confidential and/or 
> privileged information. If you are not the intended recipient or authorized 
> to receive this for the intended recipient, you must not use, copy, disclose 
> or take any action based on this message or any information herein. If you 
> have received this message in error, please advise the sender immediately by 
> sending a reply e-mail and delete this message. Thank you for your 
> cooperation.

Re: Broken Mini-SAS cable removal?

[Eric Litvin]

Joe’s response is spot on. I would also suggest you look at the “latching 
finger” mechanism on a spare,  then apply some of the techniques Joe suggests. 

Eric 
Luma optics 


 

Sent from my iPhone

> On Apr 23, 2021, at 8:27 AM, Joe Klein  wrote:
> 
> Try shim stock or a feeler gauge between the plug and socket to work the 
> latching fingers. This isn't something that I've tried specifically in this 
> case. 
> 
> You might need to put a notch in the stock or feeler gauge so that you can 
> work the fingers from the backside. Kinda like that old trick of using a 
> credit card to prise a door latch, except this should work since there's no 
> deadlatch. :)
> 
> You might also try gently twisting a small screwdriver or spudger stick 
> between the plug and socket too to increase the gap between the socket and 
> plug. 
> 
> -joe
> 
> From: NANOG  On Behalf Of 
> Ryland Kremeier
> Sent: Friday, April 23, 2021 09:31
> To: nanog@nanog.org
> Subject: Broken Mini-SAS cable removal?
> 
>  
>  External Mail
>  
> Anyone here have experience removing a mini-SAS cable when the plastic tab 
> has broken off? Tried checking online but couldn't find anything.
> 
> Thank you,
> -- Ryland
> 

Re: Florida: Voter registration website overwhelmed at deadline

[Eric Litvin]

This is a great F’in email,  Sean!  

Sent from my iPhone

> On Oct 7, 2020, at 10:10 PM, Constantine A. Murenin  
> wrote:
> 
> On 06/10/2020, Sean Donelan  wrote:
>> 
>> Florida has had notoriously unreliable state I.T. infrastructure for
>> years. Florida's unemployment websites were broken for months during the
>> Spring 2020 COVID unemployment demand surge.  So its very likely crappy
>> state I.T. infrastructure problems being stressed by high volume.
>> 
>> 
>> Florida voting age population (2016): 15,839,713
>> Florida registered voters (2016): 12,863,773
>> Florida registered voters (2019): 13,536,830
>> 
>> Florida Secretary of State Laurel Lee, who oversees the voting system,
>> said the online registration system “was accessed by an unprecedented 1.1
>> million requests per hour” during the last few hours of Monday.
> 
> People act like 1.1 million requests per hour is a huge number.
> 
> That's only 305 requests per second!
> 
> Cheapest NVMe SSDs are capable of 160k+ IOPS.
> 
> You can literally serve the whole thing from a single server on a
> 100Mbps line, if you design it properly, and don't waste bandwidth on
> stock images and silly front-ends.
> 
> Add a T1 to do replication on the side to an off-site location.
> 
> 100 Mbit/s / 305 req/s = 40 KiloBytes/req -- should be enough to
> display/process any form; and you can even get higher speeds on a 5G
> mobile phone these days;
> 
> 1.5 Mbit/s / 305 req/s = 0.6 KByte/req -- should be enough to
> replicate each registration; and why are we even talking about T1 in
> 2020?!
> 
> Keep in mind that 1Gbps (e.g., 1000Mbit/s) is pretty much a minimum
> these days, so, you'd either have plenty of extra room to spare, or
> can do way more than an average of 1.1 million requests per hour.  A
> Google search reveals you can even get 10 Gbps transit for only
> $900/mo from he.net these days, for example.
> 
> P.S. At least here you may have to collect and distribute unique
> information to each visitor; but what excuse did PG had in 2019 when
> they couldn't distribute non-unique information about the preemptive
> power shutoffs that they've had about one year ago now?!
> 
> What I'm always curious about, is how many servers do they actually
> have, and just how unreasonable do their numbers look when you lay it
> all out.  You'd think paying a few mils to design the system could
> actually make it work properly when the time comes.  Or are they
> somehow not aware that they have 16M voters, everyone always doing
> everything in the last minute?!
> 
> C.

Redhat contact

[Eric Litvin]

Hi,  I need to get in contact with someone in the sales team at Redhat but they 
are not replying either to my emails or phone calls. Do you know anyone working 
for Redhat whom we can call? Please dm me. 

Thanks

Eric  Sent from my iPhone

> On Sep 18, 2020, at 7:48 AM, Wilco Baan Hofman  wrote:
> 
> 
> 
>> On 18/09/2020 12:07, Mark Tinka wrote:
>> 
>> 
>> There was a time when the use-case for MACSec was to move banks away
>> from running their own DWDM/FC networks, and letting operators do it.
>> 
> 
> Well, the other use case is access networks with 802.1x. With 802.1x as
> long as the port stays up the session cookie (whatever is set as
> authenticated) is the MAC address. So once a port is authenticated, it's
> really easy to spoof a MAC and still be on the network.
> 
> With WPA2 enterprise on WiFi, this problem does not exist, because then
> there is a cryptographic session. MACsec fixes that gap on wired.
> 
> Not all that relevant for long-distance links though :)
> 
> -- Wilco

Re: Outsourced NOC Solutions

[Eric Litvin]

> Hello, Luma Systems has built a SaaS-based optical monitoring platform
> enabling vendor-neutral DWDM Channel Monitoring and In-Service OTDR with a
> robust predictive analytics engine.  We've met with many Nanogers over the
> last couple years but if you're interested in learning more,  please
> contact us offline.
>
> Eric
> Luma Systems
>
> On Mon, Jun 8, 2020 at 11:47 AM Roel Parijs  wrote:
>
>> Hello,
>>
>> Yes, you can install a permanent OTDR meter on the fiber.
>>
>> Exfo used to have them but a very cost effective solution which we have
>> been selling for years is the Adva ALM.
>> https://www.adva.com/en/products/network-infrastructure-assurance/alm
>> You can even monitor the actual customer fiber, since it uses wavelength
>> 1650nm which does not interfere with Grey / CWDM / DWDM signals.
>> Up to 64 fibers per unit, with a maximum distance of 160km and it can
>> even monitor PON networks behind the splitters.
>> The best part for troubleshooting is that it integrates with existing GIS
>> systems which show you the location of the suspected cut on a map.
>>
>> Regards
>> Roel
>>
>> On Mon, Jun 8, 2020 at 8:25 PM Rod Beck 
>> wrote:
>>
>>> Hi,
>>>
>>> My colleague and I may be running a new dark fiber network in the
>>> Northeast.
>>>
>>> We need an outsourced NOC to monitor for fiber cuts and serve as a
>>> contact point for customers.
>>>
>>> Am I wrong in believing that there should be a way of lighting a single
>>> pair in the cable and then monitoring it for signal disruption? It is not a
>>> perfect solution, but arguably better than learning that the cable has been
>>> damaged from an irate customer.
>>>
>>> Best to take any replies off the message board.
>>>
>>> Thanks.
>>>
>>> Regards,
>>>
>>> Roderick.
>>>
>>>
>>>
>>> Roderick Beck
>>> VP of Business Development
>>>
>>> United Cable Company
>>>
>>> www.unitedcablecompany.com
>>>
>>> New York City & Budapest
>>>
>>> rod.b...@unitedcablecompany.com
>>>
>>> Budapest: 36-70-605-5144
>>>
>>> NJ: 908-452-8183
>>>
>>>
>>> [image: 1467221477350_image005.png]
>>>
>>

-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

Outsourced NOC Solutions

[Eric Litvin]

Hello,

Luma Systems has built a SaaS-based optical monitoring platform enabling
vendor-neutral DWDM Channel Monitoring and In-Service OTDR with a robust
predictive analytics engine.  We've met with many Nanogers over the last
couple years but if you're interested in learning more,  please contact us
offline.

Eric
Luma Systems

On Mon, Jun 8, 2020 at 11:47 AM Roel Parijs  wrote:

> Hello,
>
> Yes, you can install a permanent OTDR meter on the fiber.
>
> Exfo used to have them but a very cost effective solution which we have
> been selling for years is the Adva ALM.
> https://www.adva.com/en/products/network-infrastructure-assurance/alm
> You can even monitor the actual customer fiber, since it uses wavelength
> 1650nm which does not interfere with Grey / CWDM / DWDM signals.
> Up to 64 fibers per unit, with a maximum distance of 160km and it can even
> monitor PON networks behind the splitters.
> The best part for troubleshooting is that it integrates with existing GIS
> systems which show you the location of the suspected cut on a map.
>
> Regards
> Roel
>
> On Mon, Jun 8, 2020 at 8:25 PM Rod Beck 
> wrote:
>
>> Hi,
>>
>> My colleague and I may be running a new dark fiber network in the
>> Northeast.
>>
>> We need an outsourced NOC to monitor for fiber cuts and serve as a
>> contact point for customers.
>>
>> Am I wrong in believing that there should be a way of lighting a single
>> pair in the cable and then monitoring it for signal disruption? It is not a
>> perfect solution, but arguably better than learning that the cable has been
>> damaged from an irate customer.
>>
>> Best to take any replies off the message board.
>>
>> Thanks.
>>
>> Regards,
>>
>> Roderick.
>>
>>
>>
>> Roderick Beck
>> VP of Business Development
>>
>> United Cable Company
>>
>> www.unitedcablecompany.com
>>
>> New York City & Budapest
>>
>> rod.b...@unitedcablecompany.com
>>
>> Budapest: 36-70-605-5144
>>
>> NJ: 908-452-8183
>>
>>
>> [image: 1467221477350_image005.png]
>>
>

Re: Oracle DBA

[Eric Litvin]

Sorry folks. I realized apres-deed that  my DBA post was off-topic.
Apologies.

On Wed, Mar 13, 2019 at 4:45 PM Eric Tykwinski 
wrote:

>
> On Mar 13, 2019, at 7:12 PM, Ross Tajvar  wrote:
>
> This is totally off-topic.
>
>
> Yes and no.  Probably the wrong list:
> https://mailman.nanog.org/mailman/listinfo/jobs
> I think it’s a great idea to ask for/seek human resources, since they
> probably can be more cost effective than vendors at times.
>
> That’s it’s in a DBA field, well that’s sort of off topic, but I’m sure we
> all know people in the field so it’s probably not the one’s reading it, but
> it can be forwarded.
>
>

-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

Oracle DBA

[Eric Litvin]

We currently have Oracle 10g Ent Edition and running into Index and log space 
issues.  Looking for an   Oracle DBA  we can hire for a day or so to help us 
cleanup and increase the space issue?

This is in Sunnyvale area. 
 
Info:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
PL/SQL Release 10.2.0.3.0 - Production
"CORE10.2.0.3.0Production"
TNS for Linux: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
 
Please contact me offlist with recommendations. 

Cheers

Eric

Re: 3rd party QSFP-100G-LR4-S for Cisco

[Eric Litvin]

Hi Ryugo, 

I’m Eric Litvin, CEO of Luma Optics. We sell 1000s of 100G LR4.  Our price is 
$800.00 ( yes it’s true $800.00 for 100G-LR4).  We can do this because we buy 
1000s of LR4 at a time and do big volumes. Ours are open eeprom and we provide 
a device for free that enables you to flash the firmware and turn up the part 
in any network environment.  I’ve been a Nanog member for a long time and have 
many member references if you’d like to consider us. 

Cheers, 

Eric Litvin

Sent from my iPhone

> On May 29, 2018, at 5:48 AM, Ryugo Kikuchi  wrote:
> 
> Hey all,
> 
> Does anyone have a recommended model of 3rd party's "QSFP-100G-LR4-S" for
> Cisco ASR and Nexus?
> 
> Cisco's original 100G SFP costs us an arm and a leg, so we want to try to
> use 3rd party 100g SFP.
> But we are not sure which manufacturer's SFP is reliable or has good
> performance.
> 
> Does anyone have experience?
> 
> Many thanks,
> 
> Roy

Re: Suggestion for Layer 3, all SFP+ switches

[Eric Litvin]

Brocade/arris is eager for business these days. They have a nice switch  (10g 
ports with 40g stacking) that should meet your needs with very aggressive 
pricing. 

Eric



Sent from my iPhone

> On Apr 18, 2018, at 5:26 AM, Giuseppe Spanò - Datacast Srl 
>  wrote:
> 
> Hello,
> 
> we're looking for some L3 switches to be used as distribution devices. They 
> should have all (at leaast 24) SFP+ ports 10G and at least a couple of 
> upstream ports 40G capable, but what is most important, they should be able 
> to run MPLS, EoMPLS and VPLS. Is there any device you would suggest us? We 
> where thinking about NEXUS but I'm sure there are also others, even if it is 
> not so easy to find them on the Internet.
> 
> Thank you in advance for your help .
> 
> Giuseppe Spanò
> Datacast Srl

Re: Brocade unsupported transceiver?

[Eric Litvin]

You need to program the passive dac to look like an active dac. Brocade wants 
active.

Ping me if you want help.

Eric 

Sent from my iPhone

> On Mar 21, 2018, at 3:36 PM, Mike Hammett  wrote:
> 
> No one knows of such a command and apparently the VDX line is finicky with 
> what passive DACs they'll work with. I just ordered more of the ones I know 
> that work. 
> 
> 
> Tangent: Is it normal for these guys to still transmit light even when the 
> interface is shut? 
> 
> 
> 
> 
> - 
> Mike Hammett 
> Intelligent Computing Solutions 
> http://www.ics-il.com 
> 
> Midwest-IX 
> http://www.midwest-ix.com 
> 
> - Original Message -
> 
> From: "Mike Hammett"  
> To: "NANOG list"  
> Sent: Wednesday, March 21, 2018 3:18:28 PM 
> Subject: Brocade unsupported transceiver? 
> 
> Anyone know if there is a command in Brocade NOS (4.x) to force the use of an 
> unsupported transceiver? If so, what is it? 
> 
> 
> 
> 
> - 
> Mike Hammett 
> Intelligent Computing Solutions 
> http://www.ics-il.com 
> 
> Midwest-IX 
> http://www.midwest-ix.com 
> 

Re: Arista unqualified SFP

[Eric Litvin]

Let me know if you want samples. We can ship today.

> On Aug 17, 2016, at 12:50 PM, Stanislaw  wrote:
> 
> Hi all,
> Is there a way for unlocking off-brand transceivers usage on Arista switches?
> 
> I've got an Arista 7050QX switch with 4.14 EOS version. Then it has been 
> found out that Arista switches seem to not have possibility to unlock 
> off-brand xcievers usage (by some service command or so).
> 
> I've patched /usr/lib/python2.7/site-packages/XcvrAgent.py, made the checking 
> function bypass the actual check and it helped: ports are not in errdisable 
> state anymore. But despite of xceivers are detected correctly, links aren't 
> coming up (they are in notconnect state).
> 
> If anyone possibly have does have a sacred knowledge of bringing off-branded 
> transceivers to life on Arista switches, your help'd be very appreciated. 
> Thanks.

Re: 10G tester recommendation

[Eric Litvin]

Yes Darrell   We have a 19" rackmount 1U optical channel monitoring.  Unit 
plugs into the monitor port of the Mux and enables DWDM Channel Monitoring - 
i.e power levels and OSNR.  It can be accessed remotely over SNMP. 

Regards,

Eric Litvin
650 996 7270
e...@lumaoptics.net
PROGRAMMABLE SFP XFP QSFP CFP



> On Mar 21, 2016, at 8:04 AM, Darrell Budic <bu...@onholyground.com> wrote:
> 
> Eric, saw this on the NANOG lists, figured I’d ask. I’m looking for a device 
> to set on the monitor port of a DWDM mux and provide statistics over an 
> attached network interface via SNMP or cli. Do you have such a product, or 
> know of one?
> 
> Thanks!
> 
>  -Darrell
> 
> 
>> On Mar 20, 2016, at 3:38 PM, Eric Litvin <e...@lumaoptics.net> wrote:
>> 
>> Manuel- my company, luma optics,  has a handheld  to offer at a very 
>> affordable price relative to the big brands. It would be my pleasure to 
>> follow up with you to discuss further.
>> 
>> Regards
>> 
>> Eric Litvin
>> 650 996 7270
>> e...@lumaoptics.net
>> PROGRAMMABLE SFP XFP QSFP CFP & Optical Test Equipment
>> 
>> 
>> 
>>> On Mar 20, 2016, at 11:58 AM, Manuel Marín <m...@transtelco.net> wrote:
>>> 
>>> Hi Nanog community
>>> 
>>> 
>>> We are looking 10G testers for BER and RFC2544 tests and I was wondering if
>>> additional to the JDSU/Viavi, is there something else that you can
>>> recommend like Exfo, Fluke, etc?
>>> 
>>> Your input will be appreciate it
>>> 
>>> Thank you and have a great day
> 

Re: 10G tester recommendation

[Eric Litvin]

Manuel- my company, luma optics,  has a handheld  to offer at a very affordable 
price relative to the big brands. It would be my pleasure to follow up with you 
to discuss further.

Regards

Eric Litvin
650 996 7270
e...@lumaoptics.net
PROGRAMMABLE SFP XFP QSFP CFP & Optical Test Equipment



> On Mar 20, 2016, at 11:58 AM, Manuel Marín <m...@transtelco.net> wrote:
> 
> Hi Nanog community
> 
> 
> We are looking 10G testers for BER and RFC2544 tests and I was wondering if
> additional to the JDSU/Viavi, is there something else that you can
> recommend like Exfo, Fluke, etc?
> 
> Your input will be appreciate it
> 
> Thank you and have a great day

Re: [Attendee] Running

[Eric Litvin]

I'm thinking about a 4 or 5 pm tomorrow,  then early am tues and weds.  If the 
harbor run is too drab, I hear sunset cliffs is a great place for a trail run 
(10km).  

Eric 

Sent from my iPhone

> On Feb 7, 2016, at 6:27 PM, Peter Thimmesch  
> wrote:
> 
> 
> 
> Regards,
> 
> Peter
> 
> On Feb 7, 2016, at 6:25 PM, Castillo, Elliott 
>  wrote:
> 
>> I'm in. Say when.
>> 
>> Sent from my iPhone
>> 
>> On Feb 7, 2016, at 5:27 PM, Nico CARTRON  wrote:
>> 
>>> Hello fellow NANOGers,
>>> 
>>> I bet there must be some runners over here - I just ran this morning and 
>>> the route from the Marina to downtown San Diego is really nice,
>>> so was wondering if there were folks who’d like to run one of the 3 next 
>>> (early) mornings?
>>> 
>>> 
>>> Cheers, 
>>> 
>>> -- 
>>> Nico CARTRON
>>> EfficientIP
>>> Mobile: +33.6.45.45.91.98
>>> ___
>>> Attendee mailing list
>>> atten...@mailman.nanog.org
>>> http://mailman.nanog.org/mailman/listinfo/attendee
>> ___
>> Attendee mailing list
>> atten...@mailman.nanog.org
>> http://mailman.nanog.org/mailman/listinfo/attendee
> ___
> Attendee mailing list
> atten...@mailman.nanog.org
> http://mailman.nanog.org/mailman/listinfo/attendee

Re: Arista optics

[Eric Litvin]

Luma Optics  has Arista Compatibles available.  Please bear in mind some 
versions of Arista OS do not accept compatibles.  We are happy to discuss our 
findings with you.

Eric
Luma Optics
650 996 7270 



Sent from my iPhone

> On Jan 20, 2016, at 8:39 AM, Alex Forster  wrote:
> 
> Hi everyone!
> 
> I'm trying to get buy-in to go with Arista for some new infrastructure, but 
> the Arista optics just aren't in the ballpark for us at "proof-of-concept" 
> volume. In Cisco-land, we've had great success using Finisar optics, and 
> they've been an easy "sell" to management since many Cisco optics are just 
> rebranded Finisar's.
> 
> The relevant Arista optics I'm looking at are QSFP-100G-LR4 and SFP-10G-LR. 
> Does anybody know what supplier(s) manufacture these optics for Arista? 
> Alternatively, does anyone have any experience using third-party comparable 
> optics (especially the 100G) in the battlefield?
> 
> Since optics sales are pretty cut-throat, I do ask that you disclose if you 
> have a financial interest in any of your suggestions.
> 
> Thanks!
> 
> Alex Forster

Re: Programmable SFP+ Transcievers

[Eric Litvin]

Luma Optics in California has re-progammable transceivers along with a
coding platform called CLOUDCODE.

In addition to re-programming, the tool can also be used for DWDM tuning.

Eric
Luma Optics

On Mon, Jan 18, 2016 at 11:02 AM, Colton Conor <colton.co...@gmail.com>
wrote:

> What options are out there for re-programmable SFP and SFP+ transceivers?
> So far I have found both
> https://www.flexoptix.net/en/flexbox-v3-transceiver-programmer.html and
>
> http://solid-optics.com/tools/multi-fiber-tool/so-multi-fiber-tool-id1768.html
> Is there anything else out there? Any opinions on these two companies?
>
>
> I believe they both require you to use their SFPs in order to program them,
> but I could be wrong.
>



-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

Re: Tunable SFP

[Eric Litvin]

Dwdm tunable 10G can run at 1G with rate select. 

Sent from my iPhone

 On Jun 7, 2015, at 2:15 PM, Tony Wicks t...@wicks.co.nz wrote:
 
 I don't quite see why you would want to use a tuneable 1G optic now days. 
 Generally people use coloured optics to either increase the capacity they can 
 push down a Dark Fibre or to interconnect with a DWDM OTN. In days past using 
 different wavelengths for traffic separation would be not unheard of but in 
 today's world there are many better ways of doing that. The use of tuneable 
 optics reduces sparing and complexity but it is a very difficult and 
 expensive manufacturing task and I can understand why no manufacturer would 
 bother with 1G as that seems like a very small market. If you really want 1G 
 there are plenty of CWDM fixed optics available. If you need more capacity, 
 well really 10G is not at all expensive now days. If you want traffic 
 separation then use MPLS. If you have old 1G only switches, well, you know 
 the answer to that.
 
 My 2c
 
 
 -Original Message-
 Hi,
 
 I believe nobody actually answered the original question: is there any 
 tunable SFP module available. Notice the lack of a + in that statement. The 
 datasheets for modules cited in this thread are all 10G modules with minimum 
 speed of 8.5G. Nothing that will work at 1G.
 

Re: Tunable SFP

[Eric Litvin]

Hi Frank - we have DWDM SFP TUNABLES - stateside. They are both tunable and 
reconfigurable. 

Eric Litvin
Luma Optics
650 996 7270

Sent from my iPhone

 On Jun 6, 2015, at 12:16 PM, Frank Bulk frnk...@iname.com wrote:
 
 Upon second look, these are reconfigurable.  Doesn't appear to be the same
 as tunable. =(
 
 Frank
 
 -Original Message-
 From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Frank Bulk
 Sent: Saturday, June 06, 2015 2:07 PM
 To: nanog@nanog.org
 Subject: RE: Tunable SFP
 
 Thanks, that's very helpful.  They have several models there:
 https://www.flexoptix.net/en/produkte/transceiver.html?fo_tra_formfactor=sfp
 #fo_tra_formfactor=sfpfo_tra_interface=05_dwdm_100ghzgan_data=true
 
 Frank
 
 -Original Message-
 Sent: Saturday, June 06, 2015 1:44 PM
 To: Frank Bulk
 Subject: Re: Tunable SFP
 
 Check out https://www.flexoptix.net/en/
 
 This topic came up last month and a lot of people recommended this 
 vendor.  Hope it helps.
 
 On 6/6/2015 10:45 AM, Frank Bulk wrote:
 Thanks -- can you point me to any suppliers?
 
 Frank
 
 -Original Message-
 From: Jared Mauch [mailto:ja...@puck.nether.net]
 Sent: Saturday, June 06, 2015 12:41 PM
 To: Frank Bulk
 Cc: nanog@nanog.org
 Subject: Re: Tunable SFP
 
 They do exist. They tend to have tighter link budgets as compared to XFP
 tunable optics. Don't expect to go as far due to the receiver sensitivity.
 
 Jared Mauch
 
 On Jun 6, 2015, at 1:29 PM, Frank Bulk frnk...@iname.com wrote:
 
 Anyone know if tunable SFPs exist?  I've googled around on this, but only
 found fixed wave-length SFPs.
 
 Or of a tunable SFP+ that can operate in SFP port as 1G?
 
 Frank
 
 
 

Re: SFP Programmers

[Eric Litvin]

Lumaoptics.com in Northern California has them too.

On Sun, Mar 22, 2015 at 10:24 AM, Mark Tinka mark.ti...@seacom.mu wrote:



 On 22/Mar/15 17:35, Mike Hammett wrote:

 Where are you guys picking up your SFP programmers?


 FlexOptics are good.

 Mark.




-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

Re: MultiMode Fiber Connectivity... (850nm) Power Question

[Eric Litvin]

Faisal,

You don't need to worry about power range when connecting SR or LR.
However, an ER or ZR on a loopback can damage Rx. The strength of the
receiving signal is always under the tolerance allowed. The 850nm Light is
attenuated very quickly because of the MMF and the 850nm light source. This
light source is more like an LED than a Laser.  The MTTF on any transceiver
is 50,000 hours at room temperature. A bigger factor is high temperature,
because the chip is a semiconductor.


Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

On Wed, Feb 11, 2015 at 12:48 PM, Faisal Imtiaz fai...@snappytelecom.net
wrote:

 Hello,

 I was looking for feedback on the following question:-

 When connecting two MM SFP/SFP+/XFP 's together...(short range).

 What should be the best practice receive power range ?

 Is it true that if the rx power is higher than (x?) then it shortens the
 life of the optics ?
 (assumption being made here is that MAX Rx Power is not being exceed as
 per the spec sheets of the optics)

 Regards

 Faisal Imtiaz
 Snappy Internet  Telecom
 7266 SW 48 Street
 Miami, FL 33155
 Tel: 305 663 5518 x 232

 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net




-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270 650%29996-7270*
Fax: (650) 618-1870

Re: Cisco CCNA Training (Udemy Discounted Training)

[Eric Litvin]

have some juniper but not cisco.

On Thu, Dec 4, 2014 at 12:08 PM, Bacon Zombie baconzom...@gmail.com wrote:

 Anybody got codes valid for December?
 On 14 Nov 2014 18:07, Wakefield, Thad M. twakefi...@stcloudstate.edu
 wrote:

  Since there was some interest in the Udemy CCNA training, I'll risk
  forwarding these additional discounts:
 
  Remember that this is ONLY for the month of NOVEMBER!
  *** CCNA Course is now $24 with coupon code: THANKS24
 
 https://www.udemy.com/the-complete-ccna-200-120-course/?couponCode=THANKS24
  *** ROUTING Course is now $14 with coupon code: THANKS14
 
 
 https://www.udemy.com/routing-configuration-router-administration/?couponCode=THANKS14
  *** SWITCHING Course is now $9 with coupon code: THANKS9
  https://www.udemy.com/layer-2-switching-vlans/?couponCode=THANKS9
  *** IPv4 Course is now $9 with coupon code: THANKS9
 
 
 https://www.udemy.com/everything-you-need-to-know-about-ipv4-and-its-configuration/?couponCode=THANKS9
  *** IPv6 Course is now $9 with coupon code: THANKS9
  https://www.udemy.com/the_abcs_of_ipv6/?couponCode=THANKS9
  *** VLANs Course is now $5 with coupon code: THANKS5
 
 
 https://www.udemy.com/overview-of-vlans-access-list-nat-bonus-material/?couponCode=THANKS5
  *** OSPF Course is now $14 with coupon code: THANKS14
  https://www.udemy.com/ospf-breakdown/?couponCode=THANKS14
  *** HEX Course is FREE *** use coupon code: THANKSFREE
 
 
 https://www.udemy.com/learn-how-to-do-hex-conversions-in-under-30-seconds/?couponCode=THANKSFREE
 
 




-- 

Eric Litvin

President

e...@lumaoptics.net
Direct: (650)440-4382

Mobile:(*650)996-7270*
Fax: (650) 618-1870

Re: Pad 1310nm cross-connects?

[Eric Litvin]

Hi Chris,

I'm with an optics vendor, Luma optics. All our optics are field programmable 
to work in any intended network environment. Regarding your question, its  
unnecessary to pad a 10km LR, even with such a short reach ( 20m) .  If it were 
an ER or ZR, it would be a different story. 
Good luck with you project. 

Regards, 

Eric Litvin
LumaOptics.net
650 996 7270

Sent from my iPhone

 On Oct 19, 2013, at 7:33 PM, Chris Costa ccosta92...@gmail.com wrote:
 
 What are the opinions/views on attenuating short, 1310nm LR cross-connects.
 Assume  20m cable length and utilizing the same vendor optics on each
 side of the link.  Considering the LR transmit spec doesn't exceed the
 receiver's high threshold value do you pad the receiver closer to the
 median RX range to avoid potential receiver burnout over time, or just
 leave it un-padded?
 
 Thanks