Re: optical circulator as a bidirectional one fiber solution

[Jérôme Nicolle]

Hi Baldur,

Le 07/08/2018 à 21:46, Baldur Norddahl a écrit :
> Would it be possible to use an optical circulator like this one
> (customized to 1310 nm)?
> 
> Has anyone done this? Any reason it would not work?

While it often does work, reflectance is a bitch.

I'd advise you to order some attenuators to plug on RX ports in case the
ghost signal is too high.

Of course, you should use APC connectors all along the optical path.

Also bear in mind that circulators have a narrow spectrum range (likely
1280-1340 in your case, good for 100G-LR4/ER4, but not for 100G-CWDM4)
and are rarely polarization neutral, meaning a DP-QPSK coherent optic
cannot be used.

Best regards,

-- 
Jérôme Nicolle
+33 6 19 31 27 14

Hurricane Lane: Catagory 5 storm forecast to sideswipe Hawaii

[Sean Donelan]

Hurricane warnings have been issued for Hurricane Lane, which strengthened 
to a catagory 5 storm on Tuesday.  The forecast cone of uncertainity shows 
the path sideswiping Hawaii on Thursday.

New AS Number Block allocated to the RIPE NCC

[Ingrid Wijte]

Dear Colleagues,

The RIPE NCC has received the following AS Number Blocks from the IANA 
on 20 August 2018:


207260-208283
208284-209307
209308-210331

You may want to update your records accordingly.

Best regards,

Ingrid Wijte
Registration Services Assistant Manager and Policy Development
RIPE NCC

Pybatfish - Open source network validation SDK

[Ratul Mahajan]

Hey, folks -

Since many of you build and use tools for network validation, I wanted to
share a quick announcement.

We just released Pybatfish , a Python
SDK for Batfish. As you may know, Batfish is an open source framework for
deep (semantic) validation in multi-vendor networks (which we presented at
NANOG65 ).

Pybatfish will make it easy for you to leverage the power of Batfish and to
embed validation in your testing/automation pipeline.

Getting started is easy: Check out the Jupyter notebooks on our github page
(or corresponding videos
), or ping us on
Slack

.

Cheers.

Re: NANOG Digest, Vol 127, Issue 16

[Saymon Araújo]

- PRTG, it's realy easy to configure. Most of the senssors are SNMP of:
traffic/ping/cpu/memory and some senssors for servers like DNS and Radius,
etc.
- Zabbix, there's 2 things that made us use Zabbix, the first one it's
Zabbix Proxy, since the network it's geographical distribuited we need a
tool that provides us monitoring from another places with a low price. And
LLD that i use for monitoring BGP/OSPF sessions and prefix.
- Elastiflow
- For Syslog we use Graylog, that i recomend, it's a excelente tool for
monitoring syslog messages and there's a lot of features such as
extractors, streams and alerts.

I think that PRTG it's kind expensive solution ( if you buy the license ),
but provides a easy way to monitor a lot of things. Just one thing, if your
license expires your are no able to update your software and if you want to
buy the license for upgrade, the days without the license counts as
negative days, i never seen that before, like, if you don't update the
license for 1 year and bought the 3 years lisence, you will got 2 years of
support and upgrade.

Atenciosamente,



Em sex, 17 de ago de 2018 às 09:00,  escreveu:

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> than "Re: Contents of NANOG digest..."
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>
> Today's Topics:
>
>1. Re: What NMS do you use and why? (Nick Peelman)
>2. Re: What NMS do you use and why? (Joe Loiacono)
>3. RE: What NMS do you use and why? (Stan Ouchakov)
>4. Re: What NMS do you use and why? (Nick Peelman)
>5. Re: What NMS do you use and why? (Kushal)
>6. RE: What NMS do you use and why? (Michael Braun (michbrau))
>7. Re: What NMS do you use and why? (Nick W)
>8. Akamia Contact (Romeo Czumbil)
>
>
> --
>
> Message: 1
> Date: Wed, 15 Aug 2018 23:14:32 +
> From: Nick Peelman 
> To: Colton Conor 
> Cc: NANOG 
> Subject: Re: What NMS do you use and why?
> Message-ID: 
> Content-Type: text/plain; charset="Windows-1252"
>
> I think anybody looking for a be-all-end-all solution will find nothing
> but heartburn.
>
> different suites have different strong suits, and deciding you are going
> to pursue one and ignore all others may mean living without a feature or
> set of features you may find really useful or eventually necessary. but
> maintaining multiple complete NMSes isn’t really tenable either.
>
> all of that said, we use a combination of a couple. Nagios/Icinga because
> it’s been around forever (both in the world and in our network), and the
> power of script based checks, being able to write your own handlers and
> pretty much just leverage it as a framework you can shove questions into
> and get regular answers from is invaluable.
>
> LibreNMS gives us the best pretty pictures, letting us monitor much much
> more than just interface traffic, out of the box. much more than cacti is
> capable of without a ton of work (i.e. down to the tx/rx power and
> temperature readings of individual SFPs). it scales relatively well; at
> least in theory. i will be able to tell you for sure later this year as we
> are near the limits of what we can monitor with a single polling device.
> alerting out of Libre into Slack has proven quite fantastic. we can spawn
> threads attached to anything from a BGP peer dropping or a CPU alert as we
> move to triage and solve, even if we are in the field or meetings or
> whatever.
>
> we also still have cacti around for random one-offs. as great as Libre is,
> its poller can be a bit intense for some devices; so in those cases it’s
> safer for us to just have cacti graph the one or two OIDs we need
> specifically, without trolling all the other available sensors.
>
> we ran OpenNMS for a bit, but it proved way to dumb to maintain a large
> (and growing) complex network, without dedicating at least one or two
> people to the care and feeding of it.
>
> -nick
>
> —
> Nick Peelman
> Network Engineer | Enhanced Telecommunications Corp.
> 812-222-0169 | npeel...@etc1.net npeel...@etc1.net> | www.etczone.com
>
> Sent from my iPhone
>
> On Aug 15, 2018, at 09:49, Colton Conor  colton.co...@gmail.com>> wrote:
>
> We are looking for a new network monitoring system. Since there are so
> many operators on this list, I would like to know which NMS do you use and
> why? Is there one that you really like, and others that you hate?
>
> For free options (opensouce), LibreNMS and NetXMS come highly recommended
> by many wireless ISPs on low budgets. However, I am not sure the commercial
> options available nor their price points.
>
>
>
>
> --

Re: Hurricane Lane: Catagory 5 storm forecast to sideswipe Hawaii

[Scott Weeks]

--- s...@donelan.com wrote:
From: Sean Donelan 

Hurricane warnings have been issued for Hurricane 
Lane, which strengthened to a catagory 5 storm on 
Tuesday.  The forecast cone of uncertainity shows 
the path sideswiping Hawaii on Thursday.
---


Yep, this one's closer than the other 2-3 weeks ago.  
I thought about sending another 'dust off your DR 
plan' for those networks doing business in the AP 
region that have stuff here, but if they didn't on 
the last one they wouldn't on this one, either. :-)

It's an M (>110 MPH) until the Big Island on Thur
and then goes down to a regular hurricane Friday
when it hits Maui and Oahu Friday.

http://www.prh.noaa.gov/cphc/tcpages/?product=5day_cone_with_line_and_wind&stormid=EP142018

http://weather.hawaii.edu/satellite/jsanim.cgi?res=4km&chnl=ir&domain=nep&period=720&incr=30&rr=900&banner=uhmet&satplat=goeswest&overlay=off

scott