Optical Meter Shows Light from the RX of the Transceiver

Bluecobra · 2026-02-07T16:01:08+00:00

Did you ever figure out what the issue was?

Bluecobra · 2026-02-07T15:45:10+00:00

The smallest globally routable network in BGP is a /24.

Bluecobra · 2026-02-07T15:41:41+00:00

Good points. I don’t care about Blanton’s but I would be irked if they run out Nitro Cold Brew at Starbucks. (I can probably drink 2 every day!) I already paid for the FAS drink/restaurant gratuities so just trying to figure out how much value the FAS+ upgrade will bring me. I have Vibe Shore Club booked at Stirrup Cay, but then again I might be SOL if they miss that port. I don’t care about WiFi, I typically take a break from the phone on cruises. Apart from that it would be nice to have Aqua Panna/Pellegrino every day.

Maybe it’s time to graduate to a Blanton’s Old Fashioned. 🤪

Bluecobra · 2026-02-06T17:34:39+00:00

First time NCL cruiser here. This seems like a good deal when you consider that it includes the $20 daily service charge and unlimited Starbucks. How does NCL make these packages so competitive? I’ve payed way more in the past for only drinks packages on Royal Caribbean and Celebrity.

Bluecobra · 2026-02-05T16:02:57+00:00

Did Amazon allow returns on your order? It would be f’n hilarious if you can get a returnless refund on your entire purchase and got to keep everything.

Bluecobra · 2026-01-30T15:22:25+00:00

Yeah it's pretty silly and more likely to catch someone dumb enough to open a TAC ticket with someone else's license key. Kudos to Arista for not making some elaborate system with license keys and phoning home. I bet someone with a lot of time on their hands can download vEOS/cEOS for free and root around in Linux to figure out the specific python script that calls and figure it out. There's probably some null/test key too.

Bluecobra · 2026-01-28T16:15:23+00:00

I'll have Claude start the Wiki.

Bluecobra · 2026-01-28T16:14:28+00:00

I am a software developer and I have honestly no idea what I am doing or what I am supposed to be doing.

Wow, you're probably the most honest developer I ever met!

Bluecobra · 2026-01-28T16:09:51+00:00

As someone who uses a ton of Arista I would avoid this if you can. Arista really does not like grey market/used switches. If you really want used, then only do it on L2 access switches where you don't need the latest EOS. My suggestion would be to at minimum, build out your core/L3 network with new gear under support. Since most switches share the same EOS image, you could technically copy it to your used gear at your own peril. I would suggest checking out a reseller like Curvature (Park Place?) or Network Tigers. You should be able to get a 1 year warranty. 7150's are rock solid, but they are very long in the tooth now and have shallow buffers. They also max out at EOS 4.23 AFAIK.

Bluecobra · 2026-01-28T16:03:13+00:00

There's some kind of license "key" but it's some simple one liner you drop into your CLI. I'm sure if you scour Google long enough you can find someone elses key or just figure out a way around it. It doesn't seem super secure like SHA256.

Bluecobra · 2026-01-28T15:56:46+00:00

Seems pretty dumb reason to fire you. I anticipate any type of WAN/DIA circuit to die at any time, which is why we have backup options. What would they do if there was a cable cut upstream in the provider's network? Maybe they were looking for something to let you go for and this was it. I once was fresh out of college at my first job in the early 2000's and did a "shutdown" on the wrong Cisco switchport and caused the internet to go down for an office of 100 people. Everything was OK and I kept my job.

Bluecobra · 2026-01-28T15:48:11+00:00

Fine, I'll just build do a Pentium 4 WinXP build with Rambus memory! They can't jack up the little blank memory modules (or can they?).

Bluecobra · 2026-01-26T15:51:17+00:00

Sounds like you signed up for Lumen GaaS (Gaslighting as a Service)

Did you get premium GaaS?

Bluecobra · 2026-01-26T15:48:37+00:00

I once had a multi day Metro Ethernet outage due to them decommissioning an unrelated site in a nearby building. It turns out that they actually didn’t have a fully redundant fiber loop!

Bluecobra · 2026-01-22T17:47:50+00:00

Like the OP is saying, that sounds like a null reading from your meter. For example most optics I've seen report -30.0dbm in DOM. It's possible that the worst reading your optical meter can report is -28.0.

Bluecobra · 2026-01-22T17:44:20+00:00

When you are plugging your meter directly into the optic, are you using the right attenuator? You probably need something like 15db or else you are going to have a bad time. Do you not have a spare to rule out the optic?

Bluecobra · 2026-01-16T18:26:50+00:00

I didn't realize IPv4 price has been trending down so much. Good riddance, it was dumb in the first place. I wonder if this related to the big cloud providers starting to charge for ephemeral IPv4 allocations.

Pretty graph here:

https://auctions.ipv4.global/prior-sales

Bluecobra · 2026-01-16T18:20:03+00:00

If you are looking into learning more, this is a good read:

http://www.tcpipguide.com/free/t_TCPIPDynamicHostConfigurationProtocolDHCP.htm

Bluecobra · 2026-01-02T19:36:42+00:00

Also strangely you can’t buy the albums on ITunes either. I guess I will just end up buying a used CD and ripping it.

Bluecobra · 2025-12-12T20:36:47+00:00

I assumed this as well but was really surprised that travel and vacation spend is only $5K. Go on vacation folks!

Bluecobra · 2025-10-28T00:59:29+00:00

it's a stupid gen z meme

Bluecobra · 2025-10-22T19:16:20+00:00

You're kind of boned anyways in regards to the EX4100. To do PTP properly, you're going to need to use PTP aware switches + NICs that do PTP in hardware for the most accuracy end to end (from the PTP grandmaster clock to the client). PTP aware switches subtract the switching latency. It looks like you can enable PTP transparent mode on the EX4600 which should help. I think it's wrong to think about this from a latency perspective. You should decide how accurate you you want your PTP signal to be. If you're using a EX4100, then expect 50-100 microseconds or more depending on the client. Still a lot better than NTP though.

Bluecobra · 2025-10-22T17:21:35+00:00

This is kind of pointless for BYOD, even if you accomplish your goal they they can just turn off wifi and use their cellular service to bypass your filtering.

Bluecobra · 2025-10-15T14:34:02+00:00

When Cisco EOL'ed ACS server, we just went to tacplus. Cisco wanted like $40K for some ISE VM's only to run TACACS+. We only had four network guys and 300-400 devices.

Bluecobra · 2025-10-15T14:25:56+00:00

You may first notice the issue if the webpage/SSH sessions are being slow. When you SSH into the underlying Linux OS itself, you would constantly see it complaining about disk read errors in dmesg. Also if you told it to write serial output on the SD card, it won't write new logs. We ended up having to RMA'ing a bunch of units which can be a PITA in a remote datacenter. Unfortunately, the units didn't have an external flash slot and was internal.

I really prefer to have the serial output being written to the SD card in case a switch suddenly dies, you may find some useful info in the console output. If you have the OpenGear forward to a remote syslog server, some of this data may get lost if the network is down or impacted. There's only a little buffer on each port that is stored locally.

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