>Sysadmins will never know the feel of unboxing a shiny new optical DWDM amplifier
Networking is the best IT field. What are my fellow network engineers working on today?
Recognized that card immediately. Built a regional network about 8 years ago with all 15454s. They have come a long way since then it seems - multi-degree and protection are easier. Fewer cards in the solution now as well.
I'm actually new to these. We're using babby's first DWDM with the EDWMD and they stopped backing the basic 7.5 dbm amp so we had to buy these instead.
Did you do 10g/100g? Or something else?
Rarely do I find hardware to be so pretty, but these cards are just sexy.
All of our stuff was 10G lambdas. I haven't touched DWDM since 100G has been available :(
We had some shitty spans and had some EDFAs mid-span. Those were a bitch to configure - all TL1. The EDFA3 was off by default I believe - so you MUST configure it to even fire the laser.
We had 10G tuned Xenpaks - those went straight into WSS/DMX on it's respective channel. Had some MXPs for 1G and FC. Had the 20x1G Crossponder to do "cheap" 1G in a ring topology.
On the last networking thread someone was helping me understand subnetting and I mostly got it, but still unsure about some stuff.
On my home network if I set up my subnet mask to /16 on two of my computers they can communicate and use any IP that is 192.168.x.x but none of them can communicate with my router if they're not 192.168.1.x which I guess makes sense.
My question is, someone mentioned /16 and /24 being different subnets, but can /16 see everything at /24 but there can't be communications because something at /24 can't see what is at /16?
And why is /24 at 192.168.1.x why is the third octet 1?
I started with CompTIA A+, network and security certs.
Getting a TS SC from my first internship certainly helped too.
I hear the cisco certs are better than CompTIA nowadays though
Most home routers are only configurable for one subnet. the slash notation corresponds to the netmask.
Most home networks use a 255.255.255.0 netmast which would give you a /24 subnet something like x.y.z.(254 potential hosts)
192.168.1.1, 192.168.1.2. If you use a different subnet mask you would have more or fewer potential hosts available.
>Can /16 see what is at /24?
Two different networks can see each other if they are networked together. If you have a home router configured for a /24 subnet and try to assign a computer a static assignment on a /16 you will have a bad time.
>2. Why is the third octet on /24 a 1 (192.168.1.x)
Any of the first 3 octets of a /24 can be any value (valid). Why not name your network 1.1.1?
Look over that cheatsheet and make sure you understand fully how the slash notation, subnets, addressing, and available hosts all tie in. It makes a shitload of sense once you see WHY that all happens.
EDFA = erbium doped fiber amplifier. For higher gain, Raman amplifiers are used. Raman was a famous Indian scientist who invented the basic mechanism for modern fiber amplifiers.
I write software for equipment like this. I have a bachelor's of engineering in the field of software engineering. After graduating I applied for a job and that was it. There are a million jobs of this nature where I live.
Maybe a little more clearly:
The netmask will specify the amount of hosts (avialable address) you can assign on that network - this is also kept track of in slash notation. A /30 will give you 2 usable IPs, a /29 will give you 6, a /28 14, etc. (Class C addressing)
The hosts are the "ending" part of your IP - (the part that isn't covered by the netmask). If you think of a standard home 192.168.1/24 network you see that the netmask 255.255.255.0 covers like so
192:255 this ip value cant be different and be part of the same subnet
168:255 this ip value cant be different and be part of the same subnet
1:255 this ip value cant be different and be part of the same subnet
x:0 The last octect is where the host IP is defined which corresponds to a lack of netmask (0 bits). 1-254 (255 reserved for broadcast)
Uh, probs to you anon for answering a question that should have been in a stupid questions thread.
You're lucky you don't need Raman amps. I worked on safety software for my company's Raman solution so I had to test fiber pulls myself. There were already lot's of safety mechanisms in place but if any of those failed, the 1.0 watt laser is capable of burning skin and blinding anyone not wearing protective goggles. While I've never witnessed a safety failure personally (the amps are designed to shut off via FPGA if excessive back-reflection is detected), there was one tester who accidentally pinched a fiber while inserting a card into the chassis and burned the plastic coating off of a fiber. At the time he claimed there was a "fireball" and scared the shit out of the entire company (we have lots of expensive equipment all in one huge lab, so a fire hazard is serious business) and we had to make rounds in the lab to ensure there wasn't a fire.
Assuming it's a home network using 192.168.x.x:
/24 can use any IP that is at 192.168.x.x so can something at 192.168.x.x /16 see what hosts are on a 192.168.1.x /24 subnet and run a network sniffer for example?
>What are my fellow network engineers working on today?
How to get a half smoked blunt out of an ethernet socket.
Its stuck in there i think it tore the connector off the mainboard and is stuck in the IO shield itself but i can't open it up cuz the server can't be turned off under any circumstance, its been two days and nobody noticed it but they will eventually and i don't want to get fired.
Any advice /g/?
Stop thinking in terms of your specific application and read what I've said. It answers your question fully. Most home routers deal with controlling only a single class C subnet. If you try to make a router act as a gateway for something out of its subnet you are in for a bad time. Any two networks can always talk to each other if properly connected configured.
I'm at home dude and i can't just walk in there after hours, its not some punk ass startup, you've probably heard of the faggots i work for.
I can describe it though:
Its on the middle part of the server rack halfway into a previously empty ethernet port (as i said though i think the connector broke off the motherboard), but the problem is that the two ports beside it are in use so there's two ethernet cables making it difficult to reach the blunt stub and i can't disconnect those cables because it'll probably fuck major shit up and get me fired harder then the blunt.
Any way i can get it out without damaging anything else and also can a ethernet socket be installed somehow from the outside, just into the IO shield it doesn't have to be connected to the mobo or anything just look normal from the outside???
Also generally wat do?
>dad's friend hooks me up with the job
>studied psychology, don't know shit about networking
>google shit all the time and make shit up as i go
>it seemingly works and i keep the job
>day before first phat paycheck
>feeling like a motherfucking king
>sneak gf into server room
>get high as fuck
>blunt in ethernet port
I honestly don't know exactly how it happened.
But seriously though, how do i fix this shit /g/???
>But seriously though, how do i fix this shit /g/???
With pic related.
Or in your case, maybe a roach clip :^-)
> mfw i was at the Norwegian internet exchange, all the internal traffic in the country goes trough here.
> its literally a single cisco 6500 in one rack and the ISP's L3 routers in the rack next to it.
Wait, you did this? That just makes this 100x funnier.
its was actually cooled by pic related
Did you do any opnet modeling in college? Did you write any network simulations? Once you get beyond the simplest networks shit gets into chaos theory territory. Once reliable and trustworthy exact solutions become completely useless and you have to rely on computer simulations to model anything. Even just programming a random event generator to produce the right statistical distribution you want is tough. Take a stochastic processes course and you will understand.