Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

If you get the chance, always run more extra network fiber cabling

utcc.utoronto.ca

Post reply on HN
Print view View original

161–170 of 250 posts

Re: If you get the chance, always run more extra network fiber cabling

#161

Post by mrheosuper »

Dylan16807 wrote: post #150
DannyBee wrote: post #139

Earlier quoted context omitted.

"And be careful of the minimum bend radius." The minimum bend radius of any good fiber is way less than cat6 at this point. G.657A1/B1 = 10mm G.657A2/B2 = 7.5mm G.657A3/B3= 2.5mm CAT6 = 25mm Flexible cat6 = 15mm. Fiber surpassed copper for flexibility almost 2 decades ago (G.657 was introduced in 2006, but let's call it 5 years before all forms became common). Even G.652 was only 25mm and standardized in 1984.

It takes less force to bend, though.

could be solved by running reinforce wire along it

Re: If you get the chance, always run more extra network fiber cabling

#162

Post by DeathArrow »

At home I have a pair of single mode fiber running in each room, it is future proof enough for me.

ATM running at 1Gbps, but I will soon upgrade the router, switches, SFP+ modules to run at 10Gbps since my internet provider will upgrade the offering from 2.3 Gbps to 10 Gbps this year.

Re: If you get the chance, always run more extra network fiber cabling

#163

Post by kevin_thibedeau »

throwaway2037 wrote: post #138
bhouston wrote: post #27

Earlier quoted context omitted.

I have, but now I have cable running along the base boards. That isn't optimal. Also I have 10G networking, so the ethernet switches are hot and expensive.

> Also I have 10G networking, so the ethernet switches are hot and expensive. I never understand why anyone needs anything faster than 1G (other than to flex for Internet points). Seriously, how often do you need to move data faster than 100MB/s? Almost never. FYI: A 2.5G switch should be fine. There are many fan-less options here: https://www.servethehome.com/the-ultimate-cheap-2-5gbe-switc...

DLT drives can saturate a 1Gbps link. Makes it hard to prevent shoe shining when backing up file servers.

Re: If you get the chance, always run more extra network fiber cabling

#164

Post by archagon »

throwaway2037 wrote: post #138
bhouston wrote: post #27

Earlier quoted context omitted.

I have, but now I have cable running along the base boards. That isn't optimal. Also I have 10G networking, so the ethernet switches are hot and expensive.

> Also I have 10G networking, so the ethernet switches are hot and expensive. I never understand why anyone needs anything faster than 1G (other than to flex for Internet points). Seriously, how often do you need to move data faster than 100MB/s? Almost never. FYI: A 2.5G switch should be fine. There are many fan-less options here: https://www.servethehome.com/the-ultimate-cheap-2-5gbe-switc...

If you have a NAS, for one. Fill it with SSDs and you can even saturate 10Gbps.

Re: If you get the chance, always run more extra network fiber cabling

#165

Post by slow_typist »

epiccoleman wrote: post #69
nkurz wrote: post #65

Earlier quoted context omitted.

> A family member who's doing better in life than I am purchased a house built within the last 5 years, and it didn't even _have_ Ethernet run anywhere. WHY!?! I can't fathom how it's possible anyone would find that a negative. I'm less sure. Are there any 40 year old cables that you'd consider a positive in your house today? 20 year old cables? I wouldn't be too excited about having a house full of Coax, 10Base-T, a…

> 20 year old cables? I just bought a new house and the previous owner had phone lines everywhere (bedrooms, kitchen, office, rec room - honestly kind of weird). The house was built in 2002 and I gather that it was common at that time to put in Cat5e and just not use all the pairs. So all it took was a pleasant afternoon with the circuit toner, a new patch panel, and a few keystone jacks, and now the house is network…

You are lucky they went with cat5. In my house there are phone lines everywhere, too, but real phone lines. Like in ISDN. That’s 8 strands plus some extra strands (the European ISDN bus needs 4 strands, so for a faked star topology you need 4 to every room and 4 back). It is neither shielded nor twisted of course. Just plain dumb copper wires. On some connections a stable 10 Mbit link is possible. From what I gather the cables were installed around 2000…

Re: If you get the chance, always run more extra network fiber cabling

#166

Post by walrus01 »

DannyBee wrote: post #139
msarrel wrote: post #4

Yup, always run extra everything. At least you can splice fiber now. And be careful of the minimum bend radius. Once, in the 90s, we were having intermittent network failures in our data center. I kept trying to troubleshoot it with the fluke, but the problem kept moving. When I pulled up the raised floor, I discovered that rats were eating the exterior sheath of the network cables. That was some fun troubleshooting!

"And be careful of the minimum bend radius." The minimum bend radius of any good fiber is way less than cat6 at this point. G.657A1/B1 = 10mm G.657A2/B2 = 7.5mm G.657A3/B3= 2.5mm CAT6 = 25mm Flexible cat6 = 15mm. Fiber surpassed copper for flexibility almost 2 decades ago (G.657 was introduced in 2006, but let's call it 5 years before all forms became common). Even G.652 was only 25mm and standardized in 1984.

for an example of how good modern g.657 bend loss insensitive fiber is, for ftth applications and drop/last hundred meters, here's an example of it being abused with a staple gun and the resulting loss in dB.

https://www.youtube.com/watch?v=h4wzJSInvww

the above is from 12 years ago

I've seen some g.657.b3 patch cords and work done for FTTH installs that are absolutely atrocious and yet continue to function properly.

Re: If you get the chance, always run more extra network fiber cabling

#167

Post by mschuster91 »

timzaman wrote: post #8

1. High-level, the post is all wrong. The point should be that you always need to make sure you can pull new cable . The poster illustrates this: single mode, multi mode, non-fiber, etc, etc. And if one "goes bad", you still can't run a new one, unless you have a pullstring. 2. The post cannot apply to fast/large networks - will be prohibitively expensive. 3. If running a few at home, I suggest to run MTP/MPO. It's b…

> 3. If running a few at home, I suggest to run MTP/MPO. It's basically a structured cable that can have around 12 fibers in them, plenty of future expansion.

For a homelab honestly just pull pre-terminated cable with LC connectors, a 20 or 25mm hollow pipe is enough. That way you don't need a splicer machine, experience on how to operate it, or measuring equipment.

Re: If you get the chance, always run more extra network fiber cabling

#168

Post by Symbiote »

0_____0 wrote: post #158
throwaway2037 wrote: post #134

Earlier quoted context omitted.

> Paris downtown Where is downtown Paris? 1/2/3 arrondissement? I never heard the term used for Paris. Mostly, it is used to describe the Wall Street area of Manhattan (NYC) as the island is relatively north-south and Wall Street is on the southern end.

I notice that non US English-speaking tend to use the term CBD instead of downtown, my assumption is that it is because of the NYC thing you mention

British people would say city centre or town centre.

Australians are the ones who say CBD.

Re: If you get the chance, always run more extra network fiber cabling

#169

Post by Symbiote »

ghaff wrote: post #160
jaxn wrote: post #147

Earlier quoted context omitted.

Maybe in an apartment. In a house, you want wired backhaul on access points, and wired streaming devices.

Why? Is this an actual problem? I have a bunch of wired connections (or at least had) but I'm not sure I ever saw a difference and I'm certainly not going to spend time or money retrofitting them for some Platonic ideal--ADDED, at least in recent years or outside of specific situations.

It's potentially a problem in a typical brick house in Europe.

I'm sure it's less of a problem in houses with other materials.

Re: If you get the chance, always run more extra network fiber cabling

#170

Post by TeMPOraL »

travisjungroth wrote: post #146
throwaway2037 wrote: post #134

Earlier quoted context omitted.

> Paris downtown Where is downtown Paris? 1/2/3 arrondissement? I never heard the term used for Paris. Mostly, it is used to describe the Wall Street area of Manhattan (NYC) as the island is relatively north-south and Wall Street is on the southern end.

It’s also come to mean the densest part of any city. Even the town I group up in would call the densest part “downtown”, even though the only buildings taller than two stories were city hall and the historic theater.

Today I learned!

I always thought "downtown" and "uptown" were more like "south from X" and "north from X" where X is some reference point in context (e.g. "where I'm standing"). Turns out, it's more similar to "downwell" and "upwell", i.e. towards or away from some central point (gravity wells being spherical-ish and all).

Post reply on HN