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Any love for fiber at LTT?

sangokudbz79
By sangokudbz79
in Networking
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Posted

Hi!

 

I saw a whole bunch of nice LTT videos talking about servers and I was wondering : Where is the optical fiber at?

 

It just seems like whenever fiber is available, you get a cooper version ^^? (Talking here about the original 10gbit base-t choice, the QSFP cooper, every server equipment that I saw in the videos etc..)

 

Just wondering :)

 

 

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Posted

if i'd have to take a wild guess, price, and/or the fact fiber is rather fragile.

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The thread was moved to the networking section

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3 minutes ago, manikyath said:

if i'd have to take a wild guess, price, and/or the fact fiber is rather fragile.

price is the big one. sfp+'s and qsfp's and the cable cost much more than a short direct attach cable.

 

You can bend them a lot though normally. You can't kink them, but there much easier to worth with than a cat 6a would be.

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1 minute ago, Electronics Wizardy said:

price is the big one. sfp+'s and qsfp's and the cable cost much more than a short direct attach cable.

 

You can bend them a lot though normally. You can't kink them, but there much easier to worth with than a cat 6a would be.

but you can be rough to a cat6a cable without fearing it'll break.

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The splicer alone is  $800 or something crazy like that

▓ƆԀ▓ S▓₱▓Ɇ▓c▓s▓: i7 6ʇɥפᴉƎ00K (4.4ghz), Asus DeLuxe X99A II, GT҉X҉1҉0҉8҉0 Zotac Amp ExTrꍟꎭe),Si6F4Gb D???????r PlatinUm, EVGA G2 Sǝʌǝᘉ5ᙣᙍᖇᓎᙎᗅᖶt, Phanteks Enthoo Primo, 3TB WD Black, 500gb 850 Evo, H100iGeeTeeX, Windows 10, K70 R̸̢̡̭͍͕̱̭̟̩̀̀̃́̃͒̈́̈́͑̑́̆͘͜ͅG̶̦̬͊́B̸͈̝̖͗̈́, G502, HyperX Cloud 2s, Asus MX34. פN∩SW∀S 960 EVO

Just keeping this here as a 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Posted

There are only three advantages that fibre provides over DAC when talking 10gig/40gig

  • Better compatibility with GBIC's versus DAC cables
  • Longer runs availible
  • Slightly lower power consumption (scales when talking an entire data hall)
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Posted
1 minute ago, Electronics Wizardy said:

yep, but man that 6a stuff is thick

remember, they have berkel around, that guy touches a fiber and it's done for :P

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Posted
3 minutes ago, SamStrecker said:

The splicer alone is  $800 or something crazy like that

Anyone with a brain would just buy the amount of fiber cable they need, then wrap the excess 1 inch around something inside their patch panel.

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1 minute ago, Windspeed36 said:

Slightly lower power consumption

i'd say more than slightly.. i worked on equipment that had 48 direct attached copper cables per switch, during plugging stuff in the switches went from "a cool breeze" to "hairdryer, scorching your skin in the process"

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5 minutes ago, manikyath said:

i'd say more than slightly.. i worked on equipment that had 48 direct attached copper cables per switch, during plugging stuff in the switches went from "a cool breeze" to "hairdryer, scorching your skin in the process"

Even 48 SPF+ and QSFP+ fibre modules would use a fair amount of power. The biggest downside to 48 SFP+ DAC is the damn cable bulk and the fight you have to do to cable manage it nicely, then after all that effort someone needs to remove 1 cable in the middle. RIP all your effort.

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Posted

I dont use fibre coz the second hand market is too expensive

             ☼

ψ ︿_____︿_ψ_   

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2 minutes ago, leadeater said:

Even 48 SPF+ and QSFP+ fibre modules would use a fair amount of power. The biggest downside to 48 SFP+ DAC is the damn cable bulk and the fight you have to do to cable manage it nicely, then after all that effort someone needs to remove 1 cable in the middle. RIP all your effort.

you get the ticket to move a switch.

 

You go to the switch.

 

There are about 10 qsfp direct attach cords tightly strung infront of it.

 

So you talk to the people who manage the cables.

 

Then you uplug those suckers and realize there to short to manage.

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1 minute ago, leadeater said:

Even 48 SPF+ and QSFP+ fibre modules would use a fair amount of power. The biggest downside to 48 SFP+ DAC is the damn cable bulk and the fight you have to do to cable manage it nicely, then after all that effort someone needs to remove 1 cable in the middle. RIP all your effort.

trust me man, i know :D

 

and also, this place was basicly 10 gig everything, they would rather put mutliple 10 gig links than one faster link, for redundancy purposes. if "downtime isnt an option", mroe than 10 gig over a single cable is too much to lose at once.

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24 minutes ago, manikyath said:

trust me man, i know :D

 

and also, this place was basicly 10 gig everything, they would rather put mutliple 10 gig links than one faster link, for redundancy purposes. if "downtime isnt an option", mroe than 10 gig over a single cable is too much to lose at once.

Haha you just described us :P. Except we are 40Gb distribution and 10Gb to servers, our firewalls are also 40Gb and when out Netapps get replaced those will also likely be 40Gb.

 

Dual 48 SFP+ ToR switches with 2 QSFP uplinks each out of them, racked devices have a single connection to each switch. ToR switches connect to 40Gb distribution switches etc etc you get the point, common setup but using nice toys.

 

We also only run active-passive connectivity in our DCs between everything so if there is a link fail-over it can never cause unexpected over subscription, servers included. Nothing is allowed to be configured in any kind of Active-Active manor, servers/filers/ToR switches etc.

 

Edit:

Basically half our network is wasted doing nothing 'just in case'.

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12 minutes ago, leadeater said:

Haha you just described us :P. Except we are 40Gb distribution and 10Gb to servers, our firewalls are also 40Gb and when out Netapps get replaced those will also likely be 40Gb.

 

Dual 48 SFP+ ToR switches with 2 QSFP uplinks each out of them, racked devices have a single connection to each switch. ToR switches connect to 40Gb distribution switches etc etc you get the point, common setup but using nice toys.

 

We also only run active-passive connectivity in our DCs between everything so if there is a link fail-over it can never cause unexpected over subscription, servers included. Nothing is allowed to be configured in any kind of Active-Active manor, servers/filers/ToR switches etc.

 

Edit:

Basically half our network is wasted doing nothing 'just in case'.

Can it pull off 40gbps line rate, though?

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1 minute ago, Mornincupofhate said:

Can it pull off 40gbps line rate, though?

There're HP switches so no lol.

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13 minutes ago, leadeater said:

Basically half our network is wasted doing nothing 'just in case'.

this, except they also ha a whole another datacenter "just in case" xD

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Posted
16 minutes ago, Mornincupofhate said:

Can it pull off 40gbps line rate, though?

Distribution are HP 7904 and ToR are 5900.

 

Edit:

Unless you meant the firewalls, then those are FortiGate 3700D

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14 minutes ago, manikyath said:

this, except they also ha a whole another datacenter "just in case" xD

Also us xD.

 

Edit:

We have two of EVERYTHING. So much money is spent in the IT sector on 'just in case', sometimes because we need to and other times we are either forced to or no body can decide was is and isn't important so DR all of it.

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