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Wireless Networks Thread, 10Gb connection over fiber in Technical; Originally Posted by Chillibear Remember the most likely 40 and 100GB solutions will use parallel fibre technologies, Depends on your ...
  1. #16

    SYNACK's Avatar
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    Quote Originally Posted by Chillibear View Post
    Remember the most likely 40 and 100GB solutions will use parallel fibre technologies,
    Depends on your budget, using multiple light frequencies and/or TDM you can push more than one 10GB signal down a single fibre.

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    matt40k's Avatar
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    I've only ever heard of one company using 100GB, that was between two major DC, the card for one of the router was in well into the 6 figure mark. Which is silly as you could get 20x 10GB for less money.

    I know Cambs LEA is spec'ing 10GB backbone currently with 1gb to desktop. Generally your server should have at least 2x connections at your backbone speed (boned)

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    Quote Originally Posted by matt40k View Post
    2x connections at your backbone speed (boned)
    Hehehe - 'boned', Don't you mean trunked

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    Quote Originally Posted by Michael View Post
    I agree with what you're saying, however, you really need to ask whether or not you're currently pushing anywhere near the limits of 1Gbps on your servers, even if you had 1Gbps to the desktop. You could debate that because network traffic would be moving so fast, your overall levels of traffic would drop as they'd be no bottlenecks.
    I would in part agree with what you are saying but it's the between switch bottle necks that I think we're looking at which when you get to the core switch the traffic can be going to more than just a server... also if you want to start looking at vitualising the/to the desktop then you'll be putting lots more load on the link, also if you're just deploying apps or OS's then you're going to be pushing bandwidth requirements if you want to do it at the same time as others are using the resource. In my opion you want the fastest connections possible as you want to keep end users happy about something and that is getting harder as the days go on.

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    Quote Originally Posted by Chillibear View Post
    Regarding cable runs 10G should run to 300m on OM3, 40G and 100G should run to 100m on OM3 cabling and probably ~150m on OM4.
    basically we want the highest standard of fiber avalible at the time, is OM4 the highest of the moment or is there an OM5/6/7/...?

    I should be ok if I ask for the OM<4 fiber and 48core to each cab?

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    Quote Originally Posted by SYNACK View Post
    Hehehe - 'boned', Don't you mean trunked
    hehe dont you mean teamed

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    Actually I meant Bonded... sigh, I need a personal grammer\spell checker... any offers?

    bonded > linux\unix
    teamed > intel
    trunked > cisco

    Pretty sure Cisco will come knocking at my door asking for money for using there copyright word.

    (And you'll be boned if you try all three )

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    I've looked at my fiber cables and cant see any OM numbers on the cables

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    Quote Originally Posted by DAckroyd View Post
    I've looked at my fiber cables and cant see any OM numbers on the cables
    Should be printed every 5 meters to every meter on the patch leads and the external sheith of the main cable run. It is usually printed suite small though it should also be marked with the wavelength ie 50/125 or 62.5/125 or 100/140.

    http://www.thefoa.org/tech/ColCodes.htm
    Last edited by SYNACK; 25th March 2009 at 10:17 AM.

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    Quote Originally Posted by DAckroyd View Post
    basically we want the highest standard of fiber avalible at the time, is OM4 the highest of the moment or is there an OM5/6/7/...?

    I should be ok if I ask for the OM<4 fiber and 48core to each cab?
    The OM4 standard is yet to be ratified, however is being based around Systimax Lazrspeed 550. Their Lazrspeed 330 cabling is OM3. I don't know about other manufacturers and if they offer products that 'will' comply with the 'standard'.

    Quantity wise it's a matter of weighing up the costs against usage of the fibre. If you put in 48 cores and end up not using 40 of them for five years - was the cost worth it? Equally if the install costs are massive (say between buildings and digging up playgrounds) then it may well be worth laying the dark fibre now. Always worth getting quotes for your options!

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    I've just noted down what it says on the cable (the patch leades look like OM2)

    CFR-00373 4 core 50/125 int/ext fiberoptic cable 0500/0800 00106 L964

    it doesn't say anything about OM? can you tell from that number?

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    Quote Originally Posted by Chillibear View Post
    The OM4 standard is yet to be ratified, however is being based around Systimax Lazrspeed 550. Their Lazrspeed 330 cabling is OM3. I don't know about other manufacturers and if they offer products that 'will' comply with the 'standard'.

    Quantity wise it's a matter of weighing up the costs against usage of the fibre. If you put in 48 cores and end up not using 40 of them for five years - was the cost worth it? Equally if the install costs are massive (say between buildings and digging up playgrounds) then it may well be worth laying the dark fibre now. Always worth getting quotes for your options!
    I'm hoping to get the best possible infrastructure in while the building is being put up. at least getting some trunking in place or can they blow fiber through building like BT do down the road?

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    Quote Originally Posted by DAckroyd View Post
    I've just noted down what it says on the cable (the patch leades look like OM2)

    CFR-00373 4 core 50/125 int/ext fiberoptic cable 0500/0800 00106 L964

    it doesn't say anything about OM? can you tell from that number?
    Yeap, 50/125 is OM2 which is pretty much rubbish as far as 10GB goes it is very unlikely that it will work over a very short distance let alone a long one. We have it at one of the schools that I deal with, fine for 1GB though.

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