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Wireless Networks Thread, Network Infrastructure Question in Technical; Just out of interest what speed is your network infrastructure running at? We have a large number of unmanageable HP ...
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    Network Infrastructure Question

    Just out of interest what speed is your network infrastructure running at?

    We have a large number of unmanageable HP 2324 switches running at 100Base-T, we're looking at upgrading a few, but not sure whether to get a 1000Base-T switch or just get manageable 100Base-T.

    What is everybody else's infrastructure running at? Cost is a bit of an issue, but it's not worth buying 100Base-T if i really need to be running 1000Base-T. By the way we have thin clients, which is why i'm slightly leaning towards 1000Base-T.

    Thanks

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    plexer's Avatar
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    What is your backbone connected by fibre or copper.

    If it's copper and you are going to be buying new switches anyway you will probably buy ones with multi personality ports i.e one thats can be copper or mini gbic for fibre modules.

    This means you can plug all of your switches in with copper gigabit and give yourself and instant boost.

    Ben

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    enjay's Avatar
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    The IT Suites (and my office!) run at 1Gig, the rest of the network is 100meg, with Gig uplinks where available. The switches are mostly managed, although the level of control that management offers varies from switch to switch, the oldest ones are more like a read-only view of device status than anything you would class as "management".

    We've taken the decision not to rip out any existing switches, but when they fail or we need an extra one, we're buying managed 24-port gig switches as standard. We put the new gig one into a high-volume area and move the 100 from there to wherever the "new" switch is needed).

    At present, the only devices with Gig NICs are in the IT Suite, however as we are speccing all new computers with Gig, it won't be long before it is wider spread.

  4. Thanks to enjay from:

    Lee_K_81 (21st May 2008)

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    ICT_GUY's Avatar
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    1 gigabit coper backbone
    3 10/100 managed switches
    1 24 port gigabit managed switch
    Buying a managed 48 port gigabit managed switch for the new suite.

    Not bad for a small primary school.

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    Geoff's Avatar
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    We have a 'core' switch which is a HP ProCurve 4204 with several miniGBIC modules in. These modules hold fibre SX miniGBICs. These fibre links run at 1Gb/s. They head off to the various locations in the school buidings. At the other end there is either a HP ProCurve 2650/2610 or a 3com 3300 (being phased out). If there is need for more switch capacity at a paticular location then an extra switch is daisy chained off the spare GigE port on the ProCurve. Usually this is another ProCurve so we can maintain a Gbit link.

    The only exception are is in the main building, the server room and IT, where we use copper to connect some of the cabinets together. There's no requirement for fibre as it's an internal building connection and below the length limitation for Cat6. The Server room has it's own fibre link into the 4204 which connects into a ProCurve 2810-24G. This runs all it's ports at 1Gbit. Most of our servers are running one or more GigE NICs.

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    Backbone is fiber, new switches will have dual personality ports.

    Good point there about client NICs Nick, checked out thin client spec and they are only 10/100Base-T. No point plugging them into gigabit switches just yet.

    I'm thinking that as long as my uplinks are gigabit then 100Base-T will suffice in the short term for clients to plug into, with gigabit in certain key areas.

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    we are in the process of upgrading our backbone from 100mb copper to gigabit fibre then 100mb to workstations still 10mb in a few places

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    Geoff's Avatar
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    Quote Originally Posted by Lee_K_81 View Post
    I'm thinking that as long as my uplinks are gigabit then 100Base-T will suffice in the short term for clients to plug into, with gigabit in certain key areas.
    This is yet another reason to get managed switches. As they support snmp queries you can get per port counters of usage. Combined with something like Cacti:

    Cacti: The Complete RRDTool-based Graphing Solution

    You can see where your bandwidth is being used, where the problems are and when and if you need to think about upgrading either your backbone link or your switch in a paticular location to support higher speeds.

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    Core Switch (D-LINK DES-6500 - Fibre + 1Gb copper Modules) Links to other cabs in schools over either Fibre running at 1Gb or Copper at 1Gb. We try to get a 1 Gb link to each switch but at the moment thats not always possible so there are some daisy chaining.

    In the cabs we use D-Link DGS-3024/3048 switches and have a few old unmanaged DES-1024R(100mb) which are to be replaced in the next few weeks.

    Most our computers are now running at 1Gb and the last of the 100mb will be replaced over the summer.

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    SYNACK's Avatar
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    Core: 2x Cisco 3750 24port gigabit switches stacked (layer3 managed)
    Edge: 4x 48port gigabit D-link 1248T (almost layer2 managed)
    Links: 2gb trunks to each edge switch over fiber

    Only about half of our stuff runs at gigabit so far but the offending old pcs are being replaced slowly. All fat clients. Runs well for our school (primary) as we can chuck whatever we want through the network and have yet to come up with any speed issues.

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    Quote Originally Posted by Geoff View Post
    This is yet another reason to get managed switches. As they support snmp queries you can get per port counters of usage. Combined with something like Cacti:

    Cacti: The Complete RRDTool-based Graphing Solution

    You can see where your bandwidth is being used, where the problems are and when and if you need to think about upgrading either your backbone link or your switch in a paticular location to support higher speeds.
    Cacti is god like!

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    We're redoing our cabling at the moment as it's a horrible mess! Getting a 5406zl at the core, all servers running at Gigabit to it. Then Gigabit fiber links out from the miniGBIC modules to HP 2610-24s in satellite cabinets in the classrooms.

    Workstations connect via Cat5e at 100Mb speed, hardware can support Gigabit but the cost of Cat6 cabling and switches still costs a fair bit more, so new Cat5e is going in the rooms rather than 6

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    enjay's Avatar
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    Quote Originally Posted by gshaw View Post
    Workstations connect via Cat5e at 100Mb speed, hardware can support Gigabit but the cost of Cat6 cabling and switches still costs a fair bit more, so new Cat5e is going in the rooms rather than 6
    Why not run Gigabit over Cat5e?

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    Geoff's Avatar
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    Quote Originally Posted by NickJones View Post
    Why not run Gigabit over Cat5e?
    I'd rather run GigE over Cat6 personally.

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    enjay's Avatar
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    Quote Originally Posted by Geoff View Post
    I'd rather run GigE over Cat6 personally.
    To the extent that you would stick to 100 if you couldn't afford to re-cable? While Cat6 is preferable to Cat5 for GbE, I'd still take GbE on Cat5 than 100Mb on Cat5, personally.



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