Cisco N3K-C3048TP

Discussion in 'Networking' started by Yarik Dot, Apr 14, 2017.

  1. Yarik Dot

    Yarik Dot Active Member

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    I have seen cheap N3K-C3048TP on ebay. Is there any reason for that?

    I think of buying several of them and use them as ToR L3 switches (IPv6 static inter-vlan routing).

    Current setup in my mind is no vPC, just a single switch per location. However, I am open to vPC as storage servers require 4 uplinks each (due to traffic burst before content is cached on 10G proxy servers).

    Currently using dell n3048, which I am really not happy with.
     
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  2. mstrzyze

    mstrzyze Member

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    well it depend what is "cheap" for you - if you are not happy with price on ebay i can sell you in higher price :)

    anyway, nice switch for 1GE, Openflow, vPC..PTP, latency usually <1usec
     
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  3. Yarik Dot

    Yarik Dot Active Member

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    Just wonder why they are so cheap. Those switches are relatively new, full featured and they are not end of life/sale.

    Other switches are much more expensive. Even that stupid dell switch is way away from what they should ask for that piece of crap.
     
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  4. Evan

    Evan Well-Known Member

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    Not really a popular switch though... most bigger installs are using nexus 9k's like 9372TX or 93108TC-EX to get 10G TOR and 1G stuff is just being dumped regardless of how new it is, most places won't reuse that as a management switch or whatever as they probably have a policy of having support and then you just choose something cheap more management networks like 2960XR
     
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  5. Yarik Dot

    Yarik Dot Active Member

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    So, now I understand, why they are so cheap. Update can easily brick them: Issues with OS upgrade on Nexus 3048TP : Cisco

    I bought several switches, all with different firmware version. Now I am stuck with firmware I received them with.
     
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  6. Yarik Dot

    Yarik Dot Active Member

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    For anyone who found this topic. I couldn't find 5.0.3.U5.1 firmware, but successfully upgraded to 1a version:

    Images will be upgraded according to following table:
    Module Image Running-Version New-Version Upg-Required
    ------ ---------- ---------------------- ---------------------- ------------
    1 system 5.0(3)U3(1) 5.0(3)U5(1a) yes
    1 kickstart 5.0(3)U3(1) 5.0(3)U5(1a) yes
    1 bios v1.2.0(08/25/2011) v1.2.0(08/25/2011) no
    1 power-seq v4.4 v4.4 no
     
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  7. Yarik Dot

    Yarik Dot Active Member

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    Just to update what I deal with when upgrading cisco switches. I found great article explaining everything: New packet slinger for the lab – Nexus N3K-C3048TP-1GE

    TLDR - I have to upgrade to specific versions
    1. kickstart: version 5.0(3)U5(1) system: version 5.0(3)U5(1)
    2. kickstart: version 6.0(2)U6(2a) system: version 6.0(2)U6(2a)
    3. kickstart: version 6.0(2)U6(7) system: version 6.0(2)U6(7)
    4. NXOS: version 7.0(3)I4(7)
     
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  8. Joao Paulo Mello

    Joao Paulo Mello New Member

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    I have updated the nexus 3840TP several times in several devices without any issues really.
    You just need to follow the upgrade path to the letter.
    IMO they are great switches for the price if you can live with only 4xSFP+. Loud as hell definitely a SOHO isn't the place for them. I have quieted mine by modding the fans.
     
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  9. Lefty

    Lefty New Member

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    Would you mind sharing how did you mod them?
     
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  10. Joao Paulo Mello

    Joao Paulo Mello New Member

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    First I changed the fans ( from fan module and PSU's) for silent sunon models, that not worked. So I used this:
    https://www.amazon.com/Noctua-NA-SR...ie=UTF8&qid=1548187605&sr=8-1&keywords=NA-RC7

    You can improvise with resistors but I had some of those laying around so I used them.
    You have the cut the wires and adapt, but works. It does some noise at boot as usual but right after is dead silent compared with the stock fans, you still have a whoosh...but it's almost not there.
     
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