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Wired Networks Thread, HP V1810-48G Ports stop working until reboot in Technical; Hi all, I'm having a very odd problem with 3x HP V1810-48G Switches. Everything is working perfectly and then overnight ...
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    Nick_Parker's Avatar
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    HP V1810-48G Ports stop working until reboot

    Hi all,

    I'm having a very odd problem with 3x HP V1810-48G Switches.
    Everything is working perfectly and then overnight a few of the ports will stop working.
    The computer/laptop still picks up that it is connected & the switch still picks up the link as active but no traffic goes through.
    The computer/laptop won't be able to get an IP and even if I manually assign one, it still cannot ping or connect to anything.
    If I plug the computer into a different port then it all works, alternately, if I reboot the switch, it all starts working again (but obviously it disconnects the other 47 ports while the reboot occurs).
    I have updated the switches firmware to the latest in the hopes that maybe it was a software fault but it is still occurring. If it was one switch I would assume it to be a faulty switch but the fact that it is happening on 3 switches means there is some sort of configuration fault somewhere.
    I thought maybe it was loop protection but that isn't enabled.

    Any suggestions would be greatly appreciated

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    plexer's Avatar
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    Port blocking?

    Ben

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    Nick_Parker's Avatar
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    Not enabled
    I've found one thread on an HP forum where 2 or 3 people have had the same problem but they are also still looking for a solution.

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    cpjitservices's Avatar
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    I've seen this before on an enterprise Nortel, and we had to bin the switch.

    It's a Hardware level failure or it was on the Nortels anyway, the very same symptoms.


    Although - I would double check what Spanning-Tree is doing, you may not have it enabled but I bet it has Rapid Spanning tree or Loop detect enabled or something similar and it could be dropping the links to the switches - the links that keep dropping are they switch to switch links ????

    if this keeps happening it Might be time to ring HP and abuse your lifetime warranty
    Last edited by cpjitservices; 9th May 2013 at 10:32 AM.

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    chazzy2501's Avatar
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    have you enabled them as edge ports and turned on RSTP?

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    It does sound like a switch failure, but to have three go at once... what are the odds? I'd suggest resetting them to factory default in turn, with minimal config as possible initially. If the problem(s) are still there then I'd agree they need replacing.

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    SYNACK's Avatar
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    I thought it was rebranded 3Com not rebranded d-link. You could try turning off a bunch of debugging if there is an option and turning on a bunch of logging, there was a hack to turn on the cli I think that may give you options.

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    Nick_Parker's Avatar
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    @cpjitservices Loop detection is disabled so it's not that
    And the ports are not switch to switch links - just a random one or two of the normal 48 ports that connect to PCs.

    @chazzy2501 I don't think it's possible to enable them as edge ports?

    @Michael - There were all factory reset before I installed them, it was only after they started giving problems that I logged into them and updated the firmware.

    @SYNACK - I'll have a look and see what logging options it has

    Thanks everyone for your input so far!
    Last edited by Nick_Parker; 9th May 2013 at 05:37 PM.

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    It does sound like it could be an STP misconfig somewhere - I'd be inclined to check the core switches and look for stp abnormalities.
    No CLI on V1810 so if you do decide to get shot of them I'd advise getting something more manageable.

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    chazzy2501's Avatar
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    I just read the manual (I don't even own this switch!) it says that under the STP you can explicitly set a port as edge. (only for ports that connect to a client, not another switch)

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    Nick_Parker's Avatar
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    Am I correct in assuming that STP = Loop Detection?
    If so, Loop Detection is disabled on the switch so it can't be that causing it?

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    Ni Nick, I know its been a while, but did you ever find a solution to this problem. I am having the same issue exactly? Thanks Ben

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    Quote Originally Posted by BenMcDougall View Post
    Ni Nick, I know its been a while, but did you ever find a solution to this problem. I am having the same issue exactly? Thanks Ben
    I see this all the time with HP switches - managed, web managed and unmanaged - never worked out why. On reboot the ports come back.

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    Quote Originally Posted by glennda View Post
    I see this all the time with HP switches - managed, web managed and unmanaged - never worked out why. On reboot the ports come back.
    because their made by hP?
    @glennda Pro-Curve or 3Com ?

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    These are HP pro-curve, not 3COM rebrands. I notice that they reboot themselves roughly every 2 weeks as well !

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