Question about HP ProCurve 24x10/100 Mbps Networking Hub

1 Answer

Network is SLOW


Hi Sir,
We just switched from a Lucent DSL-HS-2.3MBS to a Westell 6100 modem, using the same cable to connect to our HP ProCurve 24x10/100 Mbps but now our network is SLOW but the we're clocking over 7mbps on speed test so it's obviously the ProCurve. Cable from modem to hum is same and we have CAT5 running to each computer from there. Computers are mix of Mac OSX, Mac OS9 and Windows 2000. With our old modem we had to apply IPs manually, but the new one seems to dynamically generate them using DHCP and the IPv4 Addresses, Subnet and Router info seems correct. On OSX machines, I have made sure to manually configure to 100baseTX, half-duplex. I have no idea how to do that on the OS9 or Windows machines so I turned those off but our network is still slow. I have no idea what to do. The ProCurve 24 (not 24M) doesn't have a console port and I have no idea what (or how to find) its IP to use the Web interface or even to Factory Reset.
Any light for a network newbie would be super-appreciated!
Miserable in Chinatown.

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  • milesahead Jan 15, 2008

    Thanks networkmagic. It's an HP ProCurve 10/100 Hub 24 (J3295A). 


    Thank you for guidance on auto-negotiation. I just do not know how to assess how it's been configured or if it ever was configured. Unlike its sister model -- the 24M -- there is no way to connect a console to it. I know the 24M has a Web interface; again, I'm not sure about the 24.


    Still, it seems weird to me that changing modems would have such a massive effect when everything else remained the same. I guess the only other change would be increased bandwidth coming into the ProCurve too . ..

  • Anonymous Jan 06, 2009

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  • Mitchell Fox May 11, 2010

    I probably wont be able to help much, but I do have some tidbits of advice.

    you said that individual computers still receive network slow downs.
    Are they having problems communicating for file transfer to one another
    without the Westell connected to the network? Make sure that its a
    file thats in the range of 1+gb that your going to xfer. Also, do you have a virus scan program or a
    anti-spyware program such as spybot - search and destroy?

    the Hub is going to be default gateway. That should be it's network address in order for you to go into it and change its settings. If you need to get into the Westell, you can try connecting directly to the Westell modem, have it auto-negotiate dhcp, and see if you can get into it from there after it gives you its IP address if you don't know what it is. Your hp ProCurve may not have a web-interface at all.

    On windows machines, to knock its bandwidth to half-duplex, you need to go onto your device manager, find your network card, and there should be a place in there to manually change the bandwidth settings.

    There may be a firmware update for both your router and your network hub. Go onto both of their sites and check it out.

    Half-duplex means that your computer will send or receive packets of information, full-duplex means that it will send AND receive packets at the same time. half-duplex is effectively cutting down the efficiency of a network into two, just keep that in mind.

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  • 139 Answers

I can assist with the full and half duplex question...but I'll need a specific HP model number for the Procurve in order to give you correct advice about it.

If the Procurve is not configurable, or has never been configured, then it is using autonegotiation to determine speed and duplex. Each of your computers should also be set to auto for speed and duplex.

The general rule of thumb is to make sure that speed and duplex for both ports on a link are set the same. For example, if the port at one end of a cable is set manually, then the port at the other end must also be set manually...to the same speed and duplex values. If one port is set to auto, then the port at the other end of the cable must also be set to auto.

Posted on Jan 15, 2008

  • networkmagic Jan 15, 2008

    This users manual may be helpful, if you don't already have one. The J3295A is not manageable, so the ports cannot be configured. It does support autonegotiation....so it should cause connected devices to set themselves to half duplex.



    It's possible that the negotiation method used by your Westell router is not fully compatible with your older hub. It's difficult to check this without a special tester, but if your Westell happens to be using full duplex, it would explain why you're experiencing a general slowness problem...it's a classic symptom when full duplex meets half duplex. You might want to consider one of the newer LinkSys (or similar) switches as a replacement for the Procurve hub. This is an example that would work as a direct replacement for the ProCurve in your scenario.

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