Question about HP ProCurve 2626 (J4900B) 24x10/100 Mbps Networking Switch

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Consistent 2 minute dropout

Hi there,

We have two HP 2626 connected back to back via media convertors across fiber between buildings. We are having dropouts every month or two and they always last really close to two minutes. Is there a way we can confirm that its not an issue with the switches? When we lose the connection, the "send" switch shows these errors: "Half Duplex Mismatch" and "Excessive late collisions". The "receive" switch shows "Excessive CRC/alignment errors" The fiber has been throughly cleaned and tested. The media convertors as well as the patch cables have been replaced. There is only one main signal going through the switches plus a serial to ethernet convertor that transmits a very small amount of data. Any assistance would be appreciated.

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  • teeedub May 23, 2008

    We have turned up the logging on both the switches hoping to see errors but none show up. We will definitely try to ensure that everything is running on the same duplex. There is no firewall connected to this system. It consists of a node-switch-media convertor-fiber-media convertor-switch-node. It is just an elaborate way of getting signal over fiber without having to use GBIC fiber adapters that cost 10x as much.

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For uplinks and backbone, make sure you set the speed and duplex and do not leave it to auto configure

Posted on Jan 29, 2015

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Have you tried to telnet into your device and turn up the logging? Also, have you confirmed at what duplex you are running on the ports that the actual connection is coming in on? Is there a firewall connected to your switches? If so, have you checked the NIC cards to make sure they are functioning appropiately? Check out your DMZ card to see if that is causing any issues.

Posted on May 23, 2008

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1 Answer

What is the default IP for ProCurve 2626?


Hi,

check out the HP website. HP has a lot of very good resources for all of their products. here is the link:
http://www.hp.com/rnd/support/manuals/2650_6108.htm

hope I could help you out on this.

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Can see switches but not the personal computers


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The purpose of hp procure switch 2626


There is nothing special about these switches other than that they are managed. Managed means they have some means of connecting to them and "managing" them like you do when you configure a wireless router by going to some ip address in your browser to access the configuration. They usually are able to communicate statistics, set up virtual subnetworks, monitor ports, mirror ports, control which ports can access which others, set speed limits on ports, etc... A normal switch is "dumb", there is nothing to configure and it just does it's thing, connecting anybody and everybody that are connected to any of it's ports. Procurve switches are popular because they are great switches, there are other managed ones that can be had for much less, I use 48 port managed Linksys that have/exceed these capabilities for way cheaper... examples

Jan 28, 2009 | HP ProCurve 2626 (J4900B) 24x10/100 Mbps...

1 Answer

Procurve 2626 installation


You'll need to obtain a comms lead - connects into the console port of the switch then into an RS232 port on your laptop. Then, you will be able to connect using hyper terminal and you can give the switch an IP address, username, etc. Even a hard-reset won't allow you to configure an IP address as by default it needs to be configured through the lead. Will they not talk without being configured? If you just hard reset them, they should just behave as unmanaged switches.

Aug 14, 2008 | HP ProCurve 2626 (J4900B) 24x10/100 Mbps...

1 Answer

Mini GIBIC Problem


I would try changing ports and see if that resolves the issue, if not, then run a fox and hound on the cable. even though you have a connection light on the swith in building 3 I would also try differant port or swithc, I would also check the ends of the cables to make sure both ends have a good connection. Hope this helps.

Aug 17, 2007 | HP ProCurve 2626 (J4900B) 24x10/100 Mbps...

1 Answer

Network keeps dropping out.


Yes, you are correct in stating that one has to be the master, and one needs to be the slave. Normally, if you go to the manufactures website, and look for documentation on that model of switch, it will walk you through step by step on installation and re-installation. I have personally downloaded documentation from the Cisco website for setting up a large network. Try that, if you have further questions, please respond back.

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