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CHQsean

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CHQsean

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September 24th, 2003 16:00

Network Manager Installation

I just downloaded the Openmanage Network Manager.  I was reading through the Hardware Requirements and I came across the following note:

              NOTE:

Using the application in a DHCP environment can cause unwanted side effects.

              It is recommended to not use the application in a DHCP environment, if at all possible.

 

does this mean that the software won't work in a DHCP environment?? aren't most networks DHCP now?

thanx,

Sean

  • Andrew_Hicks1

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    Posted September 24th, 2003 18:00

    I think the text should be clarified a bit:

    A DHCP environment is fine for clients, however... keep in mind two things.  DHCP for your switches is not really a good idea.  If the switch has to pull its IP address (used for management) from a DHCP server, and a problem occurs with the DHCP server, you won't be able to manage the switch - this would cause problems for Network Manager, as a lot of features could be severely impacted by a problem on a DHCP server, or if the switch IP address changes, for whatever reason (two features that would most be impacted would be the cut-thru feature and the ability to push firmware updates or backup configuration files).  IP addresses are not updated if they change UNLESS you go through the discovery process again - so SNMP can give the Network Manager updated information on the switch.

    The other reason I probably wouldn't recommend DHCP is that Network Manager is a Client/Server application.  IF both are installed on the same system, it's not much of a problem.  However, you can have up to three client installs attach to the Network Manager server remotely.  This gives you a bit more mobility, but as with most server-side applications, you could run into problems if the IP address changes suddenly.

    Mind you, there are many ways to 'guarantee' a particular system, switch, etc. gets an IP address from DHCP every time a lease is called, but even those can be prone to failure, and thus why it's not recommended.

    I think, more than anything else, the documentation's use of the term 'environment' is a bit vague.  I hope this explanation helps clarify things for you.

  • 316

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    Posted September 24th, 2003 18:00

    Thats a good question, I hope the answer is "Yes, it will work in a DHCP enviroment". I too am trying to run this in a DHCP enviroment without much luck.

    -Mike

  • CHQsean

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    Posted September 24th, 2003 18:00

    that is what i was hoping you would say. 

    all our switches have been given static addresses.  the server/client will have static, as well. 

    the way the Note was worded made me worry that maybe the discovery would effect my DHCP server.  

    thanx for your help.

  • bcharamu

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    Posted February 18th, 2004 19:00

    The wording of this requirement will be changed.  Essentially, machines running ONM should have IP adresses which do not change.  It doesn't matter how this is achieved.  The "unwanted side-effects" phrase simply refers to the affects of changing the IP address of the machine running ONM, which may be summarized as, "Server won't start."  Delete the entire {INSTALL_DIR}\oware\temp directory after stopping all server / client processes on the box, and you're fine.  I'll have to check to see if this has been fixed already, but there's no reason I can think of not to use static IPs for these machines anyway.