Thanks for input. I will address each below your response Sent from my iPhone
> On Jun 4, 2020, at 1:44 AM, Chip Scheide <[email protected]> wrote: > > Chuck, > There are 2 ways to resolve this, and using both is probably best. > (following assumes DHCP) > > 1 - put a battery on the computer (server) so that when power goes down > during tests the computer does not turn off. > 1a - if this is already the case (it should be if it is a server) and IP > addresses are being changed on the server then there is a switch in the > network who's battery has failed - and Enterprise IT should track it and fix > it ( might need to enter a ticket) > There is a UPS. Indeed the machine and server never went down > 2 - talk with the IT/network people, give them the server's MAC ID (network > card ID) and request a fixed IP address server through DHCP > Notes on #2 : the network admin can assign a specified IP address to a > specific MAC address, which is assigned via DHCP, then regardless of power > outage, server reboot, etc and generally the time off the network, the IP > address of the computer does not change. This is the setup. Indeed the IP is manual. > > and BTW > - MAC is a network card term and refers to the network card's ID > - Mac(intosh) is an Apple Computer Co. computer. > > DHCP with manual address usually means that the IP address has been assigned > by specific computer Admin, rather than network admin. The IP address > assigned this way can (and appears to) conflict with the DHCP server > assigning addresses. > This is because, as I understand it, the DHCP server does not 'know' about > the manual address. The address is permanent and was assigne by network folks > > Quickly: > DHCP hands out IP addresses in a specified range xxx.xxx.xxx.1 - 255. the > range can be restricted, say xxx.xxx.xxx.100 - 200. > and/or the DHCP server can hand out specific IP addresses to specified MAC > address, and random to all others. > Where I was working, IT did all of this. > Servers, and other devices which required that IP address NOT change over > time, (requested to be fixed), were assigned in the range 1- 30, 31 - 220 > were for network attached devices (computers, tablets etc), and 220 - 254 > were for reserved for printers. > However, ALL addresses were assigned via DHCP - assigning a manual address > was not allowed because: > the DHC server did not know about it, and could/would hand out the manual IP > address to another device - creating a conflict. > > Just a note. DHCP with manual address must used a fixed up S far as I know or you will get conflicts with other machines > Hope this helps > > Chip > > >> Hi All, >> >> We have a built Client server v 16.x running on a MAC >> >> Network set up is >> DHCP with manual address >> >> This has been working till about 6n months ago. >> >> The hospital seems to test power outages on fairly regular basis. >> When they do change over to emergency power >> >> The network pane in system preferences loses all except the IP >> address and her we go >> >> The 4D server running starts listening on a different IP address. Has >> anyone ever seen this before. Tech support is telling me to switch to >> manual address. >> >> I have run and used this setup at many other customers >> >> Thanks and regards >> >> Chuck >> ------------------------------------------------------------------------------------------------ >> Chuck Miller Voice: (617) 739-0306 >> Informed Solutions, Inc. Fax: (617) 232-1064 >> mailto:cjmiller<AT SIGN>informed-solutions.com >> Brookline, MA 02446 USA Registered 4D Developer >> Providers of 4D and Sybase connectivity >> http://www.informed-solutions.com >> ------------------------------------------------------------------------------------------------ >> This message and any attached documents contain information which may >> be confidential, subject to privilege or exempt from disclosure under >> applicable law. These materials are intended only for the use of the >> intended recipient. If you are not the intended recipient of this >> transmission, you are hereby notified that any distribution, >> disclosure, printing, copying, storage, modification or the taking of >> any action in reliance upon this transmission is strictly >> prohibited. Delivery of this message to any person other than the >> intended recipient shall not compromise or waive such >> confidentiality, privilege or exemption from disclosure as to this >> communication. >> >> ********************************************************************** >> 4D Internet Users Group (4D iNUG) >> New Forum: https://discuss.4D.com >> Archive: http://lists.4d.com/archives.html >> Options: https://lists.4d.com/mailman/options/4d_tech >> Unsub: mailto:[email protected] >> ********************************************************************** > ------------ > Hell is other people > Jean-Paul Sartre ********************************************************************** 4D Internet Users Group (4D iNUG) New Forum: https://discuss.4D.com Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
