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) 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. 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. 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. 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:4d_tech-unsubscr...@lists.4d.com > ********************************************************************** ------------ 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:4d_tech-unsubscr...@lists.4d.com **********************************************************************
