I discovered the sipcalc command to make my life a little easier when determining IP address ranges, netmasks, and potential gateway addresses. And, unfortunately, DHCP servers dole out addresses on a first-come, first-served basis without regard for who's (or what's) getting those addresses. I received far too many calls and tickets describing problems that weren't all that easy to troubleshoot until I figured out that I'd run out of IP addresses. You can see that my 254 address wouldn't cover everyone's PCs plus their phones and accommodate my other required devices. I'd forgotten that everyone has a phone that they connected to WiFi. I had the ridiculous notion that 254 addresses would be sufficient for 130 or so employees, 30 servers, 10 printers, two routers, 10 wireless access points, and a few other random devices in each of our two locations. Since everything has an IP address these days, my DHCP server was running out of IP addresses, and I had to do something easy to relieve the situation. ![]() I guess some people just need a space in which to air their grievances about everything. I knew little about this address space, and it was frustrating to try to search for the simple information that I needed without scrolling through forums with all the idle chatter and off-topic rhetoric. How well do you know Linux? Take a quiz and get a badge.Linux system administration skills assessment. ![]() A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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