About 4 years ago I ran into some trouble with a bunch of assholes from on IRC who harrassed me for a while. Problem solved. They are probably leased out for days at a time, so you will get the same one. I don't think all DHCP queries are pass through to some DHCP server somewhere, since even if my connection is down, a machine booted on my local machine will get a DHCP address in the correct address space, as long as the modem was up prior to the connection failing.
Just for the record, RoadRunner does not offer static IPs. Ok you would need to change your host mask. That said in order to change your ip you can change nics or let the lease expire. Or call roadrunner and tell them that you get intermittent connection to your modem and think you are being hardcoded because your ip is pingable sometimes when the node is shut down.
Release and renew somtimes doesn't work, but i have turned off my modem for a day after doing a release, and i had a diff ip when turned it back on. The least intrusive way to do it is to look at how long the lease time for your DHCP granted IP address is, and leave your PC off for that amount of time. Power it up after that amount of time and tada, you should have a new IP.
This of course, assumes that your cable company is using DHCP, which, most likely, they are. That is going to be the time until you need to keep your pc off and disconnected from the cable network until you can power it up again and the process should give you a new semirandomly chosen IP.
Some in this forum may know that I work for a cable company, and am responsible for administering servers and whatnot that do exactly this. Good luck! MAC addresses aren't visible across routers. However, advanced users and businesses might benefit from a static IP address. A static IP address is useful for hosting servers or websites and for sharing large files. Advanced remote support tools are used to fix issues on any of your devices.
The service includes support for the following:. Thank You Thank you for taking the time to respond. Rating Submitted Do you have a suggestion for improving this article? Characters Left : Submit Cancel. Unlock better coverage and superior speeds with WiFi 6. After reading over your five things to do with a new router article , I was poking around in the control panel of my router. One of the things I found among all the settings is a table to set static IP addresses.
Should I be using it? The vasty majority of modern computer networks, including the little network in your home controlled by your router, use DHCP Dynamic Host Configuration Protocol.
DHCP is a protocol that automatically assigns a new device an IP address from the pool of available IP addresses without any interaction from the user or a system administrator. Imagine that a friend visits with their iPad.
They want to get on your network and update some apps on the iPad. With DHCP, however, life is so much easier. For most applications, like adding mobile devices to your network, general computer use, video game consoles, etc.
Although DHCP is really great and makes our lives easier, there are situations where using a manually assigned static IP address is quite handy. You need reliable name resolution on your network for computers that need to be consistently and accurately found.
Any time you rely on a computer or a piece of software to accurately and immediately locate another computer on your network as is the case with our XBMC example — the client devices need to find the media server hosting the material with the least chance of error, assigning a static IP address is the way to go.
Direct IP-based resolution remains the most stable and error free method of communicating on a network. You want to impose a human-friendly numbering scheme onto your network devices. If you have devices on your network that you regularly access using command line tools or other IP-oriented applications, it can be really useful to assignment permanent addresses to those devices in a scheme that is friendly to the human memory. For example, if left to its own devices our router would assign any available address to our three Raspberry Pi XBMC units.
Because we frequently tinker with those units and access them by their IP addresses, it made sense to permanently assign addresses to them that would be logical and easy to remember:. You have an application the expressly relies on IP addresses. Some applications will only allow you to supple an IP address to refer to other computers on the network.
In such cases it would be extremely annoying to have to change the IP address in the application every time the IP address of the remote computer was changed in the DHCP table. Assigning a permanent address to the remote computer prevents you from the hassle of frequently updating your applications. First, check what the IP pool available on your router is. Your router will have a total pool and a pool specifically reserved for DHCP assignments. The total pool available to home routers is typically Then, within those ranges a smaller pool is reserved for the DHCP server, typically around addresses in a range like Once you know the general pool, you should use the following rules to assign static IP addresses:.
Some people prefer to only use addresses outside of the DHCP range e.
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