DHCP server will check to make sure an address is not in use use before allocating an address but best practice is still to set dhcp to give out say 90 addresses (are you really likely to need more?) And then set statics starting at 101. I would also use something like Google sheets as an ipam to record what you put where so if you disconnect something for a couple of years you don't have to play hunt the arp to find it (or discover it's been reused)
On 12 Oct 2016 13:00, <peterboro-requ...@mailman.lug.org.uk> wrote: > Send Peterboro mailing list submissions to > peterboro@mailman.lug.org.uk > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.lug.org.uk/mailman/listinfo/peterboro > or, via email, send a message with subject or body 'help' to > peterboro-requ...@mailman.lug.org.uk > > You can reach the person managing the list at > peterboro-ow...@mailman.lug.org.uk > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Peterboro digest..." > > > Today's Topics: > > 1. Re: Slightly off topic but would value advice (Phil Thompson) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 11 Oct 2016 13:17:49 +0000 > From: Phil Thompson <p...@yarwell.demon.co.uk> > To: Edward Kerr <e.k...@plumbline.org.uk>, "Peterborough LUG - No > commercial posts" <peterboro@mailman.lug.org.uk> > Subject: Re: [Peterboro] Slightly off topic but would value advice > Message-ID: > <AM3PR04MB0677B3AE0481BAF0C5C1290FCEDA0@AM3PR04MB0677. > eurprd04.prod.outlook.com> > > Content-Type: text/plain; charset="us-ascii" > > > ________________________________________ > From: Peterboro [peterboro-boun...@mailman.lug.org.uk] on behalf of > Edward Kerr via Peterboro [peterboro@mailman.lug.org.uk] > Sent: 03 October 2016 15:40 > > I have few items on my network that I have given fixed IP addresses using > Mac address binding on router. e.g. printer / NAS / TV Recorder/Netflix > etc. > > Currently I have allocated fixed IP address fairly randomly. The DHCP > addresses fit around these. > > My router allows me to start DHCP addresses at, say nnn.nnn.nnn.10 or > whatever I choose. Currently not enabled. > > Is it a good idea / good practice to set that value, and allocate fixed IP > addresses below that? I assume that the DHCP server will then allocate IP > addresses above that number!? > > ----------- > > I find it useful to put fixed IPs like printers at known places eg .200 or > .100 and it makes sense to keep the DHCP range out of the way of those. > > That way you know instantly if it's a fixed device or a DHCP one from the > address. > > > ----------- > > If so, if I make the changes, is it wise to turn off all connected > equipment except for the machine accessing the router, make the changes, > then turn them all on again? > > And will I have to force my Mac to find its new IP address? Preference > > network > advanced > Renew DHCP lease (Or reboot!?) > > ----------- > > anything that's on and has an IP address outside the new DHCP range will > keep it until renewed, so I don't think it's a big deal either way. > > > Phil > > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Peterboro mailing list > Peterboro@mailman.lug.org.uk > https://mailman.lug.org.uk/mailman/listinfo/peterboro > > ------------------------------ > > End of Peterboro Digest, Vol 535, Issue 1 > ***************************************** >
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