[Dnsmasq-discuss] client q: both static and dhcp
stappers at stappers.nl
Sun Jun 27 07:44:15 UTC 2021
> These machines are portable.
On Sun, Jun 27, 2021 at 01:26:24AM -0500, Carl Karsten wrote:
> On Sun, Jun 27, 2021 at 12:03 AM Dominik <dl6er at dl6er.de> wrote:
> > Hey Carl,
> > On Sat, 2021-06-26 at 19:16 -0500, Carl Karsten wrote:
> > > I'm looking for advice on haveing some boxes to have both dynamic and
> > > static IPs.
> > Why use a static IP at all? We have often enough seen people use static
> > addresses for the wrong reasons.
> > Consider using only DHCP and
> > (a) use a hostname to access the device. In the end, memorizing some-
> > service.lan is more reliable than 192.168.1.149. You may think
> > differently, but let's see what you say after not having logged into
> > the box for half a year - do you still know the address without looking
> > it up? However, you may still recall a good hostname.
> > (b) use a deterministic DHCP server like dnsmasq. It always tries to
> > assign the same IP addresses to the same devices (instead of numbering
> > them sequentially based on their appearance like cheap routers often
> > do).
> > Using (a), (b) or (a)+(b) doesn't require you to have a static IP at
> > all.
> These machines are portable. they will likely start out on a lan where I
> control the dhcp server; the os apps and config are setup, then they are
> moved to another room. They live there for a few days to a week, and then
> are put back in storage, with a few being left out for R&D to experiment
> There isn't always a dhcp server on the network.
There is the true problem.
And that problem implies manual assignment of IPv4 addresses
plus setting router and most likely DNS (or even worse: At N servers
updating N entries in /etc/hosts)
> Sometimes there isn't even a network with the exception of a single
> run of cat 5 between 2 machines.
> This is what is going on:
> Sometimes there isn't a link to "DHCP – Gigabit feed out" (thus there is no
> live stream, just recording to local disk)
> This is what I want the static IP for:
> The "Opsis PC" has a systemd script that connects to "Voctomix PC"
> The script uses a hostname, the hostname is set in /etc/hosts
> If there is a network with dhcp, then it will be nice to get the gateway
> and be able to ssh into machines.
I recommend to add an OpenWRT device or another portable DHCP server + DNServer
to the equipment.
> > Best,
> > Dominik
> Carl K
 Acknowlegde on "Allow me my ignorance"
Please do go beyond that and reply below previous text.
Do it for your future self that will be visiting the mailinglist archive.
Silence is hard to parse
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