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Today's Topics:
1. Re: Move dhcp lease to new ip+reservation. How? (Gregory Sloop)
2. Re: Move dhcp lease to new ip+reservation. How? (Simon)
3. Re: Move dhcp lease to new ip+reservation. How? (Gregory Sloop)
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Message: 1
Date: Fri, 27 Aug 2021 09:35:28 -0700
From: Gregory Sloop <gr...@sloop.net>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Move dhcp lease to new ip+reservation. How?
Message-ID: <129744849.20210827093...@sloop.net>
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I like this approach best, since it's kind of where I started heading as I
thought about it.?
(Though Glenn's also has promise. Thanks to you both!)
?
However, I've kind of struggled at knowing exactly what OMAPI commands to use
to create the skeleton lease (What I've tried doesn't work) and what, exactly,
to do to "expire" the "old" lease. (There doesn't appear to be any way
to?remove the lease - it looks like all you can do is expire it. (Though I'm
not sure if setting the end-time to 0, or something else is the "way" to do it.)
Simon - if you have scripts I could look at, it would be very handy - or at
least tell me what attributes you set (and to what).
OMAPI and I don't get on very well. (I feel like a bumbling fool any time I try
to figure out how to do anything in it.)
?
TIA!
?
> Gregory Sloop <gr...@sloop.net> wrote:
>> I've thought about pre-creating leases for 51-70 and essentially adding
>> "bogus" information for those leases and reserving them. (While allowing
>> unknown-clients for the 51-70 pool - but since they're all "taken" it won't
>> hand one out), ?Then when I want to move something there, I can remove the
>> "bogus" reservation and move the "real" lease to the appropriate IP in the
>> 51-70 block/pool.
> That?s what I?ve done for a small pool I?ve created at home for some devices
> - I wanted to segregate (isolate) some IoT stuff that others insist on having
> in the house.
> When you move the device, as well as assigning it to the reserved lease
> (which as you?ve probably realised, only initially needs to be a skeleton
> entry with MAC, IP, and the reserved flag), you need to remove it?s other
> lease(s) to ensure that it changes address.
> I don?t run failover, so I don?t know what you?ll need to do in terms of
> making the two servers agree on the details - e.g. whether it?s enough to do
> it on one with OMAPI and it?ll get copied by the failover setup, or whether
> you have to do it to both servers separately.
> Simon
------------------------------
Message: 2
Date: Fri, 27 Aug 2021 17:53:27 +0100
From: Simon <dh...@thehobsons.co.uk>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Move dhcp lease to new ip+reservation. How?
Message-ID: <471e21e4-009e-4eaf-878a-ae6d5632f...@thehobsons.co.uk>
Content-Type: text/plain; charset=utf-8
Gregory Sloop <gr...@sloop.net> wrote:
> However, I've kind of struggled at knowing exactly what OMAPI commands to use
> to create the skeleton lease (What I've tried doesn't work) and what,
> exactly, to do to "expire" the "old" lease. (There doesn't appear to be any
> way to remove the lease - it looks like all you can do is expire it. (Though
> I'm not sure if setting the end-time to 0, or something else is the "way" to
> do it.)
>
> Simon - if you have scripts I could look at, it would be very handy - or at
> least tell me what attributes you set (and to what).
> OMAPI and I don't get on very well. (I feel like a bumbling fool any time I
> try to figure out how to do anything in it.)
I just stop the server and edit the leases file - I only run a home server
these days. I never did run anything ?big enough? that I needed to do online
maintenance and never used OMAPI.
All you need to create for a skeleton lease is (from memory) :
lease {
hardware 1:xx......;
address 192.168....;
reserved;
}
The server will fill in the rest as it goes.
Simon
------------------------------
Message: 3
Date: Fri, 27 Aug 2021 10:06:37 -0700
From: Gregory Sloop <gr...@sloop.net>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Move dhcp lease to new ip+reservation. How?
Message-ID: <335243988.20210827100...@sloop.net>
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-------------- next part --------------
?
> Gregory Sloop <gr...@sloop.net> wrote:
>> However, I've kind of struggled at knowing exactly what OMAPI commands to
>> use to create the skeleton lease (What I've tried doesn't work) and what,
>> exactly, to do to "expire" the "old" lease. (There doesn't appear to be any
>> way to remove the lease - it looks like all you can do is expire it. (Though
>> I'm not sure if setting the end-time to 0, or something else is the "way" to
>> do it.)
>> Simon - if you have scripts I could look at, it would be very handy - or at
>> least tell me what attributes you set (and to what).
>> OMAPI and I don't get on very well. (I feel like a bumbling fool any time I
>> try to figure out how to do anything in it.)
> I just stop the server and edit the leases file - I only run a home server
> these days. I never did run anything ?big enough? that I needed to do online
> maintenance and never used OMAPI.
> All you need to create for a skeleton lease is (from memory) :
> lease {
> ? hardware 1:xx......;
> ? address 192.168....;
> ? reserved;
> }
Ah. Bummer. In this case, we've got perhaps 400+ devices on the network getting
leases and using fail-over.
?
Stopping and editing the leases file isn't much of an option - especially since
operating hours are pretty wide. (Doing it occasionally would work, but I'd
like a way I can do this maintence during a regular operating day, instead of
4a in the morning.)
?
I guess I'll just setup a VM here and test against a test server and poke/prod
until I think I've got it figure out. I've been playing with the production
server, which is a little scary.
?
Can anyone confirm that you _can_ create a new empty lease (like above) with
OMAPI?
(I should have kept better track of my searches on the topic. I know I've seen
people claiming they've successfully expired a lease, but I'm not sure I've
seen any where they are creating new leases.)
?
Thanks again!
?
-Greg
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