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<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
Hi Kevin,</div>
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<br>
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Thanks for your message! It was very helpful.</div>
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<br>
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I just tried to do host reservation with memfile and indeed it mostly worked.</div>
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<br>
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Multiple ether mapped to same IP is working as you said (with the understanding that one would have to released first).</div>
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<br>
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However, my experience with multiple IPv4 addresses to the same ether does not work, and you said that it should.</div>
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</div>
<div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">
I tried to reserve:</div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">hw-address: 78:24:af:45:32:99 with hostname test1 and ip <masked ip></span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">hw-address: as-above with hostname test1 and different ip</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><br>
</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">When running kea, it loads the first reservation, but after reading the second one,
it reports that this HW address has already been added so it can't be added again - thoughts?:</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><br>
</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">DHCP4_PARSER_FAIL failed to create or run parser for configuration element reservations:
failed to add new host using the HW address '78:24:af:45:32:99' to the IPv4 subnet id '0' as this host has already been added</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">DHCP4_CONFIG_LOAD_FAIL configuration error using file: /xconf/kea/kea-dhcp4.conf.fowl1, reason: failed to add
new host using the HW address '78:24:af:45:32:99' to the IPv4 subnet id '0' as this host has already been added</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">DHCP4_INIT_FAIL failed to initialize Kea server: configuration error using file '/xconf/kea/kea-dhcp4.conf.fowl1':
failed to add new host using the HW address '78:24:af:45:32:99' to the IPv4 subnet id '0' as this host has already been added</span></div>
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</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">Jason.</span><span style="font-family: monospace; font-size: 11pt; color: rgb(0, 0, 0);"><br>
</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Kea-users <kea-users-bounces@lists.isc.org> on behalf of Kevin P. Fleming <lists.kea-users@kevin.km6g.us><br>
<b>Sent:</b> Monday, November 13, 2023 8:07 PM<br>
<b>To:</b> kea-users@lists.isc.org <kea-users@lists.isc.org><br>
<b>Subject:</b> Re: [Kea-users] a few questions from a Kea newbie</font>
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<div class="PlainText">1) No, it is not necessary to use a database in order to use reservations.<br>
<br>
2) Unfortunately this is not currently possible unless you can ensure that the host releases its lease before switching interfaces. I have discussed this in a number of threads on this list and there is an open issue for it.<br>
<br>
3) Yes you can have multiple reservations for the same hardware address.<br>
<br>
On Mon, Nov 13, 2023, at 16:50, Jason Keltz wrote:<br>
> Hi.<br>
><br>
> I'm investigating migrating from ISC DHCPd to Kea and running into a few <br>
> issues.<br>
><br>
> I see some conflicting information online, due to kea development over <br>
> time, so I was hoping to ask here for some clarification.<br>
><br>
> 1) Is it really necessary to install a database backend such as <br>
> Postgres/MySQL if I want to have static host reservations? This was <br>
> working so perfectly with dhcpd without any db backend for such a long <br>
> time. Not having a DB backend on the DHCP server means one less thing <br>
> to worry about when Kea is updated, or the DB updated. I accept that <br>
> performance of the DB is likely going to be better than the reservations <br>
> being stored in a text file, but for my basic setup, it just doesn't <br>
> matter to me. The simplicity of not needing a DB for this over-rides the <br>
> performance gain that may be attained with a DB. I just want to be sure <br>
> that I haven't overlooked something.<br>
><br>
> 2) Does Kea permit multiple ethernet addresses mapped to the same IPv4 <br>
> IP? I do this for multiple reasons - for example, I may have a server <br>
> that has 2 ethernet addresses, and when I plug it in, whether I use one <br>
> or the other network port, the IP should be the same. Obviously I <br>
> shouldn't plug in both or things would break, but that would be my <br>
> problem. At the same time, maybe a laptop has an ethernet port built <br>
> in, but when plugged into a dock that has its own network port, I want <br>
> the machine to get the same IP one way or the other (static <br>
> reservation). Now, I think I can permit this by enabling <br>
> "ip-reservations-unique" to false, but I wanted to clarify. Again, I <br>
> did this with DHCPd all the time.<br>
><br>
> 3) Finally - does Kea permit multiple IPv4 IPs for the same ethernet <br>
> address? I believe that "ip-reservations-unique" does not permit this, <br>
> yet this is more important for me, and I did this with dhcpd. For <br>
> example, in different places in the building there are different VLANs. <br>
> Most hosts just get a static IP reservation from DHCP. 99% of hosts <br>
> will ever be on one VLAN. However, for say, my test laptop that has a <br>
> single IP reserved on every VLAN - can Kea handle this scenario?<br>
><br>
> Answers to these questions would be a great start!<br>
><br>
> Thanks for reading..<br>
><br>
> Jason.<br>
><br>
> -- <br>
> ISC funds the development of this software with paid support <br>
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><br>
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