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Today's Topics:
1. Re: IP swapping for network restart or reboot for ubuntu
client (Kraishak Mahtha)
2. Re: IP swapping for network restart or reboot for ubuntu
client (Wayne Gemmell | Connect)
3. Re: IP swapping for network restart or reboot for ubuntu
client (perl-list)
----------------------------------------------------------------------
Message: 1
Date: Tue, 14 Jun 2022 19:10:32 +0530
From: Kraishak Mahtha <kraishak....@gmail.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: IP swapping for network restart or reboot for ubuntu
client
Message-ID:
<caddat86f0ssgzwc-9fh3z71shky3z3pzro5vsrtjay4wvx1...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi Wayne,
Thanks for sharing the link,
I have observed that I am seeing this IP switch only if it is in a
primary-failover mode whereas if we run the DHCP server standalone we do
not see any issue and the IP is being constant, by any chance did you try
this case
On Tue, Jun 14, 2022 at 2:56 PM Kraishak Mahtha <kraishak....@gmail.com>
wrote:
> * Observed in the Ubuntu version 20.04
>
> On Tue, Jun 14, 2022 at 2:39 PM Kraishak Mahtha <kraishak....@gmail.com>
> wrote:
>
>> Hi all,
>> We are experiencing weird behavior with ISC's DHCP version 4.4.2. When
>> the Wintel(windows) clients use the ISC DHCP servers that are operating in
>> a primary-failover mode, then reboot or a renewal does not see any address
>> shuffle. When the Ubuntu clients use the ISC DHCP servers, we are observing
>> a periodic IP Address shuffle upon a reboot. This shuffling is not observed
>> when we are using a Microsoft DHCP solution. We are interested to know if
>> this issue is a known issue in the ISC database. If there is a workaround
>> to resolve this issue, please let us know.
>>
>> Thanks in Advance
>>
>
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Message: 2
Date: Tue, 14 Jun 2022 15:50:00 +0200
From: "Wayne Gemmell | Connect" <wa...@connect-mobile.co.za>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: IP swapping for network restart or reboot for ubuntu
client
Message-ID:
<CAFK6eitTjzAkvYensaa26Bry-TqbAbv8J3i-D=bq-+182_y...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
We do run a primary fail-over setup and haven't tested it again as a
standalone host.
On Tue, 14 Jun 2022 at 15:41, Kraishak Mahtha <kraishak....@gmail.com>
wrote:
> Hi Wayne,
>
> Thanks for sharing the link,
>
> I have observed that I am seeing this IP switch only if it is in a
> primary-failover mode whereas if we run the DHCP server standalone we do
> not see any issue and the IP is being constant, by any chance did you try
> this case
>
> On Tue, Jun 14, 2022 at 2:56 PM Kraishak Mahtha <kraishak....@gmail.com>
> wrote:
>
>> * Observed in the Ubuntu version 20.04
>>
>> On Tue, Jun 14, 2022 at 2:39 PM Kraishak Mahtha <kraishak....@gmail.com>
>> wrote:
>>
>>> Hi all,
>>> We are experiencing weird behavior with ISC's DHCP version 4.4.2. When
>>> the Wintel(windows) clients use the ISC DHCP servers that are operating in
>>> a primary-failover mode, then reboot or a renewal does not see any address
>>> shuffle. When the Ubuntu clients use the ISC DHCP servers, we are observing
>>> a periodic IP Address shuffle upon a reboot. This shuffling is not observed
>>> when we are using a Microsoft DHCP solution. We are interested to know if
>>> this issue is a known issue in the ISC database. If there is a workaround
>>> to resolve this issue, please let us know.
>>>
>>> Thanks in Advance
>>>
>> --
> ISC funds the development of this software with paid support
> subscriptions. Contact us at https://www.isc.org/contact/ for more
> information.
>
> dhcp-users mailing list
> dhcp-users@lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
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------------------------------
Message: 3
Date: Tue, 14 Jun 2022 09:56:36 -0400 (EDT)
From: perl-list <perl-l...@network1.net>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: IP swapping for network restart or reboot for ubuntu
client
Message-ID:
<1961644838.2639026.1655214996089.javamail.zim...@network1.net>
Content-Type: text/plain; charset=utf-8
Is this by chance in conjunction with Cisco's DHCP Proxy configuration? What
we saw there was that the Cisco device inserted a RELEASE whenever a DISCOVER
happened. The RELEASE was so close (< 5ms) on top of the subsequent DISCOVER
that the DHCP server, in failover, did not have time to propagate the address
being freed up and so a second address would be configured. We had to get
Cisco to insert a delay between the RELEASE and the DISCOVER of some length
(though I don't remember the details).
----- Original Message -----
> From: "Wayne Gemmell | Connect" <wa...@connect-mobile.co.za>
> To: "Users of ISC DHCP" <dhcp-users@lists.isc.org>
> Sent: Tuesday, June 14, 2022 9:50:00 AM
> Subject: Re: IP swapping for network restart or reboot for ubuntu client
> We do run a primary fail-over setup and haven't tested it again as a
> standalone
> host.
> On Tue, 14 Jun 2022 at 15:41, Kraishak Mahtha < [
> mailto:kraishak....@gmail.com
> | kraishak....@gmail.com ] > wrote:
>> Hi Wayne,
>> Thanks for sharing the link,
>> I have observed that I am seeing this IP switch only if it is in a
>> primary-failover mode whereas if we run the DHCP server standalone we do not
>> see any issue and the IP is being constant, by any chance did you try this
>> case
>> On Tue, Jun 14, 2022 at 2:56 PM Kraishak Mahtha < [
>> mailto:kraishak....@gmail.com | kraishak....@gmail.com ] > wrote:
>>> * Observed in the Ubuntu version 20.04
>>> On Tue, Jun 14, 2022 at 2:39 PM Kraishak Mahtha < [
>>> mailto:kraishak....@gmail.com | kraishak....@gmail.com ] > wrote:
>>>> Hi all,
>>>> We are experiencing weird behavior with ISC's DHCP version 4.4.2. When the
>>>> Wintel(windows) clients use the ISC DHCP servers that are operating in a
>>>> primary-failover mode, then reboot or a renewal does not see any address
>>>> shuffle. When the Ubuntu clients use the ISC DHCP servers, we are
>>>> observing a
>>>> periodic IP Address shuffle upon a reboot. This shuffling is not observed
>>>> when
>>>> we are using a Microsoft DHCP solution. We are interested to know if this
>>>> issue
>>>> is a known issue in the ISC database. If there is a workaround to resolve
>>>> this
>>>> issue, please let us know.
>>>> Thanks in Advance
>> --
>> ISC funds the development of this software with paid support subscriptions.
>> Contact us at [ https://www.isc.org/contact/ | https://www.isc.org/contact/ ]
>> for more information.
>> dhcp-users mailing list
>> [ mailto:dhcp-users@lists.isc.org | dhcp-users@lists.isc.org ]
>> [ https://lists.isc.org/mailman/listinfo/dhcp-users |
>> https://lists.isc.org/mailman/listinfo/dhcp-users ]
> --
> ISC funds the development of this software with paid support subscriptions.
> Contact us at https://www.isc.org/contact/ for more information.
> dhcp-users mailing list
> dhcp-users@lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
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