Send dhcp-users mailing list submissions to
dhcp-users@lists.isc.org
To subscribe or unsubscribe via the World Wide Web, visit
https://lists.isc.org/mailman/listinfo/dhcp-users
or, via email, send a message with subject or body 'help' to
dhcp-users-requ...@lists.isc.org
You can reach the person managing the list at
dhcp-users-ow...@lists.isc.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of dhcp-users digest..."
Today's Topics:
1. Re: Getting Peer hold all free leases (Simon)
2. Re: Getting Peer hold all free leases (perl-list)
3. Re: Getting Peer hold all free leases (Abdul Khader)
4. Re: Getting Peer hold all free leases (Bob Harold)
----------------------------------------------------------------------
Message: 1
Date: Tue, 17 Aug 2021 14:26:30 +0100
From: Simon <dh...@thehobsons.co.uk>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID: <d012c8c7-cd2c-4a32-8e68-2b9167dae...@thehobsons.co.uk>
Content-Type: text/plain; charset=utf-8
Kraishak Mahtha <kraishak....@gmail.com> wrote:
> On the primary log it shows as : total 50 free 0 backup 0
> Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ, answering
> negatively! Peer may be out of leases or database inconsistent.
>
> but in the failover log it shows as
> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
> total 50 free 50 backup 0 lts -25 max-own (+/-)5 (requesting peer
> rebalance!)
> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24
> total 50 free 50 backup 0 lts -25 max-misbal 8
> pool response: 0 leases
>
> because of some reason the pool is not getting balanced between the primary
> and failover
Caveat that I?ve not used failover myself ?
Might also be worth having a look at the two leases files and check that they
look normal. Does the secondary have any leases recorded as belonging to the
primary ?
After that, I would suggest :
shut down one server (A)
put the other (B) into partner-down state
restart (B) to clear anything that might be "messed up" in memory/internal
state
move the leases file of the shut down server (A) and create a new empty one
start up the server (A)
The server with the cleared out leases file should then pull a copy fo the
leases file from it?s partner and they should go into sync. I?d suggest that
you clear the secondary on the basis that it appears to be saying it has no
current leases while the primary appears to think that it has no free leases.
If things appear to sort themselves out, how many leases appear to be in use ?
If there?s nothing free then you will need to expand the pool.
Simon
------------------------------
Message: 2
Date: Tue, 17 Aug 2021 09:50:00 -0400 (EDT)
From: perl-list <perl-l...@network1.net>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID:
<88512779.840613.1629208200215.javamail.zim...@network1.net>
Content-Type: text/plain; charset=utf-8
Be sure and do the secondary server. The primary will allocate leases while
the secondary is in recover state. The reverse is not true, in my experience.
Never clear the leases file from the primary if you can avoid it.
----- Original Message -----
> From: "Simon" <dh...@thehobsons.co.uk>
> To: "Users of ISC DHCP" <dhcp-users@lists.isc.org>
> Sent: Tuesday, August 17, 2021 9:26:30 AM
> Subject: Re: Getting Peer hold all free leases
> Kraishak Mahtha <kraishak....@gmail.com> wrote:
> > On the primary log it shows as : total 50 free 0 backup 0
>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ, answering
> > negatively! Peer may be out of leases or database inconsistent.
> > but in the failover log it shows as
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
>> total
> > 50 free 50 backup 0 lts -25 max-own (+/-)5 (requesting peer rebalance!)
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24
>> total 50
> > free 50 backup 0 lts -25 max-misbal 8
> > pool response: 0 leases
>> because of some reason the pool is not getting balanced between the primary
>> and
> > failover
> Caveat that I?ve not used failover myself ?
> Might also be worth having a look at the two leases files and check that they
> look normal. Does the secondary have any leases recorded as belonging to the
> primary ?
> After that, I would suggest :
> shut down one server (A)
> put the other (B) into partner-down state
> restart (B) to clear anything that might be "messed up" in memory/internal
> state
> move the leases file of the shut down server (A) and create a new empty one
> start up the server (A)
> The server with the cleared out leases file should then pull a copy fo the
> leases file from it?s partner and they should go into sync. I?d suggest that
> you clear the secondary on the basis that it appears to be saying it has no
> current leases while the primary appears to think that it has no free leases.
> If things appear to sort themselves out, how many leases appear to be in use ?
> If there?s nothing free then you will need to expand the pool.
> Simon
> _______________________________________________
> 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
------------------------------
Message: 3
Date: Tue, 17 Aug 2021 17:56:46 +0400
From: Abdul Khader <akha...@gmail.com>
To: Kraishak Mahtha <kraishak....@gmail.com>
Cc: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID:
<CAEqAb27QiA3G1-8u8OUa9H3ynN2oceDWSwzrmO_ST=n-xev...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi Kraishak
Check the communication is happening on port 647 on both the servers using
tcpdump -i any port 647
Please also check if there are multiple entries my state and partner state.
Feel both the servers are not in sync. Can you also check if the discovers
from client is landing on both the servers ? If you are using split 128
then the traffic should land on both the Nodes. Check your ip helper
(relay) to make sure it's configured to send to both the Nodes.
Regards
On Tue, 17 Aug 2021, 17:11 Kraishak Mahtha, <kraishak....@gmail.com> wrote:
> Hi Abdul Khader,
>
> I have declared as follows:
>
> Configuration file from primary
> =========================
> failover peer "peer-host" {
> primary;
> address 192.168.56.156;
> port 647;
> peer address 192.168.56.178;
> peer port 647;
> max-response-delay 30;
> max-unacked-updates 30;
> load balance max seconds 3;
> mclt 1800;
> split 128;
> }
> subnet 192.168.56.0 netmask 255.255.255.0 {
> pool {
> failover peer "peer-host";
> range 192.168.56.5 192.168.56.54;
> }
> option domain-name "test.com";
> option routers 192.168.56.1;
> option subnet-mask 255.255.255.0;
> }
>
> Configuration file from failover
> ======================
> failover peer "peer-host" {
> secondary;
> address 192.168.56.178;
> port 647;
> peer address 192.168.56.156;
> peer port 647;
> max-response-delay 30;
> max-unacked-updates 30;
> load balance max seconds 3;
> }
> subnet 192.168.56.0 netmask 255.255.255.0 {
> pool {
> failover peer "peer-host";
> range 192.168.56.5 192.168.56.54;
> }
> option domain-name "test.com";
> option routers 192.168.56.1;
> option subnet-mask 255.255.255.0;
> }
>
> On the primary log it shows as :* total 50 free 0 backup 0*
> *Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ,
> answering negatively! Peer may be out of leases or database inconsistent.*
>
> but in the failover log it shows as
> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
> *total
> 50 free 50 backup 0 lts -25 max-own (+/-)5 * (requesting peer
> rebalance!)
> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24 total
> 50 free 50 backup 0 lts -25 max-misbal 8
> pool response: 0 leases
>
> because of some reason the pool is not getting balanced between the
> primary and failover
>
>
> Also I have a problem in tracking my thread previously from
> *http://isc-dhcp-users
> <http://isc-dhcp-users>* link I used to track and reply but now it is not
> working, and tried searching the other links I found this
> *https://lists.isc.org/pipermail/dhcp-users/
> <https://lists.isc.org/pipermail/dhcp-users/> *to track but I cannot see
> a reply option in that web page
>
>
>
> On Tue, Aug 17, 2021 at 5:41 PM Kraishak Mahtha <kraishak....@gmail.com>
> wrote:
>
>> Hi,
>> I am using ISC DHCP in primary and failover mode and I am getting issue
>> that clients are not getting leases and when I checked for the service logs
>> I see as
>> Primary Logs:
>> ==========
>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: balancing pool f6f5f0 192.168.56.0/24
>> total 50 free 0 backup 0 lts 0 max-own (+/-)0
>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: balanced pool f6f5f0 192.168.56.0/24
>> total 50 free 0 backup 0 lts 0 max-misbal 0
>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ,
>> answering negatively! Peer may be out of leases or database inconsistent.
>>
>> Failover Logs
>> ==========
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
>> total 50 free 50 backup 0 lts -25 max-own (+/-)5 (requesting peer
>> rebalance!)
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24
>> total 50 free 50 backup 0 lts -25 max-misbal 8
>> pool response: 0 leases
>>
>> I tried searching the forums and many of them suggested that there might
>> be inconsistency between the configuration file and leases database, I
>> cross verified the configs they are good and regarding the leases file can
>> we manually do any operation to make them in sync ?
>>
>> I tried checking the status of the primary and failover in the lease file
>> but they are in normal-normal,
>> cat dhcpd.leases | egrep "my state|partner state" | tail -2
>> my state normal at 2 2021/08/17 16:41:09;
>> partner state normal at 2 2021/08/17 17:01:17;
>>
>> Has anyone faced a similar issue/Any suggestions of how to fix the issue,
>> Can we manually send requests for the DHCP service to do the pool balance
>> and sync the leases for that specific subnet ?
>>
>>
>> Any help/suggestion would be much appreciated
>> Thanks
>> Kraishak
>>
>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20210817/fe01a40b/attachment-0001.htm>
------------------------------
Message: 4
Date: Tue, 17 Aug 2021 10:09:21 -0400
From: Bob Harold <rharo...@umich.edu>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Cc: Kraishak Mahtha <kraishak....@gmail.com>
Subject: Re: Getting Peer hold all free leases
Message-ID:
<ca+nkc8cwsumh882a0wszkk54snfimy+hvbvxfjcre7pdtak...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
With lots of subnets, all using failover, I see this error fairly often. I
am using a vendor IPAM solution, so my fix is to remove the failover server
from the subnet config, push out new dhcpd.conf files, then put it back and
push again. Under the covers, that actually does:
- Remove the subnet completely from the second server, and reload dhcpd.
The server will drop all the leases for that subnet since the subnet is
gone.
- Remove the "failover" line for that subnet on the primary server and
reload dhcp.
- Add the failover line back in and reload the primary.
- Add the subnet to the secondary again.
That is what works for me.
--
Bob Harold
DNS and DHCP Hostmaster - UMNet
Information and Technology Services (ITS)
rharo...@umich.edu
On Tue, Aug 17, 2021 at 9:57 AM Abdul Khader <akha...@gmail.com> wrote:
> Hi Kraishak
> Check the communication is happening on port 647 on both the servers using
> tcpdump -i any port 647
> Please also check if there are multiple entries my state and partner
> state. Feel both the servers are not in sync. Can you also check if the
> discovers from client is landing on both the servers ? If you are using
> split 128 then the traffic should land on both the Nodes. Check your ip
> helper (relay) to make sure it's configured to send to both the Nodes.
>
> Regards
>
>
> On Tue, 17 Aug 2021, 17:11 Kraishak Mahtha, <kraishak....@gmail.com>
> wrote:
>
>> Hi Abdul Khader,
>>
>> I have declared as follows:
>>
>> Configuration file from primary
>> =========================
>> failover peer "peer-host" {
>> primary;
>> address 192.168.56.156;
>> port 647;
>> peer address 192.168.56.178;
>> peer port 647;
>> max-response-delay 30;
>> max-unacked-updates 30;
>> load balance max seconds 3;
>> mclt 1800;
>> split 128;
>> }
>> subnet 192.168.56.0 netmask 255.255.255.0 {
>> pool {
>> failover peer "peer-host";
>> range 192.168.56.5 192.168.56.54;
>> }
>> option domain-name "test.com";
>> option routers 192.168.56.1;
>> option subnet-mask 255.255.255.0;
>> }
>>
>> Configuration file from failover
>> ======================
>> failover peer "peer-host" {
>> secondary;
>> address 192.168.56.178;
>> port 647;
>> peer address 192.168.56.156;
>> peer port 647;
>> max-response-delay 30;
>> max-unacked-updates 30;
>> load balance max seconds 3;
>> }
>> subnet 192.168.56.0 netmask 255.255.255.0 {
>> pool {
>> failover peer "peer-host";
>> range 192.168.56.5 192.168.56.54;
>> }
>> option domain-name "test.com";
>> option routers 192.168.56.1;
>> option subnet-mask 255.255.255.0;
>> }
>>
>> On the primary log it shows as :* total 50 free 0 backup 0*
>> *Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ,
>> answering negatively! Peer may be out of leases or database inconsistent.*
>>
>> but in the failover log it shows as
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
>> *total 50 free 50 backup 0 lts -25 max-own (+/-)5 * (requesting
>> peer rebalance!)
>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24
>> total
>> 50 free 50 backup 0 lts -25 max-misbal 8
>> pool response: 0 leases
>>
>> because of some reason the pool is not getting balanced between the
>> primary and failover
>>
>>
>> Also I have a problem in tracking my thread previously from
>> *http://isc-dhcp-users
>> <http://isc-dhcp-users>* link I used to track and reply but now it is
>> not working, and tried searching the other links I found this
>> *https://lists.isc.org/pipermail/dhcp-users/
>> <https://lists.isc.org/pipermail/dhcp-users/> *to track but I cannot see
>> a reply option in that web page
>>
>>
>>
>> On Tue, Aug 17, 2021 at 5:41 PM Kraishak Mahtha <kraishak....@gmail.com>
>> wrote:
>>
>>> Hi,
>>> I am using ISC DHCP in primary and failover mode and I am getting issue
>>> that clients are not getting leases and when I checked for the service logs
>>> I see as
>>> Primary Logs:
>>> ==========
>>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: balancing pool f6f5f0
>>> 192.168.56.0/24 total 50 free 0 backup 0 lts 0 max-own (+/-)0
>>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: balanced pool f6f5f0 192.168.56.0/24
>>> total 50 free 0 backup 0 lts 0 max-misbal 0
>>> Aug 17 17:15:48 dhcp1 dhcpd[12130]: peer peer-host: Got POOLREQ,
>>> answering negatively! Peer may be out of leases or database inconsistent.
>>>
>>> Failover Logs
>>> ==========
>>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balancing pool bf05b0 192.168.56.0/24
>>> total 50 free 50 backup 0 lts -25 max-own (+/-)5 (requesting peer
>>> rebalance!)
>>> Aug 17 17:14:48 dhcp2 dhcpd[1902]: balanced pool bf05b0 192.168.56.0/24
>>> total 50 free 50 backup 0 lts -25 max-misbal 8
>>> pool response: 0 leases
>>>
>>> I tried searching the forums and many of them suggested that there might
>>> be inconsistency between the configuration file and leases database, I
>>> cross verified the configs they are good and regarding the leases file can
>>> we manually do any operation to make them in sync ?
>>>
>>> I tried checking the status of the primary and failover in the lease
>>> file but they are in normal-normal,
>>> cat dhcpd.leases | egrep "my state|partner state" | tail -2
>>> my state normal at 2 2021/08/17 16:41:09;
>>> partner state normal at 2 2021/08/17 17:01:17;
>>>
>>> Has anyone faced a similar issue/Any suggestions of how to fix the
>>> issue,
>>> Can we manually send requests for the DHCP service to do the pool
>>> balance and sync the leases for that specific subnet ?
>>>
>>>
>>> Any help/suggestion would be much appreciated
>>> Thanks
>>> Kraishak
>>>
>>>
>>> _______________________________________________
> 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.isc.org/pipermail/dhcp-users/attachments/20210817/381c7a82/attachment.htm>
------------------------------
Subject: Digest Footer
_______________________________________________
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
------------------------------
End of dhcp-users Digest, Vol 154, Issue 3
******************************************
