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Today's Topics:
1. Re: Getting Peer hold all free leases (Kraishak Mahtha)
2. Re: Getting Peer hold all free leases (glenn.satch...@uniq.com.au)
3. Re: Getting Peer hold all free leases (Kraishak Mahtha)
----------------------------------------------------------------------
Message: 1
Date: Wed, 18 Aug 2021 10:51:11 +0530
From: Kraishak Mahtha <kraishak....@gmail.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID:
<caddat8435tjbb4xkqk7gv60jvj_ypforpjtvbk-nkdbtufa...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Question to ISC Team,
Can we manually send a request for the DHCP server from externally to do
the pool balance for a specific subnet? or sent a force parameter in send
request to balance specific subnet
Thanks
Kraishak
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
>
>
>
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Message: 2
Date: Wed, 18 Aug 2021 15:44:49 +1000
From: glenn.satch...@uniq.com.au
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID: <546b35942dd858672529c18e9c470...@uniq.com.au>
Content-Type: text/plain; charset=US-ASCII; format=flowed
Hi Kraishak
Can you check on each dhcp server that you can reach the failover port
on the peer? eg:
on server1: telnet server2 <peer-port2>
on server2: telnet server1 <peer-port1>
where port and peer-port are set in the failover stanza of dhcpd.conf.
If this connects, ie is not blocked by any firewalls, etc, then
restarting one dhcp service should cause the pools to be balanced.
Could you post the failover clause from dhcpd.conf from both servers?
regards,
Glenn
On 2021-08-18 15:21, Kraishak Mahtha wrote:
> Question to ISC Team,
>
> Can we manually send a request for the DHCP server from externally to
> do the pool balance for a specific subnet? or sent a force parameter
> in send request to balance specific subnet
>
> Thanks
> Kraishak
>
> 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 [1] 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 [1] 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 [1] 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 [1] 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
>
>
> Links:
> ------
> [1] http://192.168.56.0/24
> _______________________________________________
> 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: Wed, 18 Aug 2021 11:46:58 +0530
From: Kraishak Mahtha <kraishak....@gmail.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>
Subject: Re: Getting Peer hold all free leases
Message-ID:
<CADDat86+Xf54tJkhax4hL+U=wtme8cnagp-pufujs_qrc3u...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Hi Glenn,
I tried checking with tcpdump command to make sure traffic is able to
communicate initially, But again as recommended I checked with telnet
command as well
>From primary:
==========
command used: /usr/bin/telnet 192.168.56.178 647
Trying 192.168.56.178...
Connected to 192.168.56.178.
Escape character is '^]'.
>From failover
=========
/usr/bin/telnet 192.168.56.156 647
Trying 192.168.56.156...
Connected to 192.168.56.156.
Escape character is '^]'.
I hope this means the ports are able to communicate each other, Please
correct me If I am wrong in understanding this output
I also tried checking netstat to check port status
>From Primary
===========
netstat -tulpna | grep 647
tcp 0 0 192.168.56.156:647 0.0.0.0:* LISTEN
8599/dhcpd
tcp 0 0 192.168.56.156:47907 192.168.56.178:647
ESTABLISHED 8599/dhcpd
>From Failover
==========
netstat -tulpna | grep 647
tcp 0 0 192.168.56.178:647 0.0.0.0:* LISTEN
7574/dhcpd
tcp 0 0 192.168.56.178:647 192.168.56.156:47907
ESTABLISHED 7574/dhcpd
not blocked by any firewalls
------> I don't have a firewall setup between the servers
Could you post the failover clause from dhcpd.conf from both servers?
----> yes I did shared already in the thread,
Failover section from primary config
=========================
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;
}
Failover section from failover config
======================
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;
}
On Wed, Aug 18, 2021 at 10:51 AM Kraishak Mahtha <kraishak....@gmail.com>
wrote:
> Question to ISC Team,
>
> Can we manually send a request for the DHCP server from externally to do
> the pool balance for a specific subnet? or sent a force parameter in send
> request to balance specific subnet
>
> Thanks
> Kraishak
>
> 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
>>
>>
>>
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