failover without any pool configured to failover

[Munroe Sollog]

Good idea but...

Dec 17 10:18:31 humpty isc-dhcp-server[14612]: Pool declarations must always contain at least
Dec 17 10:18:31 humpty dhcpd: one range statement.
Dec 17 10:18:31 humpty isc-dhcp-server[14612]: one range statement.
Dec 17 10:18:31 humpty dhcpd: Configuration file errors encountered -- exiting


On 12/17/2015 10:03 AM, Glenn Satchell wrote:
> Why not create a pool within an existing subnet but don't define a range,
> so no hosts can get assigned?
> 
> subnet 192.168.8.64 netmask 255.255.255.192 {
>        option domain-name-servers 192.168.1.3;
>        option routers 192.168.8.126;
>        pool {
> #           failover peer "failover-partner";
> 
>             range 192.168.8.65 192.168.8.121;
>             allow unknown clients;
>             }
>        pool {
>             failover peer "failover-partner";
>             }
> }
> 
> regards,
> -glenn
> 
> On Fri, December 18, 2015 1:57 am, Munroe Sollog wrote:
>> We are looking to deploy the isc-dhcp-server failover feature, however
>> we'd like to deploy it in a
>> staged approach.  Is it possible to configure the failover pairs but *not*
>> configure any pools to
>> failover?  When I try I get:
>>
>> Dec 17 09:56:05 humpty isc-dhcp-server[14554]: Stopping ISC DHCP server:
>> dhcpd.
>> Dec 17 09:56:05 humpty dhcpd: Internet Systems Consortium DHCP Server
>> 4.3.1
>> Dec 17 09:56:05 humpty dhcpd: Copyright 2004-2014 Internet Systems
>> Consortium.
>> Dec 17 09:56:05 humpty dhcpd: All rights reserved.
>> Dec 17 09:56:05 humpty dhcpd: For info, please visit
>> https://www.isc.org/software/dhcp/
>> Dec 17 09:56:05 humpty dhcpd: Internet Systems Consortium DHCP Server
>> 4.3.1
>> Dec 17 09:56:05 humpty dhcpd: Copyright 2004-2014 Internet Systems
>> Consortium.
>> Dec 17 09:56:05 humpty dhcpd: All rights reserved.
>> Dec 17 09:56:05 humpty dhcpd: For info, please visit
>> https://www.isc.org/software/dhcp/
>> Dec 17 09:56:05 humpty dhcpd: Wrote 29 leases to leases file.
>> Dec 17 09:56:05 humpty dhcpd: failover peer failover-partner: I move from
>> normal to startup
>> Dec 17 09:56:05 humpty dhcpd: failover peer declaration with no referring
>> pools.
>> Dec 17 09:56:05 humpty dhcpd: In order to use failover, you MUST refer to
>> your main failover declaration
>> Dec 17 09:56:05 humpty dhcpd: in each pool declaration.   You MUST NOT use
>> range declarations outside
>> Dec 17 09:56:05 humpty dhcpd: of pool declarations.
>> Dec 17 09:56:05 humpty dhcpd:
>> Dec 17 09:56:05 humpty dhcpd: If you think you have received this message
>> due to a bug rather
>> Dec 17 09:56:05 humpty dhcpd: than a configuration issue please read the
>> section on submitting
>> Dec 17 09:56:05 humpty dhcpd: bugs on either our web page at www.isc.org
>> or in the README file
>> Dec 17 09:56:05 humpty dhcpd: before submitting a bug.  These pages
>> explain the proper
>> Dec 17 09:56:05 humpty dhcpd: process and the information we find helpful
>> for debugging..
>> Dec 17 09:56:05 humpty dhcpd:
>> Dec 17 09:56:05 humpty dhcpd: exiting.
>> Dec 17 09:56:07 humpty isc-dhcp-server[14561]: Starting ISC DHCP server:
>> dhcpdcheck syslog for
>> diagnostics. ... failed!
>> Dec 17 09:56:07 humpty isc-dhcp-server[14561]: failed!
>> Dec 17 09:56:07 humpty systemd[1]: isc-dhcp-server.service: control
>> process exited, code=exited status=1
>> Dec 17 09:56:07 humpty systemd[1]: Failed to start LSB: DHCP server.
>> Dec 17 09:56:07 humpty systemd[1]: Unit isc-dhcp-server.service entered
>> failed state.
>>
>>
>> My config looks like:
>>
>>
>> failover peer "failover-partner" {
>>         primary;
>> ##MUST BE IP ADDRESSES
>>
>>         address 192.168.8.1;
>>         port 519;
>>         peer address 192.168.8.2;
>>         peer port 520;
>>         max-response-delay 60;
>>         max-unacked-updates 10;
>>         mclt 3600;
>>         split 128;
>>         load balance max seconds 3;
>>     }
>>
>> subnet 192.168.8.0 netmask 255.255.255.192 {
>> }
>>
>> subnet 192.168.8.64 netmask 255.255.255.192 {
>>        option domain-name-servers 192.168.1.3;
>>        option routers 192.168.8.126;
>>        pool {
>> #           failover peer "failover-partner";
>>
>>             range 192.168.8.65 192.168.8.121;
>>             allow unknown clients;
>>             }
>> }
>>
>>
>> --
>> Munroe Sollog
>> LTS - Network Analyst
>> x85002
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
> 
> 
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> 

-- 
Munroe Sollog
LTS - Network Analyst
x85002