failover without any pool configured to failover

Munroe Sollog mus3 at lehigh.edu
Thu Dec 17 14:57:54 UTC 2015


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


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