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Today's Topics:
1. test (spammailbox)
2. Failover host stops releasing IP's if the peer is down. (p0wn3rs)
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Message: 1
Date: Sun, 08 Dec 2019 21:49:58 +0100
From: "spammailbox" <s...@umutkuepeli.eu>
To: dhcp-users@lists.isc.org
Subject: test
Message-ID: <44-5ded6200-7-5a689480@245376047>
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Message: 2
Date: Mon, 9 Dec 2019 10:59:50 +0100
From: p0wn3rs <p0wn...@gmail.com>
To: dhcp-users@lists.isc.org
Subject: Failover host stops releasing IP's if the peer is down.
Message-ID: <8662b328-6c30-443d-853d-32d6b8db1...@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Hello,
we have different DHCP clusters and sometimes happens for a system to be
down for a long time (the location doesn't grant us immediate physical
access and the hw doesn't support WOL).
Whenever this happens the main host stops releasing IP's...
Dec? 9 10:39:36 fw-01 dhcpd: DHCPDISCOVER from 00:a0:ba:0f:d6:ff via
br1: not responding (recovering)
Dec? 9 10:39:37 fw-01 dhcpd: DHCPDISCOVER from 00:a0:ba:0f:d7:29 via
br1: not responding (recovering)
Dec? 9 10:39:39 fw-01 dhcpd: DHCPDISCOVER from 00:a0:ba:0f:d6:ff via
br1: not responding (recovering)
Dec? 9 10:39:41 fw-01 dhcpd: DHCPDISCOVER from 00:a0:ba:0f:d7:29 via
br1: not responding (recovering)
Dec? 9 10:39:43 fw-01 dhcpd: DHCPDISCOVER from 00:a0:ba:0f:d6:ff via
br1: not responding (recovering)
Configuration :
cat /etc/dhcpd.conf
ddns-update-style none;
deny bootp;
authoritative;
option wpad code 252 = text;
failover peer "CLUSTER" {
??? primary;
??? mclt 600;
??? split 128;
??? address 192.168.177.1;
??? peer address 192.168.177.2;
??? port 519;
??? peer port 519;
??? max-response-delay 30;
??? max-unacked-updates 10;
??? load balance max seconds 3;
}
shared-network SERVERS {
??? interface br1;
??? server-identifier 192.168.18.1;
??? subnet 192.168.18.0 netmask 255.255.255.0 {
??????? pool {
??????????? failover peer "CLUSTER";
??????????? deny dynamic bootp clients;
??????????? range 192.168.18.100 192.168.18.200;
??????? }
??????? default-lease-time 3600;
??????? max-lease-time 7200;
??????? option subnet-mask 255.255.255.0;
??????? option domain-name "mydomain.com";
??????? option routers 192.168.18.1;
??????? option wpad "http://192.168.18.1/proxy.pac";;
??????? option domain-name-servers 192.168.18.1;
??? }
}
lease-file-name "/var/lib/dhcp/dhcpd.leases";
cat /var/lib/dhcp/dhcpd.leases
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.2.5-P1
failover peer "CLUSTER" state {
? my state recover at 1 2019/12/09 08:52:57;
? partner state unknown-state at 1 2019/12/09 08:52:57;
}
failover peer "CLUSTER" state {
? my state recover at 1 2019/12/09 08:52:57;
? partner state unknown-state at 1 2019/12/09 08:52:57;
}
server-duid "\000\001\000\001%\200\307\351\200\306\312\001\015\354";
failover peer "CLUSTER" state {
? my state recover at 1 2019/12/09 08:52:57;
? partner state unknown-state at 1 2019/12/09 08:52:57;
}
So, the partner state is in "unknown-state" because of course is down,
but shouldn't the host be releasing IP's after some time?
How can we solve this problem?
thanks,
Robert.
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