atom feed10 messages in org.isc.lists.dhcp-usersRe: Multiple dhcrelay setup causing m...
FromSent OnAttachments
Michael HodgkinsonAug 11, 2010 8:44 pm 
bud...@rootbox.or.idAug 14, 2010 2:38 pm 
Michael HodgkinsonAug 15, 2010 9:51 pm 
Simon HobsonAug 16, 2010 4:44 am 
Randall C GrimshawAug 16, 2010 5:35 am 
Michael HodgkinsonAug 16, 2010 2:52 pm 
Michael HodgkinsonAug 16, 2010 3:53 pm 
Simon HobsonAug 17, 2010 12:00 am 
Michael HodgkinsonAug 17, 2010 3:17 pm 
Simon HobsonAug 17, 2010 11:54 pm 
Subject:Re: Multiple dhcrelay setup causing multiple duplicate DHCP requests
From:bud...@rootbox.or.id (bud@rootbox.or.id)
Date:Aug 14, 2010 2:38:50 pm
List:org.isc.lists.dhcp-users

Hi guys,

I need some assistance with a multiple dhcrelay setup with failover dhcpd servers. The problem I'm getting is multiple duplicate dhcp requests being received by the dhcpd servers (which is filling up the disk very quickly on the server).

Here is the log from one of the dhcp servers showing the result: Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPREQUEST for 10.1.70.185 from 00:0c:29:42:f1:1b via 10.1.70.1 Jul 30 11:56:31 alns0 dhcpd: DHCPACK on 10.1.70.185 to 00:0c:29:42:f1:1b via 10.1.70.1

The network is configured like this:

[ dhcpd1 ] | eth0/vlan120 [ fw1/dhcrelay ] eth5 | eth5 [ fw2/dhcrelay ] eth0/vlan120 | [ dhcpd2 ]

The configuration on the dhcrelays is like this:

/usr/sbin/dhcrelay3 -q -i eth0 -i eth1 -i vlan1 -i vlan120 -i vlan140 -i vlan150 -i vlan151 -i vlan170 dhcpd1 dhcpd2 (actually have IPs in here)

I'm having same situation. On my dhcpd servers showed logs like this. Except, the ip's is from all the dhcrelay (I have 6 dhcrelay). Other than some logs that get bigger and bigger, there's no another effect I presume. CMIIW.