DHCP failover not balancing
li jun
li-jun-a at hdsc.hitachi-displays.com
Tue Sep 2 04:44:53 UTC 2008
and also the same problem troubles me for a long time
would anyone help me
---------------------
LIJUN
CN
> -----Original Message-----
> From: dhcp-users-bounce at isc.org
> [mailto:dhcp-users-bounce at isc.org] On Behalf Of Michael Robbert
> Sent: Thursday, August 21, 2008 1:22 AM
> To: dhcp-users at isc.org
> Subject: DHCP failover not balancing
>
> I have got a problem with my DHCP servers(3.1.1b1) that are
> setup with failover. The initial problem looked like this:
> DHCPDISCOVER packet is sent and is recieved by both servers.
> Primary says "load balance to peer" and Secondary says "peer
> holds all free leases". No lease is given and user can't get
> on the network. Upon investigation I have found that the pool
> messages logged on each server do not agree with each other.
> For the pool in question it looks something like this:
>
> Primary server:
> Aug 20 09:17:04 primary dhcpd: balancing pool 8123240 1.2.3/22 total
> 949 free 206 backup 382 lts -88 max-own (+/-)59 Aug 20
> 09:17:04 primary dhcpd: balanced pool 8123240 1.2.3/22 total
> 949 free 206 backup 382 lts -88 max-misbal 88
>
> Secondary server:
> Aug 20 09:17:04 secondary dhcpd: balanced pool 8123178 1.2.3/22 total
> 949 free 588 backup 0 lts -294 max-misbal 88 Aug 20
> 09:17:04 secondary dhcpd: balancing pool 814e9f0 1.2.3/22
> total 30 free 19 backup 0 lts -9 max-own (+/-)2
> (requesting peer rebalance!)
>
> Our setup has been running without problems for some time
> now, but I have always noticed that lts values are quite
> often much greater or less than 1, which according to my
> reading should not happen on a regular basis. This is a
> university campus so the problem has reared its head now that
> students are back on campus, but this was working fine last
> spring. Here are the basics of our failover setup:
>
> failover peer "primary-secondary" {
> primary;
> address 1.2.3.2;
> port 520;
> peer address 1.2.3.3;
> peer port 520;
> max-response-delay 30;
> max-unacked-updates 10;
> load balance max seconds 3;
> mclt 1800;
> split 128;
> }
>
> failover peer "primary-secondary" {
> secondary;
> address 1.2.3.3;
> port 520;
> peer address 1.2.3.2;
> peer port 520;
> max-response-delay 30;
> max-unacked-updates 10;
> load balance max seconds 3;
> }
>
> What can we do to get these pools balanced?
>
> Thanks,
> Mike Robbert
>
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