nanog mailing list archives
Re: ISC DHCP server failover
From: Dan White <dwhite () olp net>
Date: Wed, 17 Mar 2010 09:22:06 -0500
On 17/03/10 10:01 -0400, Summers, William wrote:
Greetings Nanog members,I am wondering if anyone has implemented the failover features of ISC DHCP? And if so, how successful has failover been in your environment?
We've been running version 4 in a failover scenario for a couple of years. It's worked very well for us in an ISP environment. We serve several networks from a pair of servers. We've experienced two types of problems from time to time: The servers stop balancing their addresses, and one server starts to exhibit 'peer holds all free leases' in its logs, in which case we need to restart the dhcpd process(es) to force a rebalance. In some cases, and I'm not sure which equipment may be to blame, if one server goes down then the other server will not hand out addresses to clients which had originally received addresses from the failed server. We've dealt with that by balancing our lease times with our MTTR for a failed server. -- Dan White
Current thread:
- ISC DHCP server failover Summers, William (Mar 17)
- Re: ISC DHCP server failover sthaug (Mar 17)
- Re: ISC DHCP server failover Dan White (Mar 17)
- Re: ISC DHCP server failover Blake Covarrubias (Mar 17)
- Re: ISC DHCP server failover David W. Hankins (Mar 19)
- Re: ISC DHCP server failover Mike (Mar 19)
- Re: ISC DHCP server failover sthaug (Mar 20)
- Re: ISC DHCP server failover Dan White (Mar 20)
- Re: ISC DHCP server failover Leo Bicknell (Mar 20)
- Re: ISC DHCP server failover David W. Hankins (Mar 21)
- Re: ISC DHCP server failover Raymond Dijkxhoorn (Mar 17)