Red Hat Bugzilla – Bug 57961
DHCPRELEASE breaks dhcp failover configuration
Last modified: 2008-05-01 11:38:01 EDT
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Description of problem:
With failover, if a client issues a DHCPRELEASE, any further DHCPDISCOVERS
by the client results in both servers responding to the request.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Configure two DHCP servers for failover, clean out the lease files and
activate the servers.
2. Have a client perform a DHCPRELEASE and then a DHCPDISCOVER.
Actual Results: Both servers respond to the DHCPDISCOVER.
Expected Results: Only one server should respond.
Redhat 7.2, installed with dhcp-3.0.1rc4-1cra.rpm . dhcp-3.0.1 also has
This problem has been posted on the dhcp-server mailing list twice, but
there has been no response.
It doesn't appear to matter if the client obtains the lease before or
after the servers are turned on; when the client issues the first
DHCPRELEASE is when the problems start.
Additionally, how reliable is failover in the present version of dhcpd?
We would like to use it for a very large number of clients, but from
reading the mailing list I get the impression that it is not yet ready for
dhcp-2.0pl5 is the package in RHL 7.2 - you're using a totally custom package
that there is no chance of fixing bugs against.
The best I can do is either redirect you to the RH support/services/consulting
dudes (who will sing and dance if you pay them enough, in addition to providing
HA solutions), or tell you to keep trying with the upstream authors of dhcpd...