Bug 57961 - DHCPRELEASE breaks dhcp failover configuration
DHCPRELEASE breaks dhcp failover configuration
Product: Red Hat Linux
Classification: Retired
Component: dhcp (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Elliot Lee
Depends On:
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Reported: 2002-01-03 10:36 EST by Darren Gamble
Modified: 2008-05-01 11:38 EDT (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2002-01-03 10:36:54 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Darren Gamble 2002-01-03 10:36:49 EST
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)

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):

How reproducible:

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.

Additional info:

Redhat 7.2, installed with dhcp-3.0.1rc4-1cra.rpm .  dhcp-3.0.1 also has 
this behavior.

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 
production-grade service.
Comment 1 Elliot Lee 2002-01-03 11:46:50 EST
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...

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