Option 82 is missing from Secondry lease file incase of failover

Thomas Markwalder tmark at isc.org
Wed Jul 11 17:59:06 UTC 2018


Hello:

I will double check this and get back to you.

Regards,

Thomas Markwalder
ISC Software Engineering

On 07/11/2018 01:52 PM, perl-list wrote:
> Folks,
>
> If any ISC employee is still monitoring this list, could we get an 
> official confirmation that option 82 data (ie: option agent.circuit-id 
> and option agent.remote-id) is NOT shared during the failover 
> synchronization between failover peers and that this is by design (ie: 
> not a bug)?
>
> ------------------------------------------------------------------------
>
>     *From: *"Christian Kratzer" <ck-lists at cksoft.de>
>     *To: *"Users of ISC DHCP" <dhcp-users at lists.isc.org>
>     *Sent: *Monday, July 2, 2018 11:32:20 AM
>     *Subject: *Re: Option 82 is missing from Secondry lease file
>     incase of failover
>
>     Hi,
>
>     On Mon, 2 Jul 2018, perl-list wrote:
>
>     > This is still a problem. It isn't that only the primary has the
>     option 82 information. Its actually that the issuing server (the
>     one that sent the offer) has the option 82 information in the
>     dhcpd.leases file. The one that did not issue and received the
>     lease via failover synchronization DOES NOT have the option 82
>     stashed in the dhcpd.leases file. I have stash-agent-options true;
>     in the config file.
>     >
>
>     yes I believe I cam to the same conclusion when evaluating isc
>     dhcp failover for a certain use case a couple of years ago.
>
>     Agent options are not replicated between failover peers.
>
>     I added agent options to the omapi lease lookups back then.
>
>     Something similar would have to be done to the lease replication
>     for failover but I have not looked into it.
>
>     Time would propably be better spent in transitioning to KEA which
>     also has a superior failover mode that also works for ipv6.
>
>     Greetings
>     Christian
>
>     -- 
>     Christian Kratzer                   CK Software GmbH
>     Email:   ck at cksoft.de               Wildberger Weg 24/2
>     Phone:   +49 7032 893 997 - 0       D-71126 Gaeufelden
>     Fax:     +49 7032 893 997 - 9       HRB 245288, Amtsgericht Stuttgart
>     Mobile:  +49 171 1947 843           Geschaeftsfuehrer: Christian
>     Kratzer
>     Web:     http://www.cksoft.de/
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>
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