[Kea-users] Strange behaviour with shared networks

Jason Lixfeld jason-kea at lixfeld.ca
Fri Oct 20 22:10:00 UTC 2017


Hi Rob,

This was addressed just about a week ago.  Refer to this thread:

https://lists.isc.org/pipermail/kea-users/2017-October/001345.html

> On Oct 20, 2017, at 4:09 PM, Sutherland, Rob <Robert.B.Sutherland at windstream.com> wrote:
> 
> Like many others, I am evaluating Kea as a replacement for ISC DHCP. While I can get Kea to behave mostly as I like, I am seeing some odd behaviours when I use shared networks. Here’s one:
>  
> A single phone is assigned an IP address (via dhcrelay). I deliberately set the renew-timer to a low value (100 seconds). When the phone sends a DHCPREQUEST for the same address (after 100 seconds), the server sends a DHCPNAK. This causes the phone to reboot and restart the DHCP cycle. The second time around the phone succeeds in getting an IP address but a different one.
>  
> I was running Kea with debugging turned on so I have attached the output (as well as the configuration file and a packet trace).
>  
> Here’s the lease file showing the same MAC getting different IP addresses:
> address,hwaddr,client_id,valid_lifetime,expire,subnet_id,fqdn_fwd,fqdn_rev,hostname,state
> 10.148.1.68,08:00:0f:6c:c5:a9,01:08:00:0f:6c:c5:a9,400,1508526744,2,0,0,,0
> 10.148.1.69,08:00:0f:6c:c5:a9,01:08:00:0f:6c:c5:a9,400,1508526896,2,0,0,,0
>  
> More on the environment:
> ·         Kea 1.3.0 beta
> ·         SLES12 server with more than enough CPU, RAM etc
>  
> Any thoughts?
>  
> Rob
>  
>  
> <memfile2.json><nak_output.txt><kea_sles12_nak.pcap>_______________________________________________
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